CN112286446B - Storage device and control method thereof - Google Patents
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- CN112286446B CN112286446B CN202010982028.5A CN202010982028A CN112286446B CN 112286446 B CN112286446 B CN 112286446B CN 202010982028 A CN202010982028 A CN 202010982028A CN 112286446 B CN112286446 B CN 112286446B
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- 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
- G06F3/0607—Improving or facilitating administration, e.g. storage management by facilitating the process of upgrading existing storage systems, e.g. for improving compatibility between host and storage device
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- 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
- G06F3/0629—Configuration or reconfiguration of storage systems
- G06F3/0631—Configuration or reconfiguration of storage systems by allocating resources to storage systems
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- 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
- G06F3/0638—Organizing or formatting or addressing of data
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- 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]
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- 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
- G06F3/0683—Plurality of storage devices
- G06F3/0689—Disk arrays, e.g. RAID, JBOD
Abstract
The invention discloses a storage device and a control method thereof, wherein an application system at least executes the following steps: step S1: the application system identifies the storage device as N logical address spaces; step S2: configuring the working mode of the storage device into a first mode or a second mode according to the configuration instruction; and step S3: when the data storage device is configured to be in a first mode, the application system equally divides data to be written into N sub-data and simultaneously performs data access operation on N logical address spaces; when the application system is configured in the second mode, the application system performs data access operation on the storage device through any port, and when the port fails, performs data access operation on the storage device at the selected other port. By adopting the technical scheme of the invention, the storage device can be configured according to the actual application requirement to improve the storage bandwidth or the storage path backup, thereby fully utilizing the interface bandwidth of the storage disk, ensuring the real double activity of the storage disk and realizing the busy-time double activity and idle-time backup.
Description
Technical Field
The present invention relates to the field of storage technologies, and in particular, to a storage device and a control method thereof.
Background
In the big data era, the bandwidth requirements of storage devices are increasing due to the explosive growth of server business requirements. PCIE and SAS interfaces are mainstream server storage interfaces at present, and protocols of the two interfaces support Dual Active (Dual Active) characteristics.
However, most systems currently use dual ports for storage devices, which are only limited to "disaster recovery" and "backup", that is, when one port path fails, the storage device is operated through another port path. Some systems without backup functionality use only one port of the storage device so that the second port, which could otherwise be "live" is dummy.
In the existing system, the second port of the storage device with dual active functions is used as a disaster recovery port, and the disaster recovery port of the backup host and the storage device is started only when one of the backup hosts goes down. For a storage device with dual ports and supporting a dual-active function, the port performance of the storage device is not exerted to the utmost extent, and the waste of port bandwidth resources is caused in certain application occasions.
Therefore, in order to overcome the above-mentioned drawbacks of the prior art, it is necessary to provide a solution.
Disclosure of Invention
In order to overcome the defects in the prior art, it is necessary to provide a storage apparatus and a control method thereof, where an application system can map the apparatus into multiple storage devices by setting a logic unit matched with the number of ports, so as to improve the bandwidth utilization rate of a dual active interface.
In order to solve the technical problems in the prior art, the technical scheme of the invention is as follows:
a storage device at least comprises a plurality of ports and logic units with the number matched with that of the ports, wherein all the ports are connected with an application system, any logic unit is connected with all the ports, and the logic units are used for mapping the storage units into different logic address spaces.
As a further improvement, the storage device at least includes a first port, a second port, a first logic unit, a second logic unit, and a storage unit, where the first port is connected to the first logic unit and the second logic unit, the second port is connected to the first logic unit and the second logic unit, the first logic unit is configured to map the storage unit into a first logic address space, and the second logic unit is configured to map the storage unit into a second logic address space.
As a further improvement, the application system performs data access operation on the memory unit through the first port, and simultaneously performs data access operation on the memory unit through the second port.
As a further improvement scheme, the application system carries out data access operation on the storage unit through the first port, and when the first port fails, the application system carries out data access operation on the storage unit through the second port.
As a further improvement scheme, the application system is connected with the first port through the first host computer and is connected with the second port through the second host computer, and the first host computer is connected with the second host computer.
As a further improvement, the first port and the second port employ a PCIE interface or an SAS interface.
As a further improvement, the logic unit is integrated in the port controller.
As a further improvement, the logic unit is integrated in the disk controller or the SSD controller.
As a further improvement scheme, the storage unit is realized by adopting a flash chip.
The invention also discloses a control method of the storage device, the storage device is provided with N ports and N logic units, the application system is connected with all the ports, any port is connected with all the logic units, the logic units are used for mapping the storage units into different logic address spaces, and the application system at least executes the following steps:
step S1: the application system identifies the storage device as N logical address spaces;
step S2: configuring the working mode of the storage device into a first mode or a second mode according to the configuration instruction;
and step S3: when the data storage device is configured to be in a first mode, the application system equally divides data to be written into N sub-data and simultaneously performs data access operation on N logical address spaces; when the application system is configured in the second mode, the application system performs data access operation on the storage device through any port, and when the port fails, the application system performs data access operation on the storage device by selecting other ports.
As a further improvement, in the step S3, when the configuration is in the first mode, the application system obtains a mapping table of actual physical addresses corresponding to each logical address space, and selects a suitable logical address to enable the logical addresses written in different sub-data to correspond to different physical addresses.
As a further improvement, the storage device is provided with 2 ports and 2 logic units, wherein the first port is connected to the first logic unit and the second logic unit, the second port is connected to the first logic unit and the second logic unit, the first logic unit is configured to map the storage unit into a first logic address space, and the second logic unit is configured to map the storage unit into a second logic address space.
As a further improvement, the application system is connected to the first port through a first host, and is connected to the second port through a second host, and the first host is connected to the second host.
Compared with the prior art, the technical scheme of the invention can configure the storage device to improve the storage bandwidth or the backup of the storage path according to the actual application requirement, thereby fully utilizing the interface bandwidth of the storage disk, ensuring the real double activity of the storage disk and realizing the double activity at busy time and the backup at idle time.
Drawings
FIG. 1 is a schematic block diagram of a memory device of the present invention.
FIG. 2 is a schematic block diagram of a dual active backup system using the storage device of the present invention.
FIG. 3 is a diagram of data paths in dual active applications.
Fig. 4 is a schematic diagram of a data path in backup or normal application.
FIG. 5 is a flow chart of a method for controlling a storage device according to the present invention.
The following specific examples will further illustrate the invention in conjunction with the above figures.
Detailed Description
The technical solution provided by the present invention will be further explained with reference to the accompanying drawings.
Some possible terminology of the invention will be briefly described below:
1. PCIE (peripheral component interconnect express): a high speed serial computer expansion bus standard;
2. SAS (Serial Attached SCSI): a computer high-speed serial communication interface, generally used for connecting high-speed storage equipment;
3. LUN (Logic Unit Number): a logic unit for independent access by the computer system;
4. Active-Active (also called Dual Active, double Active): double active, which refers to a state where both ports are working (or active) at a dual-port communication interface;
5. RAID (Redundant Arrays of Independent Disks, disk array): data is usually divided into a plurality of blocks, and the blocks are stored in a disk array respectively, and some RAID algorithms need disks to store check data to complete a data recovery function. Common algorithms are RAID0 and RAID 1RAID 5.
The applicant researches and discovers that the reason for wasting bandwidth resources of the 'double-active' port is that most of the existing hard disks are configured by a logic unit, so that the existing general system can only enumerate one port of the same terminal storage device, and if the two ports are enumerated, one port can be removed; meanwhile, most system group arrays (such as RAID0 arrays) use logical units as basic operation units, which also causes difficulty for the system to two port group arrays of one hard disk.
The invention provides a storage device, which at least comprises a plurality of ports and logic units, wherein the number of the logic units is matched with that of the ports, all the ports are connected with an application system, any logic unit is connected with all the ports, and the logic units are used for mapping the storage units into different logic address spaces.
In the technical scheme, the storage disk is set into a plurality of logic units matched with the number of the ports, so that application systems connected to the storage device can share data connected to the same storage device, and the storage bandwidth is improved.
Based on the storage device with the above structure, the present invention further discloses a control method of the storage device, referring to fig. 5, which is a flow chart thereof, wherein the storage device is provided with N ports and N logic units, an application system is connected with all the ports, any port is connected with all the logic units, the logic units are used for mapping the storage units into different logic address spaces, and the application system at least executes the following steps:
step S1: the application system identifies the storage device as N logical address spaces;
step S2: configuring the working mode of the storage device into a first mode or a second mode according to the configuration instruction;
and step S3: when the data access device is configured to be in a first mode, the application system equally divides the data to be written into N sub-data and simultaneously performs data access operation on N logical address spaces; when the application system is configured in the second mode, the application system performs data access operation on the storage device through any port, and when the port fails, performs data access operation on the storage device at the selected other port.
By adopting the technical scheme, the application system can conveniently map the storage device into different logical address spaces due to the arrangement of the plurality of ports and the plurality of logical units in the storage device; and the data to be stored is segmented and written into different logical address spaces simultaneously, so that the interface bandwidth of the storage device is fully utilized, and the actual data storage bandwidth is improved. Meanwhile, the working mode of the storage device can be configured according to the actual application requirements, so that the storage disk is really double-active, and the functional requirements of busy-time double-active and idle-time backup are realized.
Although the storage device can map the actual physical address of the storage unit into different logical address spaces, different logical addresses may correspond to the same physical address in the actual reading and writing process, thereby causing address conflict in the data access process. In order to overcome the technical defect, in step S3, when the configuration is the first mode, the application system obtains a mapping table of actual physical addresses corresponding to each logical address space, and selects a suitable logical address according to the mapping table so that the logical addresses written in different sub-data correspond to different physical addresses, thereby effectively avoiding address collision; of course, other technical means can be used to avoid address conflict, and the technical purpose of the present invention can be achieved.
Referring to fig. 1, a schematic block diagram of a preferred embodiment of the present invention is shown, in which a memory device is provided with 2 ports and 2 logic units, that is, a dual active memory device, and includes at least a first port, a second port, a first logic unit, a second logic unit, and a memory unit, where the first port is connected to the first logic unit and the second logic unit, the second port is connected to the first logic unit and the second logic unit, the first logic unit is configured to map the memory unit into a first logic address space, and the second logic unit is configured to map the memory unit into a second logic address space.
In the above technical solution, since the first logic unit and the second logic unit are arranged, the storage unit can be mapped into two different logical address spaces, and the application system can configure the storage device according to actual application requirements to improve storage bandwidth or storage path backup.
In some application occasions, a larger storage bandwidth is needed, the application system performs data access operation on the storage unit through the first port, performs data access operation on the storage unit through the second port at the same time, and performs access operation on the storage unit through the two ports at the same time, so that the storage bandwidth can be doubled, and the storage efficiency is greatly improved.
In addition, in some application occasions, it is necessary to improve the stability and security of the system, that is, to implement "disaster recovery" and "backup", in this case, the application system performs data access operation on the storage unit through the first port, the second port is used as a backup, and when the first port fails, the data access operation is performed on the storage unit through the second port.
In a preferred embodiment, the logic unit is integrated in the port controller. PCIE and SAS interfaces are mainstream server storage interfaces at present, and protocols of the two interfaces support Dual Active (Dual Active) characteristics. When the first port and the second port adopt PCIE interfaces or SAS interfaces, the logic unit is integrated in the PCIE or SAS controller. Of course, the logic unit is integrally provided in the disk controller or the SSD controller. When the storage unit adopts a flash chip, the logic unit is realized by the existing flash controller. By adopting the technical scheme, the function of the logic unit can be realized on the basis of the existing hardware architecture.
In a preferred embodiment, the storage device of the present invention can be used to construct a high-speed dual active backup system, whose functional structure is shown in fig. 2, and the application system is connected to the first port through the first host, and connected to the second port through the second host. By adopting the framework of FIG. 2, the system has more universality in practical application, and can realize the function of double-activity speed increase by small change; if the application system is directly connected with the double-active storage device, the existing operating system, file system, bottom layer driver and the like need to be greatly changed to realize the double-active speed-up function.
As shown in fig. 2, two ports of the dual active storage device are respectively connected to a first host and a second host, which are connected in some manner, (for example, the first host and the second host are two hosts of a distributed storage system), and two LUNs are located in the dual active storage disk. As shown in fig. 1, a first host can access LUN 1 and LUN 2 through a first port, and a second host can also access LUN 1 and LUN 2 through a second port.
As shown in fig. 3, the application system accesses the active-active storage device through the first host and the second host, and the application data is distributed on LUN 1 and LUN 2 of the active-active disk; thereby doubling the storage bandwidth.
The system also supports a traditional backup application scenario, as shown in fig. 4, for example, the second host serves as a backup path, and when the system normally works, the backup path does not work, and the first host accesses data of LUN 1 and LUN 2 through port 1; when the first host is down, the second host works, and the second host accesses the data of the LUN 1 and the LUN 2 through the port 2.
By adopting the technical scheme, the solid state disk based on the SAS or PCIE interface can be designed into two or more LUNs matched with the SAS or PCIE double-port bandwidth, preferably, a tiny INIC7621 chip is adopted, two SATA disks are carried and respectively marked as LUN 1 and LUN 2, and the method is simple and convenient.
In addition, the application on two hosts connecting two ports of the dual active storage hard disk supports RAID0 operation of two LUNs in a single storage device, and at the same time, host 1 accesses LUN 1 through port 1 and host 2 accesses LUN 2 through port 2. After two LUNs in a single storage device are grouped into RAID0, there is no impact on the old applications (i.e., applications that do not use dual port RAID0 operations) because the old applications can poll for access to LUN 1 and LUN 2 through port 1 or port 2.
The above description of the embodiments is only intended to facilitate the understanding of the method of the invention and its core idea. It should be noted that, for those skilled in the art, it is possible to make various improvements and modifications to the present invention without departing from the principle of the present invention, and those improvements and modifications also fall within the scope of the claims of the present invention.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (7)
1. A storage device is characterized by at least comprising a plurality of ports and logic units, wherein the number of the logic units is matched with that of the ports, all the ports are connected with an application system, any one logic unit is connected with all the ports, and the logic units are used for mapping the storage units into different logic address spaces;
the storage device at least comprises a first port, a second port, a first logic unit, a second logic unit and a storage unit, wherein the first port is connected with the first logic unit and the second logic unit, the second port is connected with the first logic unit and the second logic unit, the first logic unit is used for mapping the storage unit into a first logic address space, and the second logic unit is used for mapping the storage unit into a second logic address space;
the application system performs data access operation on the storage unit through the first port, and simultaneously performs data access operation on the storage unit through the second port.
2. The storage device of claim 1, wherein the application system performs data access operations on the storage unit through the first port, and performs data access operations on the storage unit through the second port when the first port fails.
3. The storage device of claim 2, wherein the application system is connected to the first port via a first host and connected to the second port via a second host, the first host being connected to the second host.
4. The storage device of claim 2, wherein the first port and the second port employ a PCIE interface or an SAS interface.
5. The memory device according to claim 1 or 2, wherein the logic unit is integrated in the port controller.
6. The storage device according to claim 1 or 2, wherein the logic unit is integrated in a disk controller or an SSD controller.
7. A control method of a storage device is characterized in that the storage device is provided with N ports and N logic units, an application system is connected with all the ports, any port is connected with all the logic units, the logic units are used for mapping the storage units into different logic address spaces, and the application system at least executes the following steps:
step S1: the application system identifies the storage device as N logical address spaces;
step S2: configuring the working mode of the storage device into a first mode or a second mode according to the configuration instruction;
and step S3: when the data access device is configured to be in a first mode, the application system equally divides the data to be written into N sub-data and simultaneously performs data access operation on N logical address spaces; when the application system is configured to be in the second mode, the application system performs data access operation on the storage device through any port, and when the port fails, the application system selects other ports to perform data access operation on the storage device;
in step S3, when the configuration is in the first mode, the application system obtains the mapping table of the actual physical addresses corresponding to the respective logical address spaces, and selects a suitable logical address to enable the logical addresses written in by different sub-data to correspond to different physical addresses.
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| CN101815036A (en) * | 2010-04-21 | 2010-08-25 | 中兴通讯股份有限公司 | Method and device for realizing access control |
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| CN201887786U (en) * | 2011-01-25 | 2011-06-29 | 北京同有飞骥科技股份有限公司 | High-performance NRS sharing Cache structure |
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