WO2022251984A1 - 一种数据处理方法及装置 - Google Patents

一种数据处理方法及装置 Download PDF

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Publication number
WO2022251984A1
WO2022251984A1 PCT/CN2021/097050 CN2021097050W WO2022251984A1 WO 2022251984 A1 WO2022251984 A1 WO 2022251984A1 CN 2021097050 W CN2021097050 W CN 2021097050W WO 2022251984 A1 WO2022251984 A1 WO 2022251984A1
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WIPO (PCT)
Prior art keywords
command
commands
sequence
order
execution
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PCT/CN2021/097050
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English (en)
French (fr)
Inventor
沈绍锋
夏加强
毛刚品
肖翔
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华为技术有限公司
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Application filed by 华为技术有限公司 filed Critical 华为技术有限公司
Priority to PCT/CN2021/097050 priority Critical patent/WO2022251984A1/zh
Priority to EP21943366.1A priority patent/EP4322015A4/en
Priority to CN202180094528.8A priority patent/CN116917876A/zh
Publication of WO2022251984A1 publication Critical patent/WO2022251984A1/zh
Priority to US18/512,033 priority patent/US20240086114A1/en

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L67/00—Network arrangements or protocols for supporting network services or applications
    • H04L67/50—Network services
    • H04L67/60—Scheduling or organising the servicing of application requests, e.g. requests for application data transmissions using the analysis and optimisation of the required network resources
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/06—Digital input from, or digital output to, record carriers, e.g. RAID, emulated record carriers or networked record carriers
    • G06F3/0601—Interfaces specially adapted for storage systems
    • G06F3/0628—Interfaces specially adapted for storage systems making use of a particular technique
    • G06F3/0655—Vertical data movement, i.e. input-output transfer; data movement between one or more hosts and one or more storage devices
    • G06F3/0659—Command handling arrangements, e.g. command buffers, queues, command scheduling
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/06—Digital input from, or digital output to, record carriers, e.g. RAID, emulated record carriers or networked record carriers
    • G06F3/0601—Interfaces specially adapted for storage systems
    • G06F3/0602—Interfaces specially adapted for storage systems specifically adapted to achieve a particular effect
    • G06F3/0604—Improving or facilitating administration, e.g. storage management
    • G06F3/0605—Improving or facilitating administration, e.g. storage management by facilitating the interaction with a user or administrator
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/06—Digital input from, or digital output to, record carriers, e.g. RAID, emulated record carriers or networked record carriers
    • G06F3/0601—Interfaces specially adapted for storage systems
    • G06F3/0602—Interfaces specially adapted for storage systems specifically adapted to achieve a particular effect
    • G06F3/061—Improving I/O performance
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/06—Digital input from, or digital output to, record carriers, e.g. RAID, emulated record carriers or networked record carriers
    • G06F3/0601—Interfaces specially adapted for storage systems
    • G06F3/0668—Interfaces specially adapted for storage systems adopting a particular infrastructure
    • G06F3/0671—In-line storage system
    • G06F3/0673—Single storage device
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/06—Digital input from, or digital output to, record carriers, e.g. RAID, emulated record carriers or networked record carriers
    • G06F3/0601—Interfaces specially adapted for storage systems
    • G06F3/0668—Interfaces specially adapted for storage systems adopting a particular infrastructure
    • G06F3/0671—In-line storage system
    • G06F3/0673—Single storage device
    • G06F3/0679—Non-volatile semiconductor memory device, e.g. flash memory, one time programmable memory [OTP]

Definitions

  • the embodiments of the present application relate to the field of data storage, and in particular, to a data processing method and device.
  • User operations can be understood as operations on the file system, such as reading and saving files (that is, data), and the file system converts these user operations into IO Read, IO write and other commands.
  • Embodiments of the present application provide a data processing method and device to ensure the execution order of multiple commands.
  • a data processing method is provided. First, a first device acquires multiple first commands. Then, the first device encapsulates the first command to obtain a second command, where, when the multiple first commands include at least two target commands with order preservation requirements, the encapsulation includes Adding a sequence identifier to the target command, where the sequence identifier is used to indicate the execution sequence of the target command. Next, the first device sends multiple second commands in parallel.
  • the encapsulation further includes format conversion, and the converted format meets the agreement between the first device and the second device.
  • the first device sends multiple second commands (including the first command and the sequence identifier corresponding to the first command) to the second device in parallel, and the second device can sequentially execute multiple first commands according to the sequence identifier.
  • the commands are scheduled to execute the plurality of first commands sequentially. Not only can the execution sequence of multiple first commands be guaranteed, but also the second device can reasonably use its own idle time to process multiple first commands in time, reduce the execution waiting time of multiple first commands, improve the performance of the storage system, and improve the user experience. experience.
  • the first command is an IO command.
  • any one of the first commands is: a write command to user data or a write command to node data, where the node data is used to indicate a location where the user data is stored.
  • the execution sequence of the write command for node data is before the execution sequence of the write command for user data. It can be understood that the data processing method is applied to a flash friendly file system (flash friendly file system, F2FS).
  • flash friendly file system flash friendly file system, F2FS
  • the first command is used to write data from the memory (the memory on the first device side) into the flash memory array (the flash memory array on the second device side).
  • the sequence identifier is a sequence number
  • the execution sequence of the commands is indicated by the value of the sequence number
  • the execution sequence of commands with small serial numbers is earlier than that of commands with large serial numbers, or the execution sequence of commands with large serial numbers is earlier than that of commands with small serial numbers.
  • the first device may also acquire an order-preserving identification command, where the order-preserving identification command is used to indicate that the execution order of the command preceding the order-preserving identification command is earlier than the order-preserving identification command
  • the execution sequence of the next command (the first command after the sequence-preserving identification command) of Further, the first command obtained before the order-preserving identification command and the first command obtained after the order-preserving identification command may be determined as target commands.
  • the sequence number added by the first device to the first command obtained before the order-preserving identification command is the same as the sequence number added to the first first command obtained after the order-preserving identification command.
  • the serial number is different.
  • sequence number added by the first device to the first command obtained before the sequence-preserving identification command is smaller than the sequence number added to the first first command obtained after the sequence-preserving identification command.
  • sequence number added by the first device to the first command obtained before the sequence-preserving identification command is greater than the sequence number added to the first first command obtained after the sequence-preserving identification command.
  • the first device sends multiple second commands in parallel and out of sequence.
  • the encapsulating further includes: adding a sequence identifier to a first command in the plurality of first commands except the target command.
  • a data processing method in which a second device receives multiple second commands in parallel. Then, decapsulating the second command, the decapsulating includes parsing the first command included in the second command and a sequence identifier, where the sequence identifier is used to indicate the execution sequence of the commands with the order preservation requirement. Next, the second device schedules the multiple first commands according to the sequence identifier.
  • the second device receives multiple second commands in parallel, and after parsing out the sequence identifier, the second device may sequentially schedule the multiple first commands according to the sequence identifier, and execute the multiple first commands sequentially. Not only can the execution sequence of multiple first commands be guaranteed, but also the second device can reasonably use its own idle time to process multiple first commands in time, reduce the execution waiting time of multiple first commands, improve the performance of the storage system, and improve the user experience. experience.
  • the sequence identifier is a sequence number; the second device may schedule multiple first commands according to the value of the sequence number.
  • the second device receives multiple second commands in parallel and out of sequence.
  • a data processing device in a third aspect, has a function of realizing the above-mentioned first aspect and any possible implementation of the first aspect.
  • These functions may be implemented by hardware, or may be implemented by executing corresponding software through hardware.
  • the hardware or software includes one or more functional modules corresponding to the above functions.
  • the data processing apparatus includes: a file system layer, a driver layer, and a first interface layer.
  • the file system layer is used to obtain a plurality of first commands.
  • the driver layer is configured to acquire multiple first commands. It can be understood that, after acquiring the multiple first commands, the file system layer sends the multiple first commands to the driver layer.
  • the driver layer is configured to encapsulate the first command to obtain a second command, wherein, when the plurality of first commands include at least two target commands with order preservation requirements, the encapsulation includes Adding a sequence identifier to the target command, where the sequence identifier is used to indicate the execution sequence of the target command.
  • the first interface layer is configured to send multiple second commands in parallel.
  • the file system layer may also send an order preservation flag command (flag) to the driver layer; correspondingly, the driver layer is also used to obtain the order preservation flag from the file system layer Order.
  • the order-preserving flag command (flag) is used to indicate that: the execution sequence of the first command before the order-preserving flag command (flag) is earlier than the next first command ( The execution order of the first command behind the order-preserving identification command).
  • the order-preserving flag command (flag) is sent between any two target commands, and the order-preserving flag command (flag) is the same as the target whose sending time is later in the two target commands There are no other commands between commands.
  • the driver layer is further configured to determine, as target commands, the first command obtained before the order-preserving identification command and the first command obtained after the order-preserving identification command.
  • the sequence number added by the driver layer to the first command obtained before the order-preserving identification command is the same as the sequence number added to the first first command obtained after the order-preserving identification command The added serial number is different.
  • the first interface layer sends multiple second commands in parallel and out of sequence.
  • the encapsulating further includes: adding a sequence identifier to a first command in the plurality of first commands except the target command.
  • a data processing device in a fourth aspect, has a function of realizing the above-mentioned second aspect and any possible implementation of the second aspect.
  • These functions may be implemented by hardware, or may be implemented by executing corresponding software through hardware.
  • the hardware or software includes one or more functional modules corresponding to the above functions.
  • the data processing apparatus includes: a second interface layer, a command scheduling layer.
  • the second interface layer is configured to receive multiple second commands in parallel.
  • the command scheduling layer is configured to decapsulate the second command, the decapsulation includes parsing the first command included in the second command and a sequence identifier, and the sequence identifier is used to indicate a command with an order preservation requirement
  • the execution sequence of the first commands is scheduled according to the sequence identifier.
  • a data processing device including a processor, and optionally, a memory; the processor is coupled to the memory; the memory is used to store computer programs or instructions; the processor , for executing part or all of the computer programs or instructions in the memory, when the part or all of the computer programs or instructions are executed, for implementing the above first aspect and any possible implementation method of the first aspect
  • the function of the first device, or the function of the second device in the second aspect and any possible implementation of the second aspect is provided, including a processor, and optionally, a memory; the processor is coupled to the memory; the memory is used to store computer programs or instructions; the processor , for executing part or all of the computer programs or instructions in the memory, when the part or all of the computer programs or instructions are executed, for implementing the above first aspect and any possible implementation method of the first aspect
  • the function of the first device, or the function of the second device in the second aspect and any possible implementation of the second aspect is provided, including a processor, and optionally, a memory; the processor is coupled to the memory; the memory
  • the device may further include a communication interface, the communication interface is coupled to the processor, and the communication interface is used to send the signal processed by the processor, or receive an input to the signal to the processor.
  • the interface may perform the sending action or receiving action performed by the first device in the first aspect and any possible implementation of the first aspect; or, perform the second aspect and any possible implementation of the second aspect performed by the second device. Send action or receive action.
  • the processor is configured to: obtain a plurality of first commands; encapsulate the first commands to obtain a second command, wherein the plurality of first commands include at least two target commands with order preservation requirements
  • the encapsulation includes adding a sequence identifier to the target command, and the sequence identifier is used to indicate the execution order of the target command;
  • the communication interface is configured to: send multiple second commands in parallel.
  • the first command is an IO command.
  • the first command is: a write command for user data; or a write command for node data; wherein the node data is used to indicate the location where the user data is stored.
  • sequence identifier is a sequence number
  • execution sequence is indicated by the numerical value of the sequence number.
  • the processor is further configured to: acquire an order-preserving identification command, where the order-preserving identification command is used to indicate that: the execution order of the command preceding the order-preserving identification command is earlier than that of the order-preserving identification command
  • the execution order of the next command determine the first command obtained before the order-preserving identification command and the first command obtained after the order-preserving identification command as target commands.
  • sequence number added to the first command obtained before the sequence-preserving identification command is different from the sequence number added to the first first command obtained after the sequence-preserving identification command.
  • the communication interface when used to send multiple second commands in parallel, it is specifically used to: send multiple second commands in parallel and out of order.
  • the encapsulation further includes: adding a sequence identifier to a first command in the plurality of first commands except the target command.
  • a storage controller including: a processor, and a communication interface coupled to the processor;
  • the communication interface is configured to: receive multiple second commands in parallel;
  • the processor is configured to: decapsulate the second command, where the decapsulation includes parsing the first command included in the second command and a sequence identifier, where the sequence identifier is used to indicate the The execution sequence of the commands; scheduling multiple first commands according to the sequence identifier.
  • the sequence identifier is a sequence number; when the processor is used to schedule multiple first commands according to the sequence identifier, it is specifically configured to: according to the value of the sequence number size, dispatching a plurality of said first commands.
  • a seventh aspect provides a flash memory, the flash memory includes the storage controller described in the sixth aspect, and a flash memory array; the storage controller is configured to: schedule the first command to access the flash memory array.
  • a computer-readable storage medium for storing a computer program, the computer program including instructions for realizing the functions of the first aspect and any possible implementation of the first aspect, or for realizing Instructions for the functions of the second aspect and any possible implementation of the second aspect.
  • a computer-readable storage medium is used to store a computer program.
  • the computer program When the computer program is executed by a computer, the computer can execute the first device in the above-mentioned first aspect and any possible implementation method of the first aspect. Execute the method, or execute the second aspect and the method executed by the second device in any possible implementation of the second aspect.
  • a computer program product comprising: computer program code, when the computer program code is run on a computer, the computer is made to execute the above-mentioned first aspect and any possible method of the first aspect. Implement the method executed by the first device, or execute the method executed by the second device in the second aspect and any possible implementation of the second aspect.
  • Fig. 1 is a kind of NAND Flash storage system structural diagram applicable to the embodiment of the present application
  • Fig. 2 is a schematic diagram of a data processing process applicable to the embodiment of the present application.
  • Fig. 3 is another kind of NAND Flash storage system structural diagram applicable to the embodiment of the present application.
  • FIG. 4 is a structural diagram of a data processing device applicable to an embodiment of the present application.
  • FIG. 5 is a structural diagram of a data processing device applicable to an embodiment of the present application.
  • the file system in this application can be understood as a system for managing files.
  • the data of the file system includes node data (node data) and user data (user data).
  • User data is the file itself, such as pictures, videos, chat records, etc.
  • Node data is used by the file system to index the logical location of the file in the storage device.
  • User operations can be understood as operations on the file system, mainly reading and saving files, and the file system converts these user operations into IO reading and IO writing , FLUSH and other commands (commands can also be replaced with requests).
  • the data corresponding to these IO read commands and IO write commands includes: user data of the file itself (such as a picture), and can also include node data (node data) generated by the file system for recording where the user data is in the file system.
  • Node data (node data) is similar to a multi-level index table. In most cases, these node data (node data) need to wait for the user data (user data) of the file itself (such as a picture) to be written to the storage device before it can be saved. Node data (node data) to the storage device. In order to facilitate the file system to search the user data (user data) of the file itself (such as a picture) according to the node data (node data).
  • node data is saved to the storage device first, but the user data (user data) of the file itself (such as a picture) is not stored in the logical location corresponding to the node data (node data), then the file system is based on the node data (node data) Search for the user data (user data) of the file itself (such as a picture), and an exception will occur because the user data (user data) cannot be found.
  • the file system maintains the order between the user data (user data) of the file itself (such as a picture) and the related node data (node data) in a serial manner or by interspersing FLUSH commands between them.
  • RAM random access memory
  • the data is not retained when the power is turned off.
  • the content of the storage unit can be taken out or stored at will, and the speed of access has nothing to do with the location of the storage unit. It loses its stored content when the power is turned off, and is mainly used to store programs that are used for a short time.
  • Flash Power off data retention. It has the performance of electrically erasable programmable read-only memory (electrically EPROM, EEPROM), and can keep data for a long time without current supply. Its storage characteristics are equivalent to hard disks, and it can also read data quickly.
  • Flash mainly includes NOR Flash and NADN Flash.
  • This memory can be a buffer (called cache) for data exchange.
  • CPU central processing unit
  • the CPU can extract the information from the memory and store it in the flash memory array of the storage device (such as a memory card).
  • the CPU can also extract the information from the flash memory array and store it in the memory.
  • the CPU copies the data to be run in the flash memory array to the memory (such as RAM) for storage; when the system starts to lose power, the CPU copies the data running in the memory (such as RAM) to the flash memory array stored in.
  • FIG. 1 a schematic diagram of a NAND Flash-based storage system is introduced, and the process of storing information from the memory to the flash memory array (NAND Flash medium layer) and from the flash memory array to the memory is introduced.
  • the storage system includes: memory, Host file system layer, Host driver layer, Host device hardware interface layer, Device hardware interface layer, Device command scheduling layer, Device command processing layer, and NAND Flash media layer.
  • memory can be thought of as a buffer in a CPU in an electronic device.
  • the host side can be regarded as the CPU in the electronic device.
  • the device side may be regarded as a controller (processor) in a storage device (such as a memory card) of the electronic device.
  • the NAND Flash medium layer can be regarded as a flash memory array in a memory card.
  • the Host file system layer is mainly responsible for scheduling and processing user operation requests, converting user operation requests into block device requests, sending block device requests to the Host driver layer, and processing the execution results of block device requests returned by the Host driver layer.
  • the Host driver layer is mainly responsible for receiving block device requests issued by the Host file system layer, and converting the block device requests into commands in the format required by the Host and Device interface protocols. The command is sent to the Device device through the hardware interface layer of the Host device, and the command execution result returned by the Device device is processed at the same time.
  • the Host device hardware interface layer and the Device hardware interface layer are mainly responsible for providing a channel for high-speed interaction of commands between the Host and Device.
  • the Device command scheduling layer is mainly responsible for scheduling the commands issued by the Host driver layer and sending them to the Device command processing layer.
  • the Device command processing layer is mainly responsible for processing the commands issued by the Host, and returning the execution results of the commands to the Host.
  • the NAND Flash media layer stores the data carried in the command.
  • requests can also be called commands
  • commands for example, IO write requests and IO read requests.
  • the Host file system layer writes specific data in the memory to the NAND Flash medium through the IO write request.
  • the Host file system layer reads specific data from the NAND Flash medium into the memory through an IO read request.
  • the IO write command includes: the IO write command of the user data (user data) of the file itself, and may also include the IO write command of the node data (node data).
  • These node data (node data) need to wait for the user data (user data) to be written to the flash memory array of the storage device (such as NAND Flash media) before saving the node data (node data) to the flash memory array of the storage device (such as NAND Flash media) .
  • any four IO write commands are IO_W0, IO_W1, IO_W2, and IO_W3 in sequence.
  • IO_W1 and IO_W2 have order protection requirements.
  • the IO_W1 write command must be executed first before the IO_W2 write command can be executed.
  • the order between the other commands No restrictions are imposed.
  • the Host file system layer can wait for delivery between multiple IO write commands that require order preservation. That is, after the execution of an IO write command is completed, and the execution result of the command is returned to the Host file system layer, the Host file system layer issues the next IO write command.
  • the Host file system layer guarantees the execution order of multiple IO write commands that require order preservation through serial execution.
  • serial execution of commands has a long delay, which will affect the performance of the storage system.
  • serial waiting for commands of high-priority services in the storage system will cause the performance of the entire storage system to be poor in scenarios where command order is required.
  • the user experience is poor.
  • this application proposes a technical solution for sending multiple commands in parallel, assigning sequence identifiers to multiple commands, indicating the sequence of execution commands through the sequence identifiers, reducing the execution waiting time of multiple commands, improving the performance of the storage system, and improving user experience.
  • a data processing method including the following steps:
  • Step 201 The first device acquires multiple first commands.
  • the first command here is the command itself, and "first” is for the convenience of distinguishing it from the subsequent second command.
  • the second command is a packaged command, for example, the first command has been format-converted.
  • the second command includes the command itself (that is, the first command) and the sequence identifier assigned to the command itself (that is, the first command) (assignment and addition can be replaced with each other).
  • the first command may be an IO command or an RPMB command.
  • the first command includes a write command and/or a read command.
  • IO write command and/or IO read command For example, the write command (first command) is used to write the data in the memory (the memory on the first device side) into the flash memory array (the flash memory array on the second device side), and the read command is used to read the data in the flash memory array. fetched into memory.
  • the plurality of first commands obtained may be that all the first commands have no protection requirements; it may also be that all the first commands have order preservation requirements; it may also be that some (at least two) first orders have order preservation requirements , part of the First Order does not require order.
  • the four first commands obtained are: IO_W0, IO_W1, IO_W2, IO_W3.
  • IO_W1 and IO_W2 have order preservation requirements.
  • the IO_W1 command must be executed first before the IO_W2 command can be executed, and the order of other commands is not carried out. limit.
  • the type of the command may be a write command for user data or a write command for node data.
  • the plurality of first commands include: a write command to user data and a write command to node data, where the node data is used to indicate a location where the user data is stored.
  • the execution order of the write command to node data needs to be after the execution order of the write command to user data, that is, the user data (user data) command is executed first, and then the node data (node data) command is executed. Order.
  • step 201 may be executed at the Host file system layer, or at the Host driver layer.
  • Step 202 The first device encapsulates the first command to obtain a second command.
  • the command before encapsulation is called the first command
  • the command after encapsulation is called the second command.
  • the encapsulation may also be called an encapsulation command format, and the encapsulation includes performing format conversion, and the converted format (that is, the format of the second command) satisfies the communication protocol between the first device and the second device .
  • the encapsulation further includes adding a sequence identifier to the target commands, and the sequence identifier is used to indicate The execution order of the target commands.
  • the encapsulating further includes: adding a sequence identifier to a first command in the plurality of first commands except the target command. That is, the first device may only add sequence identifiers to the target commands that require order preservation, and optionally, may also add sequence identifiers to the first commands that do not require order preservation.
  • the sequence identifiers of the first commands (with no order preservation requirement) other than the target command are not limited, and may be the same or different.
  • the first device can identify which commands among the multiple first commands are first commands with order preservation requirements (for ease of distinction, the first commands with order preservation requirements are referred to as target commands), and which commands are not First order with order preservation requirements.
  • the first device may determine which commands have order preservation requirements according to the command types, for example, user data (user data) commands and node data (node data) commands have order preservation requirements. For example, execute the user data (user data) command first, and then execute the node data (node data) command.
  • commands have order preservation requirements according to the command types, for example, user data (user data) commands and node data (node data) commands have order preservation requirements. For example, execute the user data (user data) command first, and then execute the node data (node data) command.
  • the first device may determine which commands have order preservation requirements according to the priorities of the commands.
  • the priority of commands can be reflected by the command type.
  • commands for user data (user data) and commands for node data (node data) have order preservation requirements.
  • the priority of a command may also be reflected by a priority identifier.
  • a command with a priority identifier has an order preservation requirement.
  • the priority of commands can also be reflected by services. For example, commands of a certain service and commands of another service have order preservation requirements.
  • the first device may also determine the execution order requirements of the target commands in the first command according to the priority. For example, the execution sequence of target commands with higher priority is first, and the execution sequence of target commands with lower priority is last.
  • the first device when the first device acquires the multiple first commands, it may also acquire an order-preserving flag command (flag); the order-preserving flag command (flag) is used to indicate: The execution order of the first command before (flag) is earlier than the execution order of the first command next to the order-preserving flag command (flag) (the first first command after the order-preserving flag command).
  • the order-preserving flag command is used to indicate: The execution order of the first command before (flag) is earlier than the execution order of the first command next to the order-preserving flag command (flag) (the first first command after the order-preserving flag command).
  • the first device can identify which commands have order preservation requirements through the order preservation flag command, for example, the first command to be obtained before the order preservation flag command (flag), and the order preservation flag command (flag)
  • the first first command obtained later is determined to be the target command with order preservation requirements.
  • IO_W0, IO_W1 flag, IO_W2, IO_W3, IO_W0, IO_W1, IO_W2 may be determined as target commands, and the execution sequence of IO_W0, IO_W1 is located before the execution sequence of IO_W2.
  • IO_W3 There is no restriction on the execution order of IO_W3 and several other commands.
  • IO_W1 when the sequence of commands acquired by the first device is: IO_W1, flag, IO_W2, IO_W0, IO_W3, IO_W1 and IO_W2 may be determined as target commands, and the execution sequence of IO_W1 is before the execution sequence of IO_W2.
  • IO_W0 and IO_W3 There is no restriction on the execution sequence between IO_W0 and IO_W3, and there is no restriction on the execution sequence of IO_W0, IO_W3 and several other commands.
  • IO_W0 when the sequence of commands acquired by the first device is: IO_W0, flag, IO_W3, IO_W1, flag, IO_W2, IO_W0, IO_W3, IO_W1, IO_W2 can be determined as target commands, and the execution sequence of IO_W0 is before the execution sequence of IO_W3 , and the execution sequence of IO_W0, IO_W3, IO_W1 is before the execution sequence of IO_W2.
  • the sequence identifier includes a serial number (serial number, SN), and the execution sequence of the plurality of first commands can be represented by a numerical value of the serial number.
  • the execution order of commands with small serial numbers is earlier than the execution order of commands with large serial numbers.
  • the execution order of commands with small serial numbers is later than that of commands with large serial numbers, that is, the execution order of commands with large serial numbers is smaller than that of commands with small serial numbers.
  • the sequence identifier may be a, b, c, A, B, C, etc.
  • the first device When the first device assigns sequence numbers SN to the multiple first commands, it may be:
  • the sequence number assigned to the target command (the first command) that needs to be executed in the first order is greater than the sequence number allocated to the target command (the first command) that needs to be executed in the later order (that is, the sequence number that needs to be executed later). Execute, the one with the smaller serial number will be executed later). There is no limit to the size of the sequence number assigned to the first command that does not require order preservation.
  • the order of priority from high to low and sequence number from large to small can be: Sequence numbers assigned to multiple first commands; that is, a higher sequence number is assigned to a first command with a higher priority, and a smaller sequence number is assigned to a first command with a lower priority.
  • the serial number assigned to the write command to node data is greater than the serial number assigned to the write command to user data.
  • sequence number added to the first command obtained before the sequence-preserving identification command is different from the sequence number added to the first first command obtained after the sequence-preserving identification command.
  • sequence number added to the command obtained before the sequence-preserving flag command is greater than the sequence number added to the first command obtained after the sequence-preserving flag command.
  • the third command is the third command, .
  • the serial number assigned to the first command that needs to be executed in the first order is smaller than the serial number assigned to the first command that needs to be executed in the later order (that is, the one with the smaller serial number is executed first. , execute after the one with the larger serial number).
  • the size of the sequence number assigned to the first command that does not require order preservation is no limit.
  • sequence numbers assigned to multiple first commands are assigned in order of priority from high to low and sequence numbers from small to large; that is, the sequence numbers assigned to the first commands with higher priority are small, which is the priority
  • the first command of the lower level is assigned a higher sequence number.
  • a sequence number assigned to a write command to node data is smaller than a sequence number assigned to a write command to user data.
  • sequence number added to the command obtained before the sequence-preserving flag command is smaller than the sequence number added to the first command obtained after the sequence-preserving flag command.
  • the third command is smaller than the sequence number added to the first command obtained after the sequence-preserving flag command.
  • the target command is: among the plurality of first commands, there is an order preservation requirement, and for other first commands that do not have order preservation requirements, the added sequence numbers are not limited.
  • the four first commands are: IO_W0, IO_W1, IO_W2, and IO_W3.
  • IO_W1 and IO_W2 have order preservation requirements.
  • the IO_W1 command must be executed first before the IO_W2 command can be executed.
  • the order of other commands is not limited.
  • serial number SN assigns the serial number SN to the four first commands: for example, IO_W0_SNx, IO_W1_SNx, IO_W2_SNx+1, IO_W3_SNx; another example, IO_W0_SNx, IO_W1_SNx, IO_W2_SNx+1 , IO_W3_SNx+1; another example, IO_W0_SNx, IO_W1_SNx, IO_W2_SNx+2, IO_W3_SNx+1, etc.
  • IO_W0_SNx is smaller than the serial number of IO_W2.
  • IO_W0 and IO_W3 may also not be assigned a serial number SN.
  • step 202 may be executed by the Host driver layer.
  • Step 203 the first device sends multiple second commands in parallel.
  • the second device receives multiple second commands in parallel.
  • the time required to send multiple commands in parallel is less than a set threshold, which is much shorter than the time to send multiple commands serially (serial sending that needs to wait for processing results).
  • Send multiple commands in parallel can also be understood as sending the next command without waiting for the processing result of the previous command.
  • Parallel sending can also be understood as serial sending without waiting for processing results.
  • sending 4 commands serially includes: sending command 1 first; sending command 2 after receiving the processing result of command 1; sending command 3 after receiving the processing result of command 2; After processing the result of 3, send command 4 again. If the sending time intervals of command 1 and command 2, command 2 and command 3, command 3 and command 4 are all 10s, then it takes 30s to send 4 commands serially.
  • Sending 4 commands in parallel includes: when sending a command, there is no need to consider whether the previous command has received the processing result. For example, send command 1 first, and send command 2 regardless of whether the processing result of command 1 is received; send command 3 regardless of whether the processing result of command 2 is received; regardless of whether the processing result of command 3 is received As a result, command 4 is sent. Sending these 4 commands in parallel takes a total of 10s. Alternatively, the order of the four commands is not limited, and may be sent in any order (for example, out of order).
  • the second device when receiving 4 commands in parallel, it may receive command 1, command 2, command 3, and command 4 in sequence; it may also receive command 1, command 2, command 3, and command 4 out of sequence. . That is, the first device may send multiple second commands out of order, and the second device may receive multiple second commands out of order.
  • the out-of-order here is relative to the order in which the first device acquires multiple first commands.
  • the acquisition sequences are command 1, command 2, command 3, and command 4 respectively.
  • the order in which the first device sends the second commands is: command 1, command 3, command 4, and command 2. This situation can be understood as sending the second command out of order.
  • the first device when the first device sends multiple second commands in parallel, it may send multiple second commands in parallel in one thread, or send multiple second commands in parallel in multiple threads.
  • step 203 may be performed at the Host hardware interface layer and at the Device hardware interface layer.
  • Step 204 After receiving a plurality of second commands, the second device decapsulates the second commands, and the decapsulation includes parsing the first commands included in the second commands and adding sequence identifier.
  • the order identifier is used to indicate the execution order of commands with order preservation requirements. Based on the above introduction, it can be seen that when adding sequence identifiers, it may be that all first commands have added sequence identifiers, and then all second commands can be parsed to obtain sequence identifiers. It may also be that some of the first commands have added sequence identifiers, and some of the first commands have not added sequence identifiers, then some of the second commands can parse out the sequence identifiers, and another part of the second commands cannot parse out the sequence identifiers.
  • sequence identifier is used to indicate the execution sequence of the first command.
  • sequence identifiers can be parsed in the command domain segment.
  • step 204 may be performed by the Device command scheduling layer.
  • Step 205 The second device schedules the multiple first commands according to the sequence identifier, and further executes the multiple first commands sequentially according to the scheduling result.
  • the second device schedules the multiple first commands serially according to the sequence identifier. For example, command 1 is scheduled first, but after the processing result of command 1 is received, command 2 is then scheduled, and after the processing result of command 2 is received, command 3 is then scheduled.
  • the second device may first analyze whether the command (command field segment of the command) includes a sequence identifier. If the sequence identifier is not included in the parsed command (or the sequence identifier cannot be parsed), the commands may be executed in the order received. If it is parsed out that the command includes the sequence identifier, the command can be executed according to the sequence identifier.
  • the execution sequence is not limited.
  • the four first commands are: IO_W0, IO_W1, IO_W2, and IO_W3.
  • IO_W1 and IO_W2 have order preservation requirements.
  • the IO_W1 command must be executed first before the IO_W2 command can be executed.
  • the order of other commands is not limited. It is stipulated that the one with the smaller serial number is executed first, and the one with the larger serial number is executed later.
  • the second device receives four commands in sequence, which are IO_W0, IO_W1_SNx, IO_W2_SNx+1, and IO_W3.
  • the scheduling sequence of the second device for IO_W1 and IO_W2 is: first schedule IO_W1, then schedule IO_W2, and the scheduling sequence of IO_W0 and IO_W3 is different. To limit.
  • scheduling is performed sequentially according to the receiving order, that is, IO_W0, IO_W1, IO_W2, and IO_W3 are scheduled sequentially.
  • the commands with sequence identifiers are scheduled first, for example, IO_W1, IO_W2, IO_W0, and IO_W3 are scheduled sequentially.
  • commands with sequence identifiers are scheduled last, for example, IO_W0, IO_W3, IO_W1, and IO_W2 are scheduled sequentially.
  • the second device After the second device executes a certain first command, it may return the processing result of the first command to the first device.
  • This application does not limit the process of returning the processing results.
  • the first device sends multiple first commands serially (serial sending that needs to wait for the processing result), for example, it sends command 1 first, and then sends command 2 after receiving the processing result of command 1.
  • the second device if the second device is in the process of feeding back the processing result of command 1 to the first device after processing command 1, the second device still has the ability to continue processing the command, but the first device still waits for the processing result of command 1.
  • Command 2 is not sent to the second device, then the idle time of the second device is wasted.
  • the first device sends command 2 to the second device the second device may be overloaded or for other reasons, unable to process command 2 in time, then command 2 needs to continue to wait to be processed, and multiple first commands are processed. Processing time is extended.
  • the first device sends multiple second commands (including the first command and the sequence identifier corresponding to the first command) to the second device in parallel, and the second device can sequentially execute multiple first commands according to the sequence identifier.
  • the commands are scheduled to execute the plurality of first commands sequentially. Not only can the execution sequence of multiple first commands be guaranteed, but also the second device can reasonably use its own idle time to process multiple first commands in time, reduce the execution waiting time of multiple first commands, improve the performance of the storage system, and improve the user experience. experience.
  • the first device includes: a driver layer and a first interface layer.
  • it also includes: a file system layer.
  • the file system layer is, for example, the Host file system layer in Figure 1
  • the driver layer is, for example, the Host driver layer in Figure 1
  • the first interface layer is, for example, Figure 1 In the Host hardware interface layer.
  • the first device obtains a plurality of first commands
  • the driver layer may obtain a plurality of first commands.
  • the obtaining method is to receive multiple first commands from the file system layer. It may also be: the file system layer acquires multiple first commands.
  • the first device encapsulates the first command, which may be: the driver layer encapsulates the first command.
  • the file system layer sends the multiple first commands to the driver layer.
  • the file system layer may also send the multiple first commands and an order-preserving flag command (flag) to the driver layer according to the execution sequence of the multiple first commands, corresponding
  • the driver layer obtains a plurality of first commands and the sequence-preserving flag command (flag) from the file system layer; the sequence-preserving flag command (flag) is used to indicate: the The execution sequence of the first command is earlier than the execution sequence of the next first command of the sequence-preserving flag command (flag).
  • the order-preserving flag command (flag) is sent between any two target commands, and there is no difference between the order-preserving flag command (flag) and the target command that is sent later in the two target commands.
  • the target command is: a command with an order preservation requirement among the plurality of first commands.
  • IO_W1 and IO_W2 have order preservation requirements (that is, IO_W1 and IO_W2 are two target commands), for example, the IO_W1 command must be executed before the IO_W2 command can be executed, and the order of other commands is not limited.
  • the order in which the file system layer sends the four first commands and the order-preserving identification command to the driver layer includes but is not limited to any of the following:
  • IO_W1 is located before IO_W2, and the adjacent command after the flag is IO_W2.
  • IO_W0, IO_W1, and IO_W2 have order-preserving requirements (that is, IO_W0, IO_W1, and IO_W2 are three target commands). For example, the IO_W1 command must be executed first, then the IO_W1 command must be executed, and then the IO_W2 command must be executed. The order is not limited.
  • the order in which the file system layer sends the four first commands and the order-preserving identification command to the driver layer includes but is not limited to any of the following:
  • IO_W0 flag, IO_W1, flag, IO_W2, IO_W3; or, IO_W0, IO_W3, flag, IO_W1, flag, IO_W2; or, IO_W0, flag, IO_W1, flag, IO_W3, IO_W2, IO_W0, IO_W3, etc.
  • IO_W0 is located before IO_W1, IO_W1 is located before IO_W2, and the adjacent command after one flag is IO_W1, and the adjacent command after another flag is IO_W2.
  • the first device sends multiple second commands in parallel, which may be: the first interface layer sends multiple second commands in parallel.
  • the first interface layer sends multiple second commands in parallel.
  • the second device includes: a second interface layer, a command scheduling layer, and optionally, a command processing layer.
  • the second interface layer is, for example, the Device hardware interface layer in Figure 1
  • the command scheduling layer is, for example, the Device command scheduling layer in Figure 1
  • the command processing layer is, for example, It is the Device command processing layer in Figure 1.
  • the second device receives multiple second commands in parallel, which may be: the second interface layer receives multiple second commands in parallel.
  • the second interface layer sends multiple second commands to the command scheduling layer in parallel.
  • step 204 after receiving multiple second commands, the second device decapsulates the second commands, and it may be that the command scheduling layer decapsulates the second commands.
  • the second device schedules the multiple first commands according to the sequence identifier, which may be: the command scheduling layer schedules the multiple first commands according to the sequence identifier corresponding to each first command The first command is scheduled.
  • Scheduling the multiple first commands may be understood as sending the multiple first commands to the command processing layer in series.
  • Sending the first command to the command processing layer serially can be understood as sending the next first command to the command processing layer after receiving the processing result of the first command.
  • step 205 the second device sequentially executes the multiple first commands according to the scheduling result, which may be: the command processing layer receives and executes the first command from the command scheduling layer.
  • the commands sent by the command dispatching layer to the command processing layer do not carry sequence identifiers (such as serial numbers), and the commands sent by the command processing layer to the Flash medium layer do not carry sequence identifiers (such as sequence numbers).
  • FIG. 3 a schematic diagram of a storage system based on NAND Flash is provided.
  • the storage system is newly added: function 1 (optional), function 2 and function 3. Similarities with FIG. 1 will not be repeated here.
  • the order preservation flag command can be issued to the Host driver layer through function 1.
  • the existing commands issued by the host file system layer to the host driver layer can make the host driver layer recognize that the order of the commands needs to be preserved, but function 1 does not need it.
  • the first command issued by the Host file system layer to the Host driver layer includes node data commands and user data commands, and the Host driver layer can distinguish that there is an order preservation requirement between these two types of first commands. The file system layer no longer needs to send the sequence-preserving identification command to the Host driver layer.
  • the Host file system layer obtains four first commands, which are IO_W0, IO_W1, IO_W2, and IO_W3.
  • IO_W1 and IO_W2 have order preservation requirements.
  • the IO_W1 command must be executed first before the IO_W2 command can be executed.
  • the order is not limited.
  • the file system order preservation function can issue the order preservation flag between the IO_W1 command and the IO_W2 command that needs to be preserved, so as to notify the Host driver layer that the order needs to be preserved between the IO_W1 command and the IO_W2 command.
  • the order in which the file system order preservation function sends the four first commands and the order preservation identification command flag to the Host driver layer may be: IO_W0, IO_W1, flag, IO_W2, IO_W3.
  • the sequence identification of the maintenance command is driven by the sequence preservation processing function.
  • the sequence identification (such as the initial value of the sequence number) maintained by the Host driver layer and the Device command scheduling layer is fixed or negotiated with each other.
  • the driver order preserving processing function assigns sequence identifiers (such as serial number values) to multiple first commands (such as IO write commands).
  • the drive sequence preservation processing function receives multiple first commands issued by the Host file system layer, and assigns corresponding serial numbers to the multiple first commands according to preset serial number value rules. For example, the sequence number assigned to the first received IO_W0 command is SNx, the sequence number assigned to the second received IO_W1 command is SNx, and the sequence number assigned to the third received IO_W2 command is SNx.
  • the drive order preservation processing function receives the order preservation flag command (flag) issued by the Host file system layer after receiving the IO_W1 command, and receives the IO_W2 command after the order preservation flag command (flag), then the preservation The serial number value of the next command (that is, the IO_W2 command) of the sequence flag command is changed according to certain rules, so as to reflect that the execution order of the next command (that is, the IO_W2 command) of the sequence flag command should be ranked before the sequence flag command (flag ) behind the previous command.
  • the value of the serial number can be increased by 1, and the serial number assigned to the IO_W2 command is SNx+1.
  • the value of the serial number can be subtracted by 1, and the serial number assigned to the IO_W2 command is SNx-1.
  • the sequence number may not be added, or the sequence may be added. If a serial number is added, there is no limitation on the size of the serial number, for example, the added serial numbers are SNx+1, SNx, SNx-1, and SNx+2.
  • serial number change rules of the driver sequence preservation processing function of the Host driver layer and the serial number change rules of the Device command scheduling layer are fixed or known through mutual negotiation.
  • the host driver layer and the device command scheduling layer fix the initial value of the sequence number from 1, and increase by 1 in turn.
  • the Host driver layer encapsulates the command structure for IO_W0 and IO_W1.
  • the command domain segment adds the serial number SN as x, because the order-preserving identification command (flag) is received, Therefore, add 1 to the serial number SN maintained by the Host driver layer, add SN to the command domain segment of IO_W2 received subsequently as x+1, and add SN to the command domain segment of IO_W3 received is arbitrary, for example, add the serial number to SNx+ 1, get IO_W3_SNx+1.
  • the driver sequence processing function sends four second commands (respectively IO_W0_SNx, IO_W1_SNx, IO_W2_SNx+1, IO_W3_SNx+1) to the Device command scheduling layer through the Host device hardware interface layer and the Device hardware interface layer.
  • the sending order of the four second commands can be arbitrary. Since the second command includes a serial number, the Device command scheduling layer can schedule the first commands sequentially according to the serial numbers to meet the requirements of the first command. order protection requirements.
  • the Device command scheduling layer receives four commands, IO_W0_SNx, IO_W1_SNx, IO_W2_SNx+1, and IO_W3_SNx+1, delivered by the Host driver layer. It may happen that IO_W2_SNx+1 is received first, and then IO_W1_SNx is received, then the command sequence processing function will sort IO_W1_SNx and IO_W2_SNx+1 according to the serial number SN from small to large.
  • the command sequence processing function restores the four second commands: IO_W0_SNx, IO_W1_SNx, IO_W2_SNx+1, IO_W3_SNx+1 to the first commands obtained by the Host file system layer: IO_W0, IO_W1, IO_W2, IO_W3, and converts these first commands Send it to the Device command processing layer in the order of the serial number, and the Device command processing layer will specifically process the first command, and finally write the data into the NAND FLASH medium layer.
  • the first command sent by the Host command scheduling layer to the Host command processing layer does not carry a serial number
  • the first command sent by the Host processing layer to the NAND FLASH medium layer does not carry a serial number
  • the method in the embodiment of the present application is introduced above, and the device in the embodiment of the present application will be introduced in the following.
  • the method and the device are based on the same technical concept. Since the principles of the method and the device to solve problems are similar, the implementation of the device and the method can be referred to each other, and the repetition will not be repeated.
  • the embodiment of the present application may divide the device into functional modules according to the above method example, for example, each function may be divided into each functional module, or two or more functions may be integrated into one module.
  • These modules can be implemented not only in the form of hardware, but also in the form of software function modules. It should be noted that the division of the modules in the embodiment of the present application is schematic, and is only a logical function division, and there may be another division manner during specific implementation.
  • the device 400 may include: a processing module 410, and optionally, a receiving module 420a, a sending module 420b, and a storage module 430.
  • the processing module 410 may be connected to the storage module 430 and the receiving module 420a and the sending module 420b respectively, and the storage module 430 may also be connected to the receiving module 420a and the sending module 420b.
  • the above-mentioned receiving module 420a and sending module 420b may also be integrated together and defined as a transceiver module.
  • the apparatus 400 may be the first device, or may be a chip or a functional unit applied in the first device.
  • the apparatus 400 has any function of the first device in the above-mentioned method, for example, the apparatus 400 can execute the steps performed by the first device in the above-mentioned methods in FIG. 2 and FIG. 3 .
  • the receiving module 420a may perform the receiving action performed by the first device in the above method embodiments.
  • the sending module 420b may execute the sending action performed by the first device in the above method embodiment.
  • the processing module 410 may perform actions other than the sending action and the receiving action among the actions performed by the first device in the above method embodiments.
  • the storage module 430 may store computer-executed instructions of the method executed by the first device, so that the processing module 410, the receiving module 420a, and the sending module 420b execute the method executed by the first device in the above examples.
  • the storage module may include one or more memories, and the memories may be devices used to store programs or data in one or more devices and circuits.
  • the storage module may be a register, cache or RAM, etc., and the storage module may be integrated with the processing module.
  • the storage module can be ROM or other types of static storage devices that can store static information and instructions, and the storage module can be independent from the processing module.
  • the transceiver module may be an input or output interface, a pin or a circuit, and the like.
  • the apparatus 400 may be the second device, or may be a chip or a functional unit applied in the second device.
  • the apparatus 400 has any function of the second device in the above method, for example, the apparatus 400 can execute the steps performed by the second device in the methods in FIG. 2 and FIG. 3 above.
  • the receiving module 420a may perform the receiving action performed by the second device in the above method embodiments.
  • the sending module 420b may execute the sending action performed by the second device in the above method embodiment.
  • the processing module 410 may perform actions other than the sending action and the receiving action among the actions performed by the second device in the above method embodiments.
  • the storage module 430 may store computer-executed instructions of the method executed by the second device, so that the processing module 410, the receiving module 420a, and the sending module 420b execute the method executed by the second device in the above examples.
  • the storage module may include one or more memories, and the memories may be devices used to store programs or data in one or more devices and circuits.
  • the storage module may be a register, cache or RAM, etc., and the storage module may be integrated with the processing module.
  • the storage module can be ROM or other types of static storage devices that can store static information and instructions, and the storage module can be independent from the processing module.
  • the transceiver module may be an input or output interface, a pin or a circuit, and the like.
  • the above describes the device applied to the first device and the device applied to the second device according to the embodiments of the present application.
  • the following describes possible product forms of the device applied to the first device and the device applied to the second device. It should be understood that any product of any form having the characteristics of the device applied to the first device described in Figure 4 above, and any product of any form having the characteristics of the device applied to the second device, all fall within the scope of protection of this application . It should also be understood that the following introduction is only an example, and should not limit the product form of the device applied to the first device in the embodiment of the present application, and the product form of the device applied to the second device is limited thereto.
  • the device can be realized by a general bus architecture.
  • FIG. 5 a schematic block diagram of a data processing device 500 is provided.
  • the apparatus 500 may include: a processor 510 , and optionally, a communication interface 520 and a memory 530 .
  • the communication interface 520 may be used to receive programs or instructions and transmit them to the processor 510, or the communication interface 520 may be used for the apparatus 500 to communicate and interact with other communication devices, such as interactive control signaling and/or service data etc.
  • the communication interface 520 may be a code and/or data read/write communication interface, or the communication interface 520 may be a signal transmission communication interface between the processor and the transceiver.
  • the processor 510 is electrically coupled to the memory 530 .
  • the apparatus 500 may be the first device, or may be a chip applied in the first device. It should be understood that the apparatus has any function of the first device in the above method, for example, the apparatus 500 can execute the steps performed by the first device in the above methods in FIG. 2 and FIG. 3 .
  • the memory 530 is used to store computer programs; the processor 510 can be used to call the computer programs or instructions stored in the memory 530 to execute the method performed by the first device in the above examples, or to use the
  • the communication interface 520 executes the method executed by the first device in the above example.
  • the apparatus 500 may be the second device, or may be a chip applied in the second device. It should be understood that the apparatus has any function of the second device in the above method, for example, the apparatus 500 can execute the steps performed by the second device in the above methods in FIG. 2 and FIG. 3 .
  • the memory 530 is used to store computer programs; the processor 510 can be used to call the computer programs or instructions stored in the memory 530 to execute the method performed by the second device in the above examples, or to use the
  • the communication interface 520 executes the method executed by the second device in the above example.
  • the processing module 410 in FIG. 4 may be implemented by the processor 510 .
  • the receiving module 420a and the sending module 420b in FIG. 4 can be implemented through the communication interface 520 .
  • the communication interface 520 is divided into a receiver and a transmitter, the receiver performs the function of the receiving module, and the transmitter performs the function of the sending module.
  • the storage module 430 in FIG. 4 may be implemented by the memory 530 .
  • the device may be realized by a memory controller (the memory controller may also be called a chip or a chip system).
  • the storage controller includes: a processor, and a communication interface coupled to the processor;
  • the processing module 410 in FIG. 4 may be implemented by a processor.
  • the receiving module 420a and the sending module 420b in FIG. 4 can be implemented through a communication interface.
  • the input-output interface is divided into an input interface and an output interface, the input interface performs the function of the receiving module, and the output interface performs the function of the sending module.
  • the storage module 430 in FIG. 4 may be implemented by a storage medium.
  • the communication interface is configured to: receive multiple second commands in parallel;
  • the processor is configured to: decapsulate the second command, where the decapsulation includes parsing the first command included in the second command and a sequence identifier, where the sequence identifier is used to indicate the The execution sequence of the commands; scheduling multiple first commands according to the sequence identifier.
  • the sequence identifier is a sequence number; when the processor is used to schedule multiple first commands according to the sequence identifier, it is specifically configured to:
  • the device may be implemented by flash memory, which includes the storage controller described above and a flash memory array;
  • the storage controller is configured to: schedule the first command to access the flash memory array.
  • the device of the embodiment of the present application can also be realized using the following: one or more FPGAs (Field Programmable Gate Arrays), PLDs (Programmable Logic Devices), controllers, state machines, Any combination of gate logic, discrete hardware components, any other suitable circuitry, or circuitry capable of performing the various functions described throughout this application.
  • FPGAs Field Programmable Gate Arrays
  • PLDs Programmable Logic Devices
  • controllers state machines, Any combination of gate logic, discrete hardware components, any other suitable circuitry, or circuitry capable of performing the various functions described throughout this application.
  • the embodiment of the present application also provides a computer-readable storage medium storing a computer program, and when the computer program is executed by a computer, the computer can be used to execute the above-mentioned data processing method.
  • the computer program includes instructions for implementing the above data processing method.
  • the embodiment of the present application also provides a computer program product, including: computer program code, when the computer program code is run on the computer, the computer can execute the data processing method provided above.
  • An embodiment of the present application further provides a data processing system, where the system includes: a first device and a second device for executing the above data processing method.
  • processors mentioned in the embodiment of the present application may be a central processing unit (central processing unit, CPU), a baseband processor, and the baseband processor and the CPU may be integrated or separated, or may be a network processor (network processing unit).
  • processor NP
  • processors may further include hardware chips or other general-purpose processors.
  • the aforementioned hardware chip may be an application-specific integrated circuit (application-specific integrated circuit, ASIC), a programmable logic device (programmable logic device, PLD) or a combination thereof.
  • the above PLD can be complex programmable logic device (complex programmable logic device, CPLD), field programmable logic gate array (field-programmable gate array, FPGA), general array logic (generic array logic, GAL) and other programmable logic devices , discrete gate or transistor logic devices, discrete hardware components, etc., or any combination thereof.
  • CPLD complex programmable logic device
  • FPGA field programmable logic gate array
  • GAL general array logic
  • GAL generator array logic
  • a general-purpose processor may be a microprocessor, or the processor may be any conventional processor, or the like.
  • the memory mentioned in the embodiments of the present application may be a volatile memory or a nonvolatile memory, or may include both volatile and nonvolatile memories.
  • the non-volatile memory can be read-only memory (Read-Only Memory, ROM), programmable read-only memory (Programmable ROM, PROM), erasable programmable read-only memory (Erasable PROM, EPROM), electronically programmable Erase Programmable Read-Only Memory (Electrically EPROM, EEPROM) or Flash.
  • the volatile memory can be Random Access Memory (RAM), which acts as external cache memory.
  • RAM Static Random Access Memory
  • SRAM Static Random Access Memory
  • DRAM Dynamic Random Access Memory
  • Synchronous Dynamic Random Access Memory Synchronous Dynamic Random Access Memory
  • SDRAM double data rate synchronous dynamic random access memory
  • Double Data Rate SDRAM DDR SDRAM
  • enhanced SDRAM ESDRAM
  • Synchlink DRAM SLDRAM
  • Direct Memory Bus Random Access Memory Direct Rambus RAM, DR RAM
  • the transceiver mentioned in the embodiment of the present application may include a separate transmitter and/or a separate receiver, or the transmitter and the receiver may be integrated. Transceivers can operate under the direction of corresponding processors.
  • the transmitter may correspond to the transmitter in the physical device, and the receiver may correspond to the receiver in the physical device.
  • the disclosed systems, devices and methods may be implemented in other ways.
  • the device embodiments described above are only illustrative.
  • the division of the units is only a logical function division. In actual implementation, there may be other division methods.
  • multiple units or components can be combined or May be integrated into another system, or some features may be ignored, or not implemented.
  • the mutual coupling or direct coupling or communication connection shown or discussed may be indirect coupling or communication connection through some interfaces, devices or units, and may also be electrical, mechanical or other forms of connection.
  • each functional unit in each embodiment of the present application may be integrated into one processing unit, each unit may exist separately physically, or two or more units may be integrated into one unit.
  • the above-mentioned integrated units can be implemented in the form of hardware or in the form of software functional units.
  • the integrated unit is realized in the form of a software function unit and sold or used as an independent product, it can be stored in a computer-readable storage medium.
  • the technical solution of the present application is essentially or the part that contributes to the prior art, or all or part of the technical solution can be embodied in the form of software products, and the computer software products are stored in a storage medium
  • several instructions are included to make a computer device (which may be a personal computer, a server, or a network device, etc.) execute all or part of the steps of the methods described in the various embodiments of the present application.
  • the aforementioned storage medium includes: U disk, mobile hard disk, read-only memory (read-only memory, ROM), random access memory (random access memory, RAM), magnetic disk or optical disc and other media that can store program codes. .

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Abstract

本申请涉及数据存储技术领域，公开了一种数据处理方法及装置，保证多个命令之间的执行顺序。首先，第一设备获取多个第一命令。然后，第一设备对第一命令进行封装，得到第二命令，封装包括为具有保序要求的目标命令添加顺序标识。接下来，第一设备并行发送多个第二命令。第二设备并行接收多个第二命令，对第二命令解封装，然后根据顺序标识对多个第一命令进行调度。第一设备将多个第二命令并行发送给第二设备，第二设备通过顺序标识可以保证多个第一命令的执行顺序，还可以合理利用自身的空闲时间，及时处理多个第一命令，减少多个第一命令的执行等待时间，提高存储系统性能。

Description

一种数据处理方法及装置 技术领域
本申请实施例涉及数据存储领域，尤其涉及一种数据处理方法及装置。
背景技术
用户的操作行为(例如应用程序操作、下载图片、网聊等)，可以理解为对文件系统进行操作，例如对文件(即数据)的读取和保存，文件系统将这些用户操作行为转化为IO读、IO写等命令。
在某些场景下，多个命令之间有保序要求，如何保证多个命令之间的执行顺序，是需要解决的技术问题。
发明内容
本申请实施例提供一种数据处理方法及装置，用以保证多个命令之间的执行顺序。
第一方面，提供了一种数据处理方法，首先，第一设备获取多个第一命令。然后，所述第一设备对所述第一命令进行封装，得到第二命令，其中，在所述多个第一命令包括至少两个具有保序要求的目标命令的情况下，所述封装包括为所述目标命令添加顺序标识，所述顺序标识用于指示所述目标命令的执行顺序。接下来，所述第一设备并行发送多个第二命令。
可选的，所述封装还包括格式转换，转换后的格式满足第一设备与第二设备之间的协议。
第一方面中，第一设备将多个第二命令(包括第一命令及所述第一命令对应的顺序标识)并行发送给第二设备，第二设备可以根据顺序标识依次对多个第一命令进行调度，依次执行多个第一命令。不但可以保证多个第一命令的执行顺序，而且第二设备可以合理利用自身的空闲时间，及时处理多个第一命令，减少多个第一命令的执行等待时间，提高存储系统性能，提高用户体验。
在一种可能的实现中，所述第一命令为IO命令。
在一种可能的实现中，任一所述第一命令为：对用户数据的写命令或对节点数据的写命令，所述节点数据用于指示所述用户数据所存储的位置。
在一种可能的实现中，所述对节点数据的写命令的执行顺序在所述对用户数据的写命令的执行顺序之前。可以理解为该数据处理方法应用于flash友好文件系统(flash friendly file system，F2FS)。
在一种可能的实现中，所述第一命令用于将数据从内存(第一设备侧的内存)写入闪存阵列(第二设备侧的闪存阵列)中。
在一种可能的实现中，所述顺序标识为序列号，通过所述序列号的数值大小指示命令的执行顺序。
例如，序列号小的命令的执行顺序早于序列号大的命令的执行顺序，或者序列号大的命令的执行顺序早于序列号小的命令的执行顺序。
在一种可能的实现中，第一设备还可以获取保序标识命令，所述保序标识命令用于指 示：位于所述保序标识命令前面的命令的执行顺序早于所述保序标识命令的下一个命令(位于所述保序标识命令后面的首个命令)的执行顺序。进一步，可以将在所述保序标识命令之前获取到的第一命令和在所述保序标识命令之后获取到的首个命令，确定为目标命令。
在一种可能的实现中，第一设备为在所述保序标识命令之前获取到的第一命令添加的序列号，与为在所述保序标识命令之后获取到的首个第一命令添加的序列号不同。
例如，第一设备为在所述保序标识命令之前获取到的第一命令添加的序列号、小于为在所述保序标识命令之后获取到的首个第一命令添加的序列号。或者，第一设备为在所述保序标识命令之前获取到的第一命令添加的序列号、大于为在所述保序标识命令之后获取到的首个第一命令添加的序列号。
在一种可能的实现中，所述第一设备并行地、乱序地发送多个所述第二命令。
在一种可能的实现中，所述封装还包括：为所述多个第一命令中的除所述目标命令外的第一命令添加顺序标识。
第二方面，提供了一种数据处理方法，第二设备并行接收多个第二命令。然后，对所述第二命令解封装，所述解封装包括解析所述第二命令包括的第一命令和顺序标识，所述顺序标识用于指示具有保序要求的命令的执行顺序。接下来，所述第二设备根据所述顺序标识，对所述多个第一命令进行调度。
第二方面中，第二设备并行地接收多个第二命令，在解析出顺序标识后，第二设备可以根据顺序标识依次对多个第一命令进行调度，依次执行多个第一命令。不但可以保证多个第一命令的执行顺序，而且第二设备可以合理利用自身的空闲时间，及时处理多个第一命令，减少多个第一命令的执行等待时间，提高存储系统性能，提高用户体验。
在一种可能的实现中，所述顺序标识为序列号；所述第二设备可以按照所述序列号的数值大小，调度多个所述第一命令。
在一种可能的实现中，所述第二设备并行地、乱序地接收多个第二命令。
第三方面，提供了一种数据处理装置，所述装置具有实现上述第一方面及第一方面任一可能的实现中的功能。这些功能可以通过硬件实现，也可以通过硬件执行相应的软件实现。所述硬件或软件包括一个或多个与上述功能相对应的功能模块。
在一种可能的实现中，所述数据处理装置包括：文件系统层、驱动层、第一接口层。
所述文件系统层，用于获取多个第一命令。或者，所述驱动层，用于获取多个第一命令。可以理解的是，所述文件系统层在获取到多个第一命令后，向所述驱动层发送所述多个第一命令。
所述驱动层，用于对所述第一命令进行封装，得到第二命令，其中，在所述多个第一命令包括至少两个具有保序要求的目标命令的情况下，所述封装包括为所述目标命令添加顺序标识，所述顺序标识用于指示所述目标命令的执行顺序。
所述第一接口层，用于并行发送多个所述第二命令。
在一种可能的实现中，所述文件系统层还可以向所述驱动层发送保序标识命令(flag)；相应的，所述驱动层，还用于从所述文件系统层获取保序标识命令。所述保序标识命令(flag)用于指示：位于所述保序标识命令(flag)前面的第一命令的执行顺序早于，所述保序标 识命令(flag)的下一个第一命令(位于所述保序标识命令后面的首个命令)的执行顺序。可选的，所述保序标识命令(flag)在任意的两个目标命令之间发送，且所述保序标识命令(flag)与所述两个目标命令中发送时间靠后的所述目标命令之间不存在其它命令。
所述驱动层，还用于将在所述保序标识命令之前获取到的第一命令和在所述保序标识命令之后获取到的首个命令，确定为目标命令。
在一种可能的实现中，所述驱动层为在所述保序标识命令之前获取到的第一命令添加的序列号，与为在所述保序标识命令之后获取到的首个第一命令添加的序列号不同。
在一种可能的实现中，所述第一接口层并行地、乱序地发送多个所述第二命令。
在一种可能的实现中，所述封装还包括：为所述多个第一命令中的除所述目标命令外的第一命令添加顺序标识。
第四方面，提供了一种数据处理装置，所述装置具有实现上述第二方面及第二方面任一可能的实现中的功能。这些功能可以通过硬件实现，也可以通过硬件执行相应的软件实现。所述硬件或软件包括一个或多个与上述功能相对应的功能模块。
在一种可能的实现中，所述数据处理装置包括：第二接口层，命令调度层。
所述第二接口层，用于并行接收多个第二命令。
所述命令调度层，用于对所述第二命令解封装，所述解封装包括解析所述第二命令包括的第一命令和顺序标识，所述顺序标识用于指示具有保序要求的命令的执行顺序；根据所述顺序标识，对所述多个第一命令进行调度。
第五方面，提供了一种数据处理装置，包括处理器，可选的，还包括存储器；所述处理器和所述存储器耦合；所述存储器，用于存储计算机程序或指令；所述处理器，用于执行所述存储器中的部分或者全部计算机程序或指令，当所述部分或者全部计算机程序或指令被执行时，用于实现上述第一方面及第一方面任一可能的实现的方法中第一设备的功能，或实现上述第二方面及第二方面任一可能的实现中第二设备的功能。
在一种可能的实现中，所述装置还可以包括通信接口，所述通信接口与所述处理器耦合，所述通信接口，用于发送所述处理器处理后的信号，或者接收输入给所述处理器的信号。所述接口可以执行第一方面及第一方面任一可能的实现中第一设备执行的发送动作或接收动作；或者，执行第二方面及第二方面任一可能的实现中第二设备执行的发送动作或接收动作。
例如，在用于实现上述第一方面及第一方面任一可能的实现的方法中第一设备的功能时：
所述处理器，用于：获取多个第一命令；对所述第一命令进行封装，得到第二命令，其中，在所述多个第一命令包括至少两个具有保序要求的目标命令的情况下，所述封装包括为所述目标命令添加顺序标识，所述顺序标识用于指示所述目标命令的执行顺序；
所述通信接口，用于：并行地发送多个所述第二命令。
示例的，所述第一命令为IO命令。
示例的，所述第一命令为：对用户数据的写命令；或，对节点数据的写命令；其中，所述节点数据用于指示所述用户数据所存储的位置。
示例的，所述顺序标识为序列号，通过所述序列号的数值大小指示执行顺序。
示例的，所述处理器，还用于：获取保序标识命令，所述保序标识命令用于指示：位于所述保序标识命令前面的命令的执行顺序早于所述保序标识命令的下一个命令的执行顺序；将在所述保序标识命令之前获取到的第一命令和在所述保序标识命令之后获取到的首个命令，确定为目标命令。
示例的，为在所述保序标识命令之前获取到的第一命令添加的序列号，与为在所述保序标识命令之后获取到的首个第一命令添加的序列号不同。
示例的，所述通信接口在用于并行地发送多个所述第二命令时，具体用于：并行地、乱序地发送多个所述第二命令。
示例的，所述封装还包括：为所述多个第一命令中的除所述目标命令外的第一命令添加顺序标识。
第六方面，提供了一种存储控制器，包括：处理器，以及耦合至所述处理器的通信接口；
所述通信接口，用于：并行地接收多个第二命令；
所述处理器，用于：对所述第二命令进行解封装，所述解封装包括解析所述第二命令包括的第一命令和顺序标识，所述顺序标识用于指示具有保序要求的命令的执行顺序；根据所述顺序标识，调度多个所述第一命令。
在一种可能的实现中，所述顺序标识为序列号；所述处理器在用于根据所述顺序标识，调度多个所述第一命令时，具体用于：按照所述序列号的数值大小，调度多个所述第一命令。
第七方面，提供了一种闪存，所述闪存包括第六方面介绍的存储控制器，以及闪存阵列；所述存储控制器，用于：调度所述第一命令对所述闪存阵列进行访问。
第八方面，提供了一种计算机可读存储介质，用于存储计算机程序，所述计算机程序包括用于实现第一方面及第一方面任一可能的实现中的功能的指令，或用于实现第二方面及第二方面任一可能的实现中的功能的指令。
或者，一种计算机可读存储介质，用于存储计算机程序，所述计算机程序被计算机执行时，可以使得所述计算机执行上述第一方面及第一方面任一可能的实现的方法中第一设备执行的方法，或执行上述第二方面及第二方面任一可能的实现中第二设备执行的方法。
第九方面，提供了一种计算机程序产品，所述计算机程序产品包括：计算机程序代码，当所述计算机程序代码在计算机上运行时，使得计算机执行上述第一方面及第一方面任一可能的实现中由第一设备执行的方法，或执行上述第二方面及第二方面任一可能的实现中由第二设备执行的方法。
上述第三方面至第九方面的技术效果可以参照第一方面至第二方面中的描述，重复之处不再赘述。
附图说明
图1为本申请实施例适用的一种NAND Flash存储系统结构图；
图2为本申请实施例适用的一种数据处理过程示意图；
图3为本申请实施例适用的另一种NAND Flash存储系统结构图；
图4为本申请实施例适用的一种数据处理装置结构图；
图5为本申请实施例适用的一种数据处理装置结构图。
具体实施方式
以下对本申请实施例的部分用语进行解释说明，以便于本领域技术人员理解。
1)本申请的文件系统，可以理解为用于管理文件的系统。文件系统的数据包括节点数据(node data)和用户数据(user data)。用户数据即为文件本身，例如图片、视频、聊天记录等。节点数据用于文件系统索引文件在存储设备中的逻辑位置。
用户的操作行为(例如应用程序操作、下载图片、网聊等)，可以理解为对文件系统进行操作，主要是文件的读取和保存，文件系统将这些用户操作行为转化为IO读、IO写、FLUSH等命令(命令也可以替换为请求)。
这些IO读命令、IO写命令所对应的数据包括：文件本身(例如图片)的user data，还可以包括文件系统生成的用于记录user data在文件系统的哪个位置的节点数据(node data)。节点数据(node data)类似一张多级索引表，大部分情况下，这些节点数据(node data)需要先等待文件本身(例如图片)的用户数据(user data)先写入存储设备，才能保存节点数据(node data)到存储设备。以便于文件系统根据节点数据(node data)搜索文件本身(例如图片)的用户数据(user data)。如果先保存节点数据(node data)到存储设备，但是文件本身(例如图片)的用户数据(user data)没有存储到与节点数据(node data)对应的逻辑位置上，则文件系统在根据节点数据(node data)搜索文件本身(例如图片)的用户数据(user data)，会因为无法找到用户数据(user data)而出现异常。
目前，文件系统在文件本身(例如图片)的用户数据(user data)和相关的节点数据(node data)之间，通过串行的方式或者通过之间穿插FLUSH命令的方式来进行保序。
2)Flash闪存和内存的区别
内存：例如随机存取存储器(random access memory，RAM)，电源关闭数据不保留。存储单元的内容可按需随意取出或存入，且存取的速度与存储单元的位置无关。在断电时会丢失其存储内容，主要用于存储短时间使用的程序。
Flash：电源关闭数据保留。具备电子可擦除可编程只读存储器(electrically EPROM，EEPROM)的性能，在没有电流供应的条件下也能够长久地保持数据，其存储特性相当于硬盘，还可以快速读取数据。目前Flash主要包括NOR Flash和NADN Flash。
为便于理解本申请实施例，接下来对本请的应用场景进行介绍，本申请实施例描述的网络架构以及业务场景是为了更加清楚的说明本申请实施例的技术方案，并不构成对于本申请实施例提供的技术方案的限定，本领域普通技术人员可知，随着新业务场景的出现，本申请实施例提供的技术方案对于类似的技术问题，同样适用。
用户在使用电子设备时，图片、聊天记录、视频等信息会先存储到电子设备的内存中， 该内存可以是数据交换的缓冲区(称为cache)，该缓存区可以看做是中央处理器(central processing unit，CPU)的一部分。对于不想丢失的信息，CPU可以将信息从内存中提取出来，存储到存储设备(例如存储卡)的闪存阵列中。当然，对于需要及时查看的信息，CPU也可以将信息从闪存阵列中提取出来，存储到内存中。或者，当系统上电时，CPU将闪存阵列中的待运行数据复制到内存(例如RAM)中进行存储；当系统开始掉电时，CPU将内存(例如RAM)中运行的数据复制到闪存阵列中进行存储。
接下来结合图1所示，介绍一种基于NAND Flash的存储系统示意图，介绍一下信息从内存存储到闪存阵列(NAND Flash介质层)中，以及从闪存阵列存储到内存中的过程。
如图1所示，该存储系统包括：内存、主机Host文件系统层、Host驱动层、Host设备硬件接口层、设备Device硬件接口层、Device命令调度层、Device命令处理层、NAND Flash介质层。例如，内存可以看做是电子设备中的CPU中的缓冲区。主机侧可以看做是电子设备中的CPU。设备Device侧可以看做是电子设备的存储设备(例如存储卡)中的控制器(处理器)。NAND Flash介质层可以看作是存储卡中的闪存阵列。
Host文件系统层主要负责调度和处理用户操作请求，将用户操作请求转换为块设备请求、将块设备请求下发给Host驱动层，还可以处理Host驱动层返回的块设备请求的执行结果。Host驱动层主要负责接收Host文件系统层下发的块设备请求，将块设备请求转换为Host和Device接口协议要求的格式的命令。通过Host设备硬件接口层将命令发送给Device设备，同时处理Device设备返回的命令执行结果。Host设备硬件接口层和Device硬件接口层主要负责提供用于Host和Device的命令高速交互的通道。Device命令调度层主要负责调度Host驱动层下发的命令，并发送给Device命令处理层。Device命令处理层主要负责处理Host下发的命令，并返回命令的执行结果给Host。NAND Flash介质层存储命令中携带的数据。
对于基于NAND Flash的存储系统而言，存在典型的请求(请求也可以称为命令)，例如，IO写请求和IO读请求。Host文件系统层通过IO写请求，将内存中的特定数据写入NAND Flash介质中。Host文件系统层通过IO读请求从NAND Flash介质中读取特定的数据到内存中。
在某些场景下，多个并发的IO写命令之间有保序要求。例如，flash友好文件系统(flash friendly file system，F2FS)中，IO写命令包括：文件本身的用户数据(user data)的IO写命令，还可以包括节点数据(node data)的IO写命令。这些节点数据(node data)需要先等待用户数据(user data)先写入存储设备闪存阵列(例如NAND Flash介质)，才能保存节点数据(node data)到存储设备的闪存阵列(例如NAND Flash介质)。即，先执行用户数据(user data)的IO写命令，再执行节点数据(node data)的IO写命令。再例如，任意的4个IO写命令，依次为IO_W0、IO_W1、IO_W2、IO_W3，IO_W1和IO_W2有保序要求，例如必须先执行完IO_W1写命令，才能执行IO_W2写命令，其余命令之间的顺序不进行限制。
Host文件系统层可以在多个有保序要求的IO写命令之间，执行下发等待。即一个IO写命令执行完成，返回命令的执行结果给Host文件系统层后，Host文件系统层再下发下一个IO写命令。Host文件系统层通过串行执行的方式，保证有保序要求的多个IO写命令的执行顺序。
但是串行执行命令，时延较长，会影响存储系统的性能，特别是存储系统中优先级较 高业务的命令串行等待，会导致整个存储系统在有命令保序要求的场景下，性能大幅降低，用户体验较差。
基于此，本申请提出并行发送多个命令的技术方案，为多个命令分别分配顺序标识，通过顺序标识来指示执行命令的先后顺序，减少多个命令的执行等待时间，提高存储系统性能，提高用户体验。
接下来将结合附图对方案进行详细介绍。附图中以虚线标识的特征或内容可理解为本申请实施例的可选操作或者可选结构。
如图2所示，提供了一种数据处理方法，包括以下步骤：
步骤201：第一设备获取多个第一命令。
此处的第一命令为命令本身，“第一”是为了便于与后续的第二命令进行区分，第二命令为经过封装后的命令，例如对第一命令进行了格式转换，再例如，第二命令包括命令本身(即第一命令)及为命令本身(即第一命令)分配(分配与添加可以相互替换)的顺序标识。
所述第一命令可以是IO命令，也可以是RPMB命令。所述第一命令包括写命令和/或读命令。例如IO写命令和/或IO读命令。例如，写命令(第一命令)用于将内存(第一设备侧的内存)中的数据写入闪存阵列(第二设备侧的闪存阵列)中，读命令用于将闪存阵列中的数据读取至内存中。
获取的所述多个第一命令可以是全部的第一命令均没有保护要求；也可以是全部的第一命令有保序要求；也可以是部分(至少两个)第一命令有保序要求，部分第一命令没有保序要求。例如，获取到4个第一命令，分别为：IO_W0、IO_W1、IO_W2、IO_W3，IO_W1和IO_W2有保序要求，例如必须先执行完IO_W1命令，才能执行IO_W2命令，其余命令之间的顺序不进行限制。
例如，命令的类型可以是对用户数据的写命令，也可以是对节点数据的写命令。例如所述多个第一命令包括：对用户数据的写命令和对节点数据的写命令，所述节点数据用于指示所述用户数据所存储的位置。例如，所述对节点数据的写命令的执行顺序需要在所述对用户数据的写命令的执行顺序之后，即，先执行用户数据(user data)的命令，再执行节点数据(node data)的命令。
结合图1，步骤201中的过程可以是Host文件系统层执行，也可以是Host驱动层执行。
步骤202：所述第一设备对所述第一命令进行封装，得到第二命令。
本申请将未进行封装之前的命令称为第一命令，将封装之后的命令称为第二命令。
在一种示例中，所述封装也可以称为封装命令格式，所述封装包括进行格式转换，转换后的格式(即第二命令的格式)满足第一设备与第二设备之间的通信协议。
在一种示例中，在所述多个第一命令包括至少两个具有保序要求的目标命令的情况下，所述封装还包括为所述目标命令添加顺序标识，所述顺序标识用于指示所述目标命令的执行顺序。
例如，在命令域段添加顺序标识。
可选的，所述封装还包括：为所述多个第一命令中的除所述目标命令外的第一命令添加顺序标识。也就是第一设备可以只为具有保序要求的目标命令添加顺序标识，可选的，也可以为没有保序要求的第一命令添加顺序标识。除所述目标命令外的第一命令(没有保 序要求)的顺序标识不进行限制，可以是相同的，也可以是不同的。
第一设备可以在所述多个第一命令中识别出哪些命令为具有保序要求的第一命令(为了便于区分，将具有保序要求的第一命令称为目标命令)，哪些命令为不具有保序要求的第一命令。
例如，第一设备可以根据命令类型确定哪些命令具有保序要求，例如用户数据(user data)的命令与节点数据(node data)的命令有保序要求。例如先执行用户数据(user data)的命令，再执行节点数据(node data)的命令。
例如，第一设备可以通过命令的优先级确定哪些命令具有保序要求。例如，命令的优先级可以通过命令类型体现，例如用户数据(user data)的命令与节点数据(node data)的命令有保序要求。再例如，命令的优先级也可以通过优先级标识体现，例如，具有优先级标识的命令有保序要求。再例如，命令的优先级也可以通过业务体现，例如，某一业务的命令与另一业务的命令有保序要求。第一设备还可以根据优先级确定第一命令中的目标命令的执行顺序要求。例如，优先级较高的目标命令的执行顺序在前，优先级较低的目标命令的执行顺序在后。
再例如，所述第一设备在获取所述多个第一命令时，还可以获取保序标识命令(flag)；所述保序标识命令(flag)用于指示：位于所述保序标识命令(flag)前面的第一命令的执行顺序早于，所述保序标识命令(flag)的下一个第一命令(位于所述保序标识命令后面的首个第一命令)的执行顺序。
第一设备可以通过保序标识命令来识别哪些命令具有保序要求，例如，将在所述保序标识命令(flag)前面获取到的第一命令，和在所述保序标识命令(flag)后面获取到首个第一命令确定为具有保序要求的目标命令。
例如，在第一设备获取到的命令顺序为：IO_W0、IO_W1、flag、IO_W2、IO_W3时，可以将IO_W0、IO_W1、IO_W2确定为目标命令，IO_W0、IO_W1的执行顺序位于IO_W2的执行顺序之前。对于IO_W3与其它几个命令的执行顺序没有限制。
例如，在第一设备获取到的命令顺序为：IO_W1、flag、IO_W2、IO_W0、IO_W3时，可以将IO_W1、IO_W2确定为目标命令，IO_W1的执行顺序位于IO_W2的执行顺序之前。对于IO_W0、IO_W3之间的执行顺序没有限制，对于IO_W0、IO_W3与其它几个命令的执行顺序也没有限制。
例如，在第一设备获取到的命令顺序为：IO_W0、flag、IO_W3、IO_W1、flag、IO_W2时，可以将IO_W0、IO_W3、IO_W1、IO_W2确定为目标命令，IO_W0的执行顺序位于IO_W3的执行顺序之前，且IO_W0、IO_W3、IO_W1的执行顺序位于IO_W2的执行顺序之前。
一种示例中，所述顺序标识包括序列号(serial number，SN)，可以通过所述序列号的数值大小表示所述多个第一命令的执行顺序。例如，序列号小的命令的执行顺序早于序列号大的命令的执行顺序。再例如，序列号小的命令的执行顺序晚于序列号大的命令的执行顺序，即序列号大的命令的执行顺序小于序列号小的命令的执行顺序。或者，所述顺序标识可以a、b、c、A、B、C等。
所述第一设备在为所述多个第一命令分配序列号SN时，可以是：
一种示例中，为需要执行顺序在前的目标命令(第一命令)分配的序列号、大于为需要执行顺序在后的目标命令(第一命令)分配的序列号(即序列号大的先执行，序列号小 的后执行)。对没有保序要求的第一命令分配的序列号的大小不进行限制。
例如，优先级较高的第一命令的执行顺序在前，优先级较低的第一命令的执行顺序在后，则可以按照优先级由高至低、序列号由大至小的顺序，为多个第一命令分配的序列号；即，为优先级较高的第一命令分配的序列号大，为优先级较低的第一命令分配的序列号小。
例如，先执行用户数据(user data)的命令，再执行节点数据(node data)的命令时，为对节点数据的写命令分配的序列号大于为对用户数据的写命令分配的序列号。
例如，为在所述保序标识命令之前获取到的第一命令添加的序列号，与为在所述保序标识命令之后获取到的首个第一命令添加的序列号不同。
例如，为在保序标识命令(flag)之前获取到的命令添加的序列号大于，为在所述保序标识命令之后获取到的首个命令添加的序列号。对于在所述保序标识命令之后获取到的第二个命令、第三个命令……等，添加的序列号的数值大小不进行限制。
另一种示例中，当然也可以反之，即为需要执行顺序在前的第一命令分配的序列号、小于为需要执行顺序在后的第一命令分配的序列号(即序列号小的先执行，序列号大的后执行)。对没有保序要求的第一命令分配的序列号的大小不进行限制。
例如，以按照优先级由高至低、序列号由小至大的顺序，为多个第一命令分配的序列号；即，为优先级较高的第一命令分配的序列号小，为优先级较低的第一命令分配的序列号大。
例如，为对节点数据的写命令分配的序列号小于为对用户数据的写命令分配的序列号。
例如，为在保序标识命令(flag)之前获取到的命令添加的序列号小于，为在所述保序标识命令之后获取到的首个命令添加的序列号。对于在所述保序标识命令之后获取到的第二个命令、第三个命令……等，添加的序列号的数值大小不进行限制。
所述目标命令为：所述多个第一命令中具有保序要求的命令，对于其它的没有保序要求的第一命令，添加的序列号的大小不进行限制。例如，4个第一命令，分别为：IO_W0、IO_W1、IO_W2、IO_W3。IO_W1和IO_W2有保序要求，例如必须先执行完IO_W1命令，才能执行IO_W2命令，其余命令之间的顺序不进行限制。
如果规定序列号小的先执行，序列号大的后执行，则为这4个第一命令分配序列号SN：例如IO_W0_SNx、IO_W1_SNx、IO_W2_SNx+1、IO_W3_SNx；再例如，IO_W0_SNx、IO_W1_SNx、IO_W2_SNx+1、IO_W3_SNx+1；再例如，IO_W0_SNx、IO_W1_SNx、IO_W2_SNx+2、IO_W3_SNx+1等。只要保证IO_W1的序列号小于IO_W2的序列号即可。
如果规定序列号大的先执行，序列号小的后执行，则为这4个第一命令分配序列号SN时，只要保证IO_W1的序列号大于IO_W2的序列号即可。
可以理解的是，IO_W0和IO_W3，也可以不分配序列号SN。
结合图1，步骤202中的过程可以是Host驱动层执行。
步骤203：第一设备并行发送多个第二命令。相应的，第二设备并行接收多个第二命令。
并行发送多个命令所需的时间小于设定阈值，该设定阈值远远小于串行发送(需要等待处理结果的串行发送)多个命令的时间。“并行发送多个命令”也可以理解为无需等待前一命令的处理结果，即可发送下一命令。“并行发送”也可以理解为无需等待处理结果的串行发送。
例如，串行发送4个命令包括：先发送命令1；当接收到该命令1的处理结果后，再 发送命令2；当接收到命令2的处理结果后，再发送命令3；当接收到命令3的处理结果后，再发送命令4。如果，命令1与命令2、命令2与命令3、命令3与命令4的发送时间间隔均为10s，则串行发送4个命令总共用了30s。
并行发送4个命令包括：在发送命令时，无需考虑上一个命令是否已经收到处理结果。例如，先发送命令1，不考虑是否接收到该命令1的处理结果后，就发送命令2；不考虑是否接收到命令2的处理结果，就发送命令3；不考虑是否接收到命令3的处理结果，就发送命令4。并行发送这4个命令总共用10s。或者，这4个命令的先后顺序不进行限制，可以随意顺序(例如，乱序)发送。
对于第二设备来说，在并行接收4个命令时，可能是依次接收到命令1、命令2、命令3、命令4；也可能是乱序接收到命令1、命令2、命令3、命令4。也就是第一设备可以乱序发送多个第二命令，第二设备乱序接收多个第二命令。此处的乱序是相对于第一设备获取多个第一命令的顺序而言的。当第二命令的发送顺序，与第二命令对应的第一命令的获取顺序不一致时，可以理解为乱序发送第二命令。
例如，第一设备获取4个第一命令时的获取顺序分别为命令1、命令2、命令3、命令4。第一设备发送第二命令的顺序为：命令1，命令3，命令4，命令2。这种情况可以理解为乱序发送第二命令。
另外，第一设备在并行地发送多个第二命令时，可以是在一个线程中并行地发送多个第二命令，也可以是在多个线程中并行地发送多个第二命令。
结合图1，步骤203中的过程可以是Host硬件接口层执行和Device硬件接口层执行。
步骤204：所述第二设备在接收到多个第二命令后，对第二命令进行解封装，所述解封装包括解析所述第二命令包括的第一命令和为所述第一命令添加的顺序标识。
所述顺序标识用于指示具有保序要求的命令的执行顺序。结合上文介绍可知，在添加顺序标识时，可能是所有的第一命令都添加了顺序标识，则所有的第二命令均可解析出顺序标识。也可能是一部分第一命令添加了顺序标识，另一部分第一命令没有添加顺序标识，则一部分第二命令可以解析出顺序标识，另一部分第二命令无法解析出顺序标识。
进一步地，所述顺序标识用于指示第一命令的执行顺序。
例如可以在命令域段解析顺序标识。
结合图1，步骤204中的过程可以是Device命令调度层执行。
步骤205：所述第二设备根据所述顺序标识，对所述多个第一命令进行调度，进一步地，并根据调度结果依次执行所述多个第一命令。
一种示例，所述第二设备根据所述顺序标识，串行地对所述多个第一命令进行调度。例如先调度命令1，但接收到命令1的处理结果后，再调度命令2，当接收到命令2的处理结果后，再调度命令3。
第二设备接收到多个命令，可以先解析该命令(命令的命令域段)中是否包括顺序标识。如果解析出命令中不包括顺序标识(或者不能解析出顺序标识)，则可以按照接收顺序执行命令。如果解析出命令中包括顺序标识，则可以按照顺序标识执行命令。
如果有些第二命令可以解析出顺序标识，有些第二命令没有解析出顺序标识，对于其他的没有解析出顺序标识的命令，执行顺序不限定。
例如，4个第一命令，分别为：IO_W0、IO_W1、IO_W2、IO_W3。IO_W1和IO_W2有保序要求，例如必须先执行完IO_W1命令，才能执行IO_W2命令，其余命令之间的顺 序不进行限制。规定序列号小的先执行，序列号大的后执行。
第二设备依次接收到4个命令，分别为IO_W0、IO_W1_SNx、IO_W2_SNx+1、IO_W3，则第二设备对于IO_W1和IO_W2的调度顺序为：先调度IO_W1，再调度IO_W2，IO_W0和IO_W3的调度顺序不进行限定。
例如，按照接收顺序依次调度，即依次调度IO_W0、IO_W1、IO_W2、IO_W3。
再例如，先调度有顺序标识的命令，例如依次调度IO_W1、IO_W2、IO_W0、IO_W3。
再例如，最后调度有顺序标识的命令，例如依次调度IO_W0、IO_W3、IO_W1、IO_W2。
第二设备执行完某个第一命令后，可以将该第一命令的处理结果返回给第一设备。对于处理结果的返回的过程，本申请不进行限定。
第一设备在串行发送(需要等待处理结果的串行发送)多个第一命令时，例如先发送了命令1，当接收到命令1的处理结果后，再发送命令2。一方面，如果第二设备在处理完命令1，向第一设备反馈命令1的处理结果的过程中，第二设备仍然有能力继续处理命令，但是第一设备为了等待命令1的处理结果，还未把命令2发送给第二设备，则第二设备的空闲时间被浪费。另一方面，当第一设备将命令2发送给第二设备时，第二设备可能负载变大或其它原因，无法及时处理命令2，则命令2需要持续等待被处理，多个第一命令被处理的时间延长。
在本申请中，第一设备将多个第二命令(包括第一命令及所述第一命令对应的顺序标识)并行发送给第二设备，第二设备可以根据顺序标识依次对多个第一命令进行调度，依次执行多个第一命令。不但可以保证多个第一命令的执行顺序，而且第二设备可以合理利用自身的空闲时间，及时处理多个第一命令，减少多个第一命令的执行等待时间，提高存储系统性能，提高用户体验。
在一种示例中，所述第一设备包括：驱动层、第一接口层。可选的，还包括：文件系统层。
当所述第一设备为Host时，所述文件系统层例如为图1中的Host文件系统层，所述驱动层例如为图1中的Host驱动层，所述第一接口层例如为图1中的Host硬件接口层。
在步骤201中，所述第一设备获取多个第一命令，可以是所述驱动层获取多个第一命令。例如该获取方式为接收来自所述文件系统层的多个第一命令。也可以是：所述文件系统层获取多个第一命令。
关于获取第一命令的具体细节可以参见步骤201处的描述，重复之处不再赘述。
在步骤202中，所述第一设备对所述第一命令进行封装，可以是：所述驱动层对所述第一命令进行封装。
关于对所述第一命令进行封装的具体细节可以参见步骤202处的描述，重复之处不再赘述。
可以理解的是，所述文件系统层在获取到多个第一命令后，向所述驱动层发送所述多个第一命令。
在一个可选的示例中，所述文件系统层还可以根据所述多个第一命令的执行顺序，向所述驱动层发送所述多个第一命令和保序标识命令(flag)，相应的，所述驱动层从文件系统层获取多个第一命令和保序标识命令(flag)；所述保序标识命令(flag)用于指示：位于所述保序标识命令(flag)前面的第一命令的执行顺序早于，所述保序标识命令(flag) 的下一个第一命令的执行顺序。
所述保序标识命令(flag)在任意的两个目标命令之间发送，且所述保序标识命令(flag)与所述两个目标命令中发送时间靠后的所述目标命令之间不存在其它命令；所述目标命令为：所述多个第一命令中具有保序要求的命令。
在4个第一命令，分别为：IO_W0、IO_W1、IO_W2、IO_W3的情况下：
例如，IO_W1和IO_W2有保序要求(即IO_W1和IO_W2为两个目标命令)，例如必须先执行完IO_W1命令，才能执行IO_W2命令，其余命令之间的顺序不进行限制。
文件系统层向驱动层发送这4个第一命令和保序标识命令的顺序包括但不限于以下的任一项：
IO_W0、IO_W1、flag、IO_W2、IO_W3；或，IO_W0、IO_W3、IO_W1、flag、IO_W2；或，IO_W1、flag、IO_W2、IO_W0、IO_W3；或，IO_W1、IO_W0、IO_W3、flag、IO_W2等。只要保证IO_W1位于IO_W2之前，且flag后相邻的命令为IO_W2即可。
再例如，IO_W0、IO_W1和IO_W2有保序要求(即IO_W0、IO_W1和IO_W2为三个目标命令)，例如必须先执行完IO_W1命令，再执行完IO_W1命令，再执行IO_W2命令，其余命令之间的顺序不进行限制。
文件系统层向驱动层发送这4个第一命令和保序标识命令的顺序包括但不限于以下的任一项：
IO_W0、flag、IO_W1、flag、IO_W2、IO_W3；或，IO_W0、IO_W3、flag、IO_W1、flag、IO_W2；或，IO_W0、flag、IO_W1、flag、IO_W3、IO_W2、IO_W0、IO_W3等。只要保证IO_W0位于IO_W1之前，IO_W1位于IO_W2之前，且一个flag后相邻的命令为IO_W1，另一个flag后相邻的命令为IO_W2即可。
在步骤203中，所述第一设备并行发送多个所述第二命令，可以是：所述第一接口层并行发送多个所述第二命令。关于并行发送多个第二命令的具体细节可以参见步骤203处的描述，重复之处不再赘述。
在一种示例中，所述第二设备包括：第二接口层，命令调度层，可选的，还包括命令处理层。
当所述第二设备为设备Device时，所述第二接口层例如为图1中的Device硬件接口层，所述命令调度层例如为图1中的Device命令调度层，所述命令处理层例如为图1中的Device命令处理层。
在步骤203中，所述第二设备并行接收多个第二命令，可以是：所述第二接口层并行接收多个第二命令。
可以理解的是，所述第二接口层将多个第二命令并行发送给所述命令调度层。
在步骤204中，所述第二设备在接收到多个第二命令后，对第二命令进行解封装，可以是所述命令调度层为对所述第二命令进行解封装。
在步骤205中，所述第二设备根据所述顺序标识，对所述多个第一命令进行调度，可以是：所述命令调度层根据每个第一命令对应的顺序标识，对所述多个第一命令进行调度。
对所述多个第一命令进行调度，可以理解为串行将多个第一命令发送给所述命令处理层。串行将第一命令发送给命令处理层，可以理解为当接收到一个第一命令的处理结果后，再将下一个第一命令发送给命令处理层。
在步骤205中，所述第二设备根据调度结果依次执行所述多个第一命令，可以是：所述命令处理层接收来自所述命令调度层的第一命令，并执行。
命令调度层发送给命令处理层的命令上不携带顺序标识(例如序列号)，命令处理层给Flash介质层的命令中也不携带顺序标识(例如序列号)。
如图3所示，提供了一种基于NAND Flash的存储系统示意图，在图1的基础上，该存储系统新增加了：功能1(可选的)、功能2和功能3。与图1的相同之处不再重复赘述。
功能1(可选的)：在Host文件系统层新增加文件系统保序功能。
如果Host文件系统层获取的多个第一命令(例如IO写命令)之间有保序的要求，则可以通过功能1下发保序标识命令(flag)给Host驱动层。在某些场景下，Host文件系统层下发给Host驱动层的已有命令可以使Host驱动层识别命令需要保序，则功能1不需要。例如，Host文件系统层下发给Host驱动层的第一命令包括节点数据的命令和用户数据的命令，Host驱动层可以区分出这两种类型的第一命令之间有保序要求，则Host文件系统层无需再向Host驱动层下发保序标识命令。
例如，Host文件系统层获取到4个第一命令，分别为IO_W0、IO_W1、IO_W2、IO_W3，IO_W1和IO_W2有保序要求，例如必须先执行完IO_W1命令，才能执行IO_W2命令，其余命令之间的顺序不进行限制。文件系统保序功能可以在需要保序的IO_W1命令和IO_W2命令之间下发保序标识命令flag，以实现通知Host驱动层，IO_W1命令和IO_W2命令之间需要保序。例如，文件系统保序功能向Host驱动层发送这4个第一命令和保序标识命令flag的顺序可以是：IO_W0、IO_W1、flag、IO_W2、IO_W3。
功能2：在Host驱动层新增驱动保序处理功能。
驱动保序处理功能维护命令的顺序标识，例如维护命令的序列号值。Host驱动层和Device命令调度层维护的顺序标识(例如序列号初值)固定或者彼此协商。驱动保序处理功能对多个第一命令(例如IO写命令)分配顺序标识(例如序列号值)。
一种示例中，驱动保序处理功能接收到Host文件系统层下发的多个第一命令，按照预设的序列号值规则，为多个第一命令分配对应的序列号。例如，为第一个接收到的IO_W0命令分配的序列号为SNx，为第二个接收到的IO_W1命令分配的序列号为SNx，为第三个接收到的IO_W2命令分配的序列号为SNx。如果驱动保序处理功能在接收到的IO_W1命令后，接收到Host文件系统层下发的保序标识命令(flag)，在保序标识命令(flag)之后，接收到IO_W2命令，则可以将保序标识命令的下一个命令(即IO_W2命令)的序列号值按照某种规则做变化，以体现保序标识命令的下一个命令(即IO_W2命令)的执行顺序应该排在保序标识命令(flag)之前的命令的后面。例如，如果规定序列号小的先执行，序列号大的后执行，可以对序列号的值增加1，为IO_W2命令分配的序列号为SNx+1。再例如，如果规定序列号大的先执行，序列号小的后执行，可以对序列号的值减去1，为IO_W2命令分配的序列号为SNx-1。
对于后续第四个接收到的IO_W3命令，可以不添加序列号，也可以添加序列。如果添加序列号，对于序列号的大小不进行限制，例如，添加序列号为SNx+1，SNx，SNx-1，SNx+2。
Host驱动层的驱动保序处理功能的序列号变化规则、和Device命令调度层的序列号变化规则固定或者彼此协商已知。例如，Host驱动层和Device命令调度层对序列号初值固定 从1开始，且依次递增加1。
Host驱动层对IO_W0、IO_W1封装命令结构，在序列号小的先执行，序列号大的后执行的情况下，命令域段添加序列号SN为x，因为接收到保序标识命令(flag)，所以对Host驱动层维护的序列号SN增加1,对后续接收的IO_W2的命令域段添加SN为x+1，对于接收的IO_W3的命令域段添加SN是任意的，例如添加序列号为SNx+1，得到IO_W3_SNx+1。驱动保序处理功能通过Host设备硬件接口层和Device硬件接口层将4个第二命令(分别为IO_W0_SNx、IO_W1_SNx、IO_W2_SNx+1、IO_W3_SNx+1)发送给Device命令调度层。
可以理解的是，这4个第二命令的发送顺序可以是随意的，由于第二命令中包括序列号，Device命令调度层可以根据序列号，依次对第一命令进行调度，满足第一命令的保序需求。
功能3：在Device命令调度层新增命令保序处理功能。
命令保序处理功能对Host驱动层下发的第二命令，按照第二命令中的顺序标识(例如序列号)所规定的顺序，对多个第一命令进行调度。
例如，Device命令调度层接收Host驱动层下发的IO_W0_SNx、IO_W1_SNx、IO_W2_SNx+1、IO_W3_SNx+1这4个命令。可能会出现先接收到IO_W2_SNx+1，再接收到IO_W1_SNx，则命令保序处理功能对IO_W1_SNx和IO_W2_SNx+1按照序列号SN由小至大进行排序处理。
命令保序处理功能将4个第二命令：IO_W0_SNx、IO_W1_SNx、IO_W2_SNx+1、IO_W3_SNx+1还原为Host文件系统层获取到的第一命令：IO_W0、IO_W1、IO_W2、IO_W3，并将这些第一命令按照序列号的顺序发送给Device命令处理层，由Device命令处理层对第一命令进行具体处理，最终将数据写入NAND FLASH介质层中。
可以理解的是，Host命令调度层发送给Host命令处理层的第一命令中不携带序列号，Host处理层给NAND FLASH介质层的第一命令中也不携带序列号。
基于NAND FLASH的存储系统中，通过携带表征命令执行顺序的序列号，使整个存储系统IO路径涉及的几个环节，按照预先定义的序列号规则进行命令之间的顺序处理。Host下发给Device的命令携带表征命令执行顺序的序列号，来通知Device处理命令的先后顺序，Device按照序列号来处理命令，从而解决了Host文件系统层在多个命令之间有保序要求时，只能依次等待之前下发给Host驱动层的命令的处理结果，再下发后续命令，而引起的命令串行执行的问题。
前文介绍了本申请实施例的方法，下文中将介绍本申请实施例中的装置。方法、装置是基于同一技术构思的，由于方法、装置解决问题的原理相似，因此装置与方法的实施可以相互参见，重复之处不再赘述。
本申请实施例可以根据上述方法示例，对装置进行功能模块的划分，例如，可以对应各个功能划分为各个功能模块，也可以将两个或两个以上的功能集成在一个模块中。这些模块既可以采用硬件的形式实现，也可以采用软件功能模块的形式实现。需要说明的是，本申请实施例中对模块的划分是示意性的，仅仅为一种逻辑功能划分，具体实现时可以有另外的划分方式。
基于与上述方法的同一技术构思，参见图4，提供了一种数据处理装置400结构示意 图，该装置400可以包括：处理模块410，可选的，还包括接收模块420a、发送模块420b、存储模块430。处理模块410可以分别与存储模块430和接收模块420a和发送模块420b相连，所述存储模块430也可以与接收模块420a和发送模块420b相连。
在一种示例中，上述的接收模块420a和发送模块420b也可以集成在一起，定义为收发模块。
在一种示例中，该装置400可以为第一设备，也可以为应用于第一设备中的芯片或功能单元。该装置400具有上述方法中第一设备的任意功能，例如，该装置400能够执行上述图2、图3的方法中由第一设备执行的各个步骤。
所述接收模块420a，可以执行上述方法实施例中第一设备执行的接收动作。
所述发送模块420b，可以执行上述方法实施例中第一设备执行的发送动作。
所述处理模块410，可以执行上述方法实施例中第一设备执行的动作中，除发送动作和接收动作外的其它动作。
在一种示例中，所述存储模块430，可以存储第一设备执行的方法的计算机执行指令，以使处理模块410和接收模块420a和发送模块420b执行上述示例中第一设备执行的方法。
示例的，存储模块可以包括一个或者多个存储器，存储器可以是一个或者多个设备、电路中用于存储程序或者数据的器件。存储模块可以是寄存器、缓存或者RAM等，存储模块可以和处理模块集成在一起。存储模块可以是ROM或者可存储静态信息和指令的其他类型的静态存储设备，存储模块可以与处理模块相独立。
所述收发模块可以是输入或者输出接口、管脚或者电路等。
在一种示例中，该装置400可以为第二设备，也可以为应用于第二设备中的芯片或功能单元。该装置400具有上述方法中第二设备的任意功能，例如，该装置400能够执行上述图2、图3的方法中由第二设备执行的各个步骤。
所述接收模块420a，可以执行上述方法实施例中第二设备执行的接收动作。
所述发送模块420b，可以执行上述方法实施例中第二设备执行的发送动作。
所述处理模块410，可以执行上述方法实施例中第二设备执行的动作中，除发送动作和接收动作外的其它动作。
在一种示例中，所述存储模块430，可以存储第二设备执行的方法的计算机执行指令，以使处理模块410和接收模块420a和发送模块420b执行上述示例中第二设备执行的方法。
示例的，存储模块可以包括一个或者多个存储器，存储器可以是一个或者多个设备、电路中用于存储程序或者数据的器件。存储模块可以是寄存器、缓存或者RAM等，存储模块可以和处理模块集成在一起。存储模块可以是ROM或者可存储静态信息和指令的其他类型的静态存储设备，存储模块可以与处理模块相独立。
所述收发模块可以是输入或者输出接口、管脚或者电路等。
以上介绍了本申请实施例的应用于第一设备的装置和应用于第二设备的装置，以下介绍所述应用于第一设备的装置和所述应用于第二设备的装置可能的产品形态。应理解，但凡具备上述图4所述的应用于第一设备的装置的特征的任何形态的产品，和应用于第二设备的装置的特征的任何形态的产品，都落入本申请的保护范围。还应理解，以下介绍仅为举例，不应限制本申请实施例的应用于第一设备的装置的产品形态，和应用于第二设备的 装置的产品形态仅限于此。
作为一种可能的产品形态，装置可以由一般性的总线体系结构来实现。
如图5所示，提供了一种数据处理装置500的示意性框图。
该装置500可以包括：处理器510，可选的，还包括通信接口520、存储器530。该通信接口520，可以用于接收程序或指令并传输至所述处理器510，或者，该通信接口520可以用于该装置500与其他通信设备进行通信交互，比如交互控制信令和/或业务数据等。该通信接口520可以为代码和/或数据读写通信接口，或者，该通信接口520可以为处理器与收发机之间的信号传输通信接口。所述处理器510和所述存储器530之间电耦合。
一种示例中，该装置500可以为第一设备，也可以为应用于第一设备中的芯片。应理解，该装置具有上述方法中第一设备的任意功能，例如，所述装置500能够执行上述图2、图3的方法中由第一设备执行的各个步骤。示例的，所述存储器530，用于存储计算机程序；所述处理器510，可以用于调用所述存储器530中存储的计算机程序或指令，执行上述示例中第一设备执行的方法，或者通过所述通信接口520执行上述示例中第一设备执行的方法。
一种示例中，该装置500可以为第二设备，也可以为应用于第二设备中的芯片。应理解，该装置具有上述方法中第二设备的任意功能，例如，所述装置500能够执行上述图2、图3的方法中由第二设备执行的各个步骤。示例的，所述存储器530，用于存储计算机程序；所述处理器510，可以用于调用所述存储器530中存储的计算机程序或指令，执行上述示例中第二设备执行的方法，或者通过所述通信接口520执行上述示例中第二设备执行的方法。
图4中的处理模块410可以通过所述处理器510来实现。
图4中的接收模块420a和发送模块420b可以通过所述通信接口520来实现。或者，通信接口520分为接收器和发送器，接收器执行接收模块的功能，发送器执行发送模块的功能。
图4中的存储模块430可以通过所述存储器530来实现。
作为一种可能的产品形态，装置可以由存储控制器(存储控制器也可以称为芯片或芯片系统)来实现。
一种可能的实现方式中，存储控制器包括：处理器，以及耦合至所述处理器的通信接口；
图4中的处理模块410可以通过处理器来实现。
图4中的接收模块420a和发送模块420b可以通过通信接口来实现。或者，输入输出接口分为输入接口和输出接口，输入接口执行接收模块的功能，输出接口执行发送模块的功能。
图4中的存储模块430可以通过存储介质来实现。
例如，所述通信接口，用于：并行地接收多个第二命令；
所述处理器，用于：对所述第二命令进行解封装，所述解封装包括解析所述第二命令包括的第一命令和顺序标识，所述顺序标识用于指示具有保序要求的命令的执行顺序；根据所述顺序标识，调度多个所述第一命令。
在一种可能的实现中，所述顺序标识为序列号；所述处理器在用于根据所述顺序标识， 调度多个所述第一命令时，具体用于：
按照所述序列号的数值大小，调度多个所述第一命令。
作为一种可能的产品形态，装置可以由闪存来实现，所述闪存包括上述介绍的存储控制器，以及闪存阵列；
所述存储控制器，用于：调度所述第一命令对所述闪存阵列进行访问。
作为一种可能的产品形态，本申请实施例的装置，还可以使用下述来实现：一个或多个FPGA(现场可编程门阵列)、PLD(可编程逻辑器件)、控制器、状态机、门逻辑、分立硬件部件、任何其它适合的电路、或者能够执行本申请通篇所描述的各种功能的电路的任意组合。
本申请实施例还提供了一种计算机可读存储介质，存储有计算机程序，该计算机程序被计算机执行时，可以使得所述计算机用于执行上述数据处理的方法。或者说：所述计算机程序包括用于实现上述数据处理的方法的指令。
本申请实施例还提供了一种计算机程序产品，包括：计算机程序代码，当所述计算机程序代码在计算机上运行时，使得计算机可以执行上述提供的数据处理的方法。
本申请实施例还提供了一种数据处理系统，所述系统包括：执行上述数据处理的方法的第一设备和第二设备。
另外，本申请实施例中提及的处理器可以是中央处理器(central processing unit，CPU)，基带处理器，基带处理器和CPU可以集成在一起，或者分开，还可以是网络处理器(network processor，NP)或者CPU和NP的组合。处理器还可以进一步包括硬件芯片或其他通用处理器。上述硬件芯片可以是专用集成电路(application-specific integrated circuit，ASIC)，可编程逻辑器件(programmable logic device，PLD)或其组合。上述PLD可以是复杂可编程逻辑器件(complex programmable logic device，CPLD)，现场可编程逻辑门阵列(field-programmable gate array，FPGA)，通用阵列逻辑(generic array logic，GAL)及其他可编程逻辑器件、分立门或者晶体管逻辑器件、分立硬件组件等或其任意组合。通用处理器可以是微处理器或者该处理器也可以是任何常规的处理器等。
本申请实施例中提及的存储器可以是易失性存储器或非易失性存储器，或可包括易失性和非易失性存储器两者。其中，非易失性存储器可以是只读存储器(Read-Only Memory，ROM)、可编程只读存储器(Programmable ROM，PROM)、可擦除可编程只读存储器(Erasable PROM，EPROM)、电可擦除可编程只读存储器(Electrically EPROM，EEPROM)或闪存。易失性存储器可以是随机存取存储器(Random Access Memory，RAM)，其用作外部高速缓存。通过示例性但不是限制性说明，许多形式的RAM可用，例如静态随机存取存储器(Static RAM，SRAM)、动态随机存取存储器(Dynamic RAM，DRAM)、同步动态随机存取存储器(Synchronous DRAM，SDRAM)、双倍数据速率同步动态随机存取存储器(Double Data Rate SDRAM，DDR SDRAM)、增强型同步动态随机存取存储器(Enhanced SDRAM，ESDRAM)、同步连接动态随机存取存储器(Synchlink DRAM，SLDRAM)和直接内存总线随机存取存储器(Direct Rambus RAM，DR RAM)。应注意，本申请描述的存储器旨在包括但不限于这些和任意其它适合类型的存储器。
本申请实施例中提及的收发器中可以包括单独的发送器，和/或，单独的接收器，也可 以是发送器和接收器集成一体。收发器可以在相应的处理器的指示下工作。可选的，发送器可以对应物理设备中发射机，接收器可以对应物理设备中的接收机。
本领域普通技术人员可以意识到，结合本文中所公开的实施例中描述的各方法步骤和单元，能够以电子硬件、计算机软件或者二者的结合来实现，为了清楚地说明硬件和软件的可互换性，在上述说明中已经按照功能一般性地描述了各实施例的步骤及组成。这些功能究竟以硬件还是软件方式来执行，取决于技术方案的特定应用和设计约束条件。本领域普通技术人员可以对每个特定的应用来使用不同方法来实现所描述的功能，但是这种实现不应认为超出本申请的范围。
在本申请所提供的几个实施例中，应该理解到，所揭露的系统、装置和方法，可以通过其它的方式实现。例如，以上所描述的装置实施例仅仅是示意性的，例如，所述单元的划分，仅仅为一种逻辑功能划分，实际实现时可以有另外的划分方式，例如多个单元或组件可以结合或者可以集成到另一个系统，或一些特征可以忽略，或不执行。另外，所显示或讨论的相互之间的耦合或直接耦合或通信连接可以是通过一些接口、装置或单元的间接耦合或通信连接，也可以是电的，机械的或其它的形式连接。
另外，在本申请各个实施例中的各功能单元可以集成在一个处理单元中，也可以是各个单元单独物理存在，也可以是两个或两个以上单元集成在一个单元中。上述集成的单元既可以采用硬件的形式实现，也可以采用软件功能单元的形式实现。
所述集成的单元如果以软件功能单元的形式实现并作为独立的产品销售或使用时，可以存储在一个计算机可读取存储介质中。基于这样的理解，本申请的技术方案本质上或者说对现有技术做出贡献的部分，或者该技术方案的全部或部分可以以软件产品的形式体现出来，该计算机软件产品存储在一个存储介质中，包括若干指令用以使得一台计算机设备(可以是个人计算机，服务器，或者网络设备等)执行本申请各个实施例所述方法的全部或部分步骤。而前述的存储介质包括：U盘、移动硬盘、只读存储器(read-only memory，ROM)、随机存取存储器(random access memory，RAM)、磁碟或者光盘等各种可以存储程序代码的介质。
本申请中的“和/或”，描述关联对象的关联关系，表示可以存在三种关系，例如，A和/或B，可以表示：单独存在A，同时存在A和B，单独存在B这三种情况。字符“/”一般表示前后关联对象是一种“或”的关系。本申请中所涉及的多个，是指两个或两个以上。另外，需要理解的是，在本申请的描述中，“第一”、“第二”等词汇，仅用于区分描述的目的，而不能理解为指示或暗示相对重要性，也不能理解为指示或暗示顺序。
尽管已描述了本申请的优选实施例，但本领域内的技术人员一旦得知了基本创造性概念，则可对这些实施例作出另外的变更和修改。所以，所附权利要求意欲解释为包括优选实施例以及落入本申请范围的所有变更和修改。
显然，本领域的技术人员可以对本申请实施例进行各种改动和变型而不脱离本申请实施例的精神和范围。这样，倘若本申请实施例的这些修改和变型属于本申请权利要求及其等同技术的范围之内，则本申请也意图包括这些改动和变型在内。

Claims (20)

  1. 一种数据处理装置，其特征在于，包括：处理器，以及耦合至所述处理器的通信接口；
    所述处理器，用于：获取多个第一命令；对所述第一命令进行封装，得到第二命令，其中，在所述多个第一命令包括至少两个具有保序要求的目标命令的情况下，所述封装包括为所述目标命令添加顺序标识，所述顺序标识用于指示所述目标命令的执行顺序；
    所述通信接口，用于：并行地发送多个所述第二命令。
  2. 如权利要求1所述的装置，其特征在于，所述第一命令为IO命令。
  3. 如权利要求1或2所述的装置，其特征在于，所述第一命令为：对用户数据的写命令；或，对节点数据的写命令；其中，所述节点数据用于指示所述用户数据所存储的位置。
  4. 如权利要求1-3任一项所述的装置，其特征在于，所述顺序标识为序列号，通过所述序列号的数值大小指示命令的执行顺序。
  5. 如权利要求1-4任一项所述的装置，其特征在于，所述处理器，还用于：
    获取保序标识命令，所述保序标识命令用于指示：位于所述保序标识命令前面的命令的执行顺序早于所述保序标识命令的下一个命令的执行顺序；
    将在所述保序标识命令之前获取到的第一命令和在所述保序标识命令之后获取到的首个命令，确定为目标命令。
  6. 如权利要求5所述的装置，其特征在于，为在所述保序标识命令之前获取到的第一命令添加的序列号，与为在所述保序标识命令之后获取到的首个第一命令添加的序列号不同。
  7. 如权利要求1-6任一项所述的装置，其特征在于，所述通信接口在用于并行地发送多个所述第二命令时，具体用于：
    并行地、乱序地发送多个所述第二命令。
  8. 如权利要求1-7任一项所述的装置，其特征在于，所述封装还包括：为所述多个第一命令中的除所述目标命令外的第一命令添加顺序标识。
  9. 一种存储控制器，其特征在于，包括：处理器，以及耦合至所述处理器的通信接口；
    所述通信接口，用于：并行地接收多个第二命令；
    所述处理器，用于：对所述第二命令进行解封装，所述解封装包括解析所述第二命令包括的第一命令和顺序标识，所述顺序标识用于指示具有保序要求的命令的执行顺序；根据所述顺序标识，调度多个所述第一命令。
  10. 如权利要求9所述的存储控制器，其特征在于，所述顺序标识为序列号；所述处理器在用于根据所述顺序标识，调度多个所述第一命令时，具体用于：
    按照所述序列号的数值大小，调度多个所述第一命令。
  11. 一种闪存，其特征在于，包括：如权利要求9或10所述的存储控制器，以及闪存阵列；
    所述存储控制器，用于：调度所述第一命令对所述闪存阵列进行访问。
  12. 一种数据处理方法，其特征在于，所述方法包括：
    获取多个第一命令；
    对所述第一命令进行封装，得到第二命令，其中，在所述多个第一命令包括至少两个 具有保序要求的目标命令的情况下，所述封装包括为所述目标命令添加顺序标识，所述顺序标识用于指示所述多个目标命令的执行顺序；
    并行地发送多个所述第二命令。
  13. 如权利要求12所述的方法，其特征在于，所述顺序标识为序列号，所述序列号的数值大小用于指示执行顺序。
  14. 如权利要求12或13所述的方法，其特征在于，还包括：
    获取保序标识命令，所述保序标识命令用于指示：位于所述保序标识命令前面的命令的执行顺序早于，所述保序标识命令的下一个命令的执行顺序；
    将位于所述保序标识命令前面的命令的执行顺序早于，所述保序标识命令的首个命令的确定为目标命令。
  15. 如权利要求12-14任一项所述的方法，其特征在于，为在保序标识命令之前获取到的第一命令添加的序列号与，为在所述保序标识命令之后获取到的首个第一命令添加的序列号不同。
  16. 如权利要求12-15任一项所述的方法，其特征在于，所述封装还包括：为所述多个第一命令中的除所述目标命令外的第一命令添加顺序标识。
  17. 一种数据处理方法，其特征在于，所述方法包括：
    并行地接收多个第二命令；
    对第二命令进行解封装，得到第一命令，解封装包括解析第二命令包括的第一命令和顺序标识，所述顺序标识用于指示多个有保序要求的命令的执行顺序；
    根据所述顺序标识，调度多个第一命令。
  18. 如权利要求17所述的方法，其特征在于，所述顺序标识为序列号；
    所述根据所述顺序标识，调度多个第一命令，包括：
    按照所述序列号由数值大小，调度所述多个第一命令。
  19. 一种计算机可读存储介质，其特征在于，用于存储计算机程序，所述计算机程序包括用于实现权利要求12-16任一项所述的方法的指令，或者实现权利要求17或18所述的方法的指令。
  20. 一种计算机程序产品，其特征在于，所述计算机程序产品包括：计算机程序代码，当所述计算机程序代码在计算机上运行时，使得计算机执行如权利要求12-16任一项所述的方法，或者执行如权利要求17或18任一项所述的方法。
PCT/CN2021/097050 2021-05-29 2021-05-29 一种数据处理方法及装置 WO2022251984A1 (zh)

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