CN110727639B - Fragment data reading method, electronic device, system and medium - Google Patents
Fragment data reading method, electronic device, system and medium Download PDFInfo
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- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F16/00—Information retrieval; Database structures therefor; File system structures therefor
- G06F16/10—File systems; File servers
- G06F16/11—File system administration, e.g. details of archiving or snapshots
- G06F16/113—Details of archiving
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F16/00—Information retrieval; Database structures therefor; File system structures therefor
- G06F16/10—File systems; File servers
- G06F16/16—File or folder operations, e.g. details of user interfaces specifically adapted to file systems
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- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F16/00—Information retrieval; Database structures therefor; File system structures therefor
- G06F16/10—File systems; File servers
- G06F16/17—Details of further file system functions
- G06F16/1727—Details of free space management performed by the file system
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- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F21/00—Security arrangements for protecting computers, components thereof, programs or data against unauthorised activity
- G06F21/60—Protecting data
- G06F21/602—Providing cryptographic facilities or services
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- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F21/00—Security arrangements for protecting computers, components thereof, programs or data against unauthorised activity
- G06F21/70—Protecting specific internal or peripheral components, in which the protection of a component leads to protection of the entire computer
- G06F21/78—Protecting specific internal or peripheral components, in which the protection of a component leads to protection of the entire computer to assure secure storage of data
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F2221/00—Indexing scheme relating to security arrangements for protecting computers, components thereof, programs or data against unauthorised activity
- G06F2221/21—Indexing scheme relating to G06F21/00 and subgroups addressing additional information or applications relating to security arrangements for protecting computers, components thereof, programs or data against unauthorised activity
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Abstract
The invention provides a fragment data reading method, electronic equipment, a system and a medium, wherein the method comprises the following steps: when a reading request is received, extracting a first identity identification code and a second identity identification code from the reading request; determining a target disk according to the first identity identification code; extracting the writing position of fragment data to be read from a database corresponding to the target disk according to the second identity identification code; analyzing the writing position to obtain a third identity identification code and the offset of the fragment data to be read in a target entity file corresponding to the third identity identification code; determining a file path of the target entity file from the database according to the third identity identification code; determining the storage position of the fragment data to be read in the target disk according to the file path and the offset; and reading the fragment data to be read from the storage position. The invention can solve the problem that the fragment data cannot be read.
Description
Technical Field
The present invention relates to the field of data processing technologies, and in particular, to a fragment data reading method, an electronic device, a system, and a medium.
Background
At present, file data is cut into a plurality of fragment data and then stored, so that the storage space of a magnetic disk can be reasonably utilized, and the mode of storing the fragment data is trending. However, since the fragment data is not stored in the form of a single file, the fragment data cannot be directly read by opening the file name, and thus the fragment data cannot be read.
Disclosure of Invention
The invention mainly aims to provide a fragment data reading method, electronic equipment, a system and a medium, and aims to solve the problem that fragment data cannot be read.
In order to achieve the above object, the present invention provides a fragment data reading method, the method comprising:
when a reading request is received, extracting a first identity identification code and a second identity identification code from the reading request;
determining a target disk according to the first identity identification code;
extracting the writing position of fragment data to be read from a database corresponding to the target disk according to the second identity identification code;
analyzing the writing position to obtain a third identity identification code and the offset of the fragment data to be read in a target entity file corresponding to the third identity identification code;
Determining a file path of the target entity file from the database according to the third identity identification code;
determining the storage position of the fragment data to be read in the target disk according to the file path and the offset;
and reading the fragment data to be read from the storage position.
Preferably, the method further comprises:
when a storage instruction is received, selecting a disk corresponding to each fragment data from all the disks as a first disk;
judging whether the storage space of the current entity file in the first disk is fully written;
when the storage space is determined not to be fully written, writing the fragment data into the storage space to obtain a writing position of the fragment data;
acquiring an identity identification code of the fragment data;
and storing the corresponding relation between the identification code of the fragment data and the writing position into the database.
Preferably, the information in the database comprises one or a combination of the following:
the corresponding relation between the identity identification code of the entity file and the file path, and the corresponding relation between the identity identification code of the fragment data and the writing position of the fragment data.
Preferably, the writing position of the fragment data to be read includes one or more of the following combinations:
and the third identity identification code of the target entity file and the offset of the fragment data to be read in the target entity file.
Preferably, a plurality of entity files are stored in the target disk.
Preferably, after reading the fragment data to be read from the storage location, the method further comprises:
encrypting the fragment data to be read to obtain a target ciphertext;
and responding to the read request by the target ciphertext.
To achieve the above object, the present invention further provides an electronic device including:
a memory storing at least one instruction; a kind of electronic device with high-pressure air-conditioning system
And the processor executes the instructions stored in the memory to realize the fragment data reading method.
Preferably, the electronic device is a node constituting a content distribution network or a blockchain network.
To achieve the above object, the present invention further provides a fragment data reading system, comprising:
the device comprises an extraction unit, a reading unit and a processing unit, wherein the extraction unit is used for extracting a first identity identification code and a second identity identification code from a read request when the read request is received;
The determining unit is used for determining a target disk according to the first identity identification code;
the extracting unit is further configured to extract a writing position of fragment data to be read from a database corresponding to the target disk according to the second identification code;
the analysis unit is used for analyzing the writing position to obtain a third identity identification code and the offset of the fragment data to be read in the target entity file corresponding to the third identity identification code;
the determining unit is further configured to determine a file path of the target entity file from the database according to the third identity code;
the determining unit is further configured to determine a storage position of the fragment data to be read in the target disk according to the file path and the offset;
and the reading unit is used for reading the fragment data to be read from the storage position.
Preferably, the system further comprises:
the selecting unit is used for selecting a disk corresponding to each fragment data from all the disks as a first disk when a storage instruction is received;
the judging unit is used for judging whether the storage space of the current entity file in the first disk is full;
The writing unit is used for writing the fragment data into the storage space when the storage space is determined not to be full, so as to obtain the writing position of the fragment data;
the acquisition unit is used for acquiring the identification code of the fragment data;
and the storage unit is used for storing the corresponding relation between the identification code of the fragment data and the writing position into the database.
Preferably, the information in the database comprises one or a combination of the following:
the corresponding relation between the identity identification code of the entity file and the file path, and the corresponding relation between the identity identification code of the fragment data and the writing position of the fragment data.
Preferably, the writing position of the fragment data to be read includes one or more of the following combinations:
and the third identity identification code of the target entity file and the offset of the fragment data to be read in the target entity file.
Preferably, a plurality of entity files are stored in the target disk.
Preferably, the system further comprises:
the encryption unit is used for encrypting the fragment data to be read after the fragment data to be read is read from the storage position to obtain a target ciphertext;
And the response unit is used for responding to the read request by the target ciphertext.
To achieve the above object, the present invention further provides a computer-readable storage medium having stored thereon a fragment data reading program executable by one or more processors to implement the fragment data reading method.
In summary, when a read request is received, the method extracts the first identity code and the second identity code from the read request, determines the target disk according to the first identity code, extracts the writing position of the fragment data to be read from the database corresponding to the target disk according to the second identity code, analyzes the writing position to obtain the third identity code and the offset of the fragment data to be read in the target entity file corresponding to the third identity code, determines the file path of the target entity file from the database according to the third identity code, determines the storage position of the fragment data to be read in the target disk according to the file path and the offset, and reads the fragment data to be read from the storage position, thereby solving the problem that the fragment data cannot be read.
Drawings
FIG. 1 is a flow chart of an embodiment of the present application;
FIG. 2 is a schematic diagram illustrating an internal structure of an electronic device according to an embodiment of the application;
FIG. 3 is a schematic diagram of functional blocks of the fragment data reading system of the present application;
description of the main reference signs
| Electronic equipment | 1 |
| Memory device | 12 |
| Processor and method for controlling the same | 13 |
| Fragment data reading system | 11 |
| Extraction unit | 110 |
| Determination unit | 111 |
| Analysis unit | 112 |
| Reading unit | 113 |
| Selecting unit | 114 |
| Judgment unit | 115 |
| Writing unit | 116 |
| Acquisition unit | 117 |
| Memory cell | 118 |
| Encryption unit | 119 |
| Response unit | 120 |
| Creation unit | 121 |
Detailed Description
The present application will be described in further detail with reference to the drawings and examples, in order to make the objects, technical solutions and advantages of the present application more apparent. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the application. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to be within the scope of the application.
The terms "first," "second," "third," "fourth" and the like in the description and in the claims and in the above drawings, if any, are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used may be interchanged where appropriate such that the embodiments described herein may be implemented in other sequences than those illustrated or otherwise described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
It should be noted that the description of "first", "second", etc. in this disclosure is for descriptive purposes only and is not to be construed as indicating or implying a relative importance or implying an indication of the number of technical features being indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In addition, the technical solutions of the embodiments may be combined with each other, but it is necessary to base that the technical solutions can be realized by those skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should be considered to be absent and not within the scope of protection claimed in the present invention.
The invention provides a fragment data reading method.
Referring to fig. 1, fig. 1 is a flow chart of an embodiment of the present invention. The order of the steps in the flow diagram may be changed and some steps may be omitted according to different needs.
The fragment data reading method is applied to one or more electronic devices, wherein the electronic devices are devices capable of automatically performing numerical calculation and/or information processing according to preset or stored instructions, and the hardware of the electronic devices comprises, but is not limited to, microprocessors, application specific integrated circuits (Application Specific Integrated Circuit, ASICs), programmable gate arrays (Field-Programmable Gate Array, FPGAs), digital processors (Digital Signal Processor, DSPs), embedded devices and the like.
The electronic device may be any electronic product that can interact with a user in a human-computer manner, such as a personal computer, tablet computer, smart phone, personal digital assistant (Personal Digital Assistant, PDA), game console, interactive internet protocol television (Internet Protocol Television, IPTV), smart wearable device, etc.
The electronic device may also include a network device and/or a user device. Wherein the network device includes, but is not limited to, a single network server, a server group composed of a plurality of network servers, or a Cloud based Cloud Computing (Cloud Computing) composed of a large number of hosts or network servers.
The network in which the electronic device is located includes, but is not limited to, the internet, a wide area network, a metropolitan area network, a local area network, a virtual private network (Virtual Private Network, VPN), and the like.
In one embodiment, the method comprises:
s10, when a reading request is received, the first identity identification code and the second identity identification code are extracted from the reading request.
In at least one embodiment of the present invention, the contents of the read request include, but are not limited to: the first identity code, the second identity code, etc., wherein the number of bits of the first identity code may be inconsistent with the number of bits of the second identity code.
In at least one embodiment of the present invention, the electronic device extracts last file information from the linked list of the target disk, and determines a file corresponding to the last file information as the current entity file.
Further, file information of at least one entity file is stored in the linked list.
Wherein, the content of the file information includes, but is not limited to: creation time of file, file name, etc.
By the embodiment, the current entity file can be quickly determined from the linked list.
In at least one embodiment of the invention, the method further comprises:
when a storage instruction is received, the electronic device selects a disk corresponding to each piece of fragment data from all the disks as a first disk, further, the electronic device judges whether a storage space where a current entity file in the first disk is located is full, and when the storage space is determined not to be full, the electronic device writes the piece of fragment data into the storage space to obtain a writing position of the piece of fragment data, further, the electronic device acquires an identification code of the piece of fragment data, and the electronic device stores a corresponding relation between the identification code of the piece of fragment data and the writing position into the database.
And when the fragment data is stored, the corresponding relation between the identification code of the fragment data and the writing position is stored, so that the fragment data can be directly read through the information stored in the database when the fragment data is read, and the problem that the fragment data cannot be read can be solved.
In at least one embodiment of the present invention, the electronic device selects, from all the disks, a disk corresponding to each fragment data, and includes, as a first disk:
the electronic equipment acquires the input/output queue of each disk in all the disks, determines a target input/output queue with the shortest column length in the input/output queue according to the column length of the input/output queue, determines the disk corresponding to the target input/output queue as the first disk, acquires the residual space in the disk if the column length of the input/output queue of the disk is equal, determines the target residual space with the largest space in the residual space according to the residual space, and determines the disk corresponding to the target residual space as the first disk.
For example: all the magnetic disks are magnetic disk A, magnetic disk B and magnetic disk C respectively, 5 input/outputs are arranged in an input/output queue of the magnetic disk A, 8 input/outputs are arranged in an input/output queue of the magnetic disk B, 5 input/outputs are arranged in an input/output queue of the magnetic disk C, the electronic equipment determines that the column lengths of the input/output queues of the magnetic disk A and the magnetic disk C are shortest and equal, further, the electronic equipment obtains that the residual space of the magnetic disk A is 200M and the residual space of the magnetic disk C is 400M, and further, the electronic equipment determines that the magnetic disk C is the first magnetic disk.
In at least one embodiment of the present invention, the determining, by the electronic device, whether the storage space where the current entity file is located in the first disk is full includes:
the electronic device obtains all storage blocks in the storage space where the current entity file is located, further, the electronic device judges whether bitmap flag bits in each storage block are set, when the bitmap flag bits in each storage block are set, the electronic device determines that the storage space where the current entity file is located is full, or when the bitmap flag bits in the storage block are not set, the electronic device determines that the storage space where the current entity file is located is not full.
For example: the electronic equipment acquires 8 blocks of all storage blocks in the storage space where the current entity file A is located, further judges whether the bitmap flag bit of each storage block in the 8 storage blocks is set, and when the bitmap flag bit of the storage block is not 1, the electronic equipment determines that the storage space where the current entity file A is located is not fully written.
By the embodiment, the storage state of the storage space where the current entity file is located can be quickly determined, so that the writing position of the fragment data can be determined.
In at least one embodiment of the present invention, when it is determined that the storage space is full, the method further comprises:
and the electronic equipment creates a new entity file in the first disk to obtain first information, and further, the electronic equipment stores the first information into a database corresponding to the first disk.
Wherein the first information includes: the corresponding relation between the identification code of the new entity file and the file path of the new entity file, the creation time of the new entity file and the like.
Further, the database stores first information of a plurality of entity files.
By storing the first information into the database, basic information is provided for subsequent response to the reading request, and reading of fragment data is facilitated.
Specifically, the creating, by the electronic device, a new entity file in the first disk includes:
the electronic equipment acquires the allocated identity identification code and the file name, and further, the electronic equipment occupies a storage space with a preset size in the first disk according to the identity identification code and the file name to obtain the new entity file and the first information corresponding to the new entity file.
S11, determining a target disk according to the first identity identification code.
In at least one embodiment of the present invention, a plurality of entity files are stored in the target disk.
In at least one embodiment of the invention, the identity of each disk is unique, and therefore the electronic device is able to determine the target disk by means of the first identity.
S12, extracting the writing position of the fragment data to be read from the database corresponding to the target disk according to the second identity code.
In at least one embodiment of the present invention, the information in the database includes, but is not limited to, one or a combination of the following:
correspondence between the identity code of the entity file and the file path, correspondence between the identity code of the fragment data and the writing position of the fragment data, and the like.
Wherein the database may be a key-value database, for example: the LevelDB database, the present invention is not limited.
In at least one embodiment of the present invention, the writing location of the fragment data to be read includes, but is not limited to, one or more of the following combinations:
and the third identity identification code of the target entity file, the offset of the fragment data to be read in the target entity file and the like.
In at least one embodiment of the present invention, the extracting, by the electronic device, the writing location of the fragment data to be read from the database corresponding to the target disk according to the second identification code includes:
and the electronic equipment traverses the information in the database according to the second identity identification code to obtain second information of the fragment data to be read, and further, the electronic equipment adopts a machine learning method to extract the writing position of the fragment data to be read from the second information.
Wherein the second information includes: the second identification code of the fragment data to be read, the writing position of the fragment data to be read, metadata information of the fragment data to be read and the like.
Through the embodiment, the writing position can be extracted through the second identification code, and a basis is provided for subsequent reading of the fragment data to be read.
S13, analyzing the writing position to obtain a third identity identification code and the offset of the fragment data to be read in the target entity file corresponding to the third identity identification code.
In at least one embodiment of the present invention, since the information stored in the database is serialized information, the third id and the offset can be obtained by analyzing the writing position.
In at least one embodiment of the present invention, the electronic device analyzes the writing position by using an anti-serialization method to obtain a third identification code and an offset of the fragment data to be read in the target entity file corresponding to the third identification code.
S14, determining the file path of the target entity file from the database according to the third identity identification code.
In at least one embodiment of the present invention, the database stores the correspondence between the id of the entity file and the file path, so the electronic device can determine the file path corresponding to the entity file according to the id of the entity file.
In at least one embodiment of the present invention, the determining, from the database, the file path of the target entity file according to the third id includes:
and the electronic equipment determines the corresponding relation of the third identity code from the database according to the third identity code, and further determines the content corresponding to the third identity code as a file path of the target entity file.
S15, determining the storage position of the fragment data to be read in the target disk according to the file path and the offset.
In at least one embodiment of the present invention, the storage location refers to a space that is occupied by the fragment data to be read alone in the target disk.
S16, reading the fragment data to be read from the storage position.
In at least one embodiment of the present invention, the reading the fragment data to be read from the storage location includes:
the electronic equipment traverses a storage position in the target disk, and further, the electronic equipment extracts data stored in the storage position to obtain the fragment data to be read.
By the embodiment, the space occupied by the fragment data alone can be indexed, so that the fragment data can be accurately read, and the problem that the fragment data cannot be read is solved.
In at least one embodiment of the present invention, after reading the fragment data to be read from the storage location, the method further comprises:
and the electronic equipment encrypts the fragment data to be read to obtain a target ciphertext, and further responds to the reading request by the target ciphertext.
By the embodiment, the data to be read can be prevented from being tampered and the data to be read can be prevented from being leaked, and the safety of the data to be read can be improved.
In summary, when a read request is received, the method extracts the first identity code and the second identity code from the read request, determines the target disk according to the first identity code, extracts the writing position of the fragment data to be read from the database corresponding to the target disk according to the second identity code, analyzes the writing position to obtain the third identity code and the offset of the fragment data to be read in the target entity file corresponding to the third identity code, determines the file path of the target entity file from the database according to the third identity code, determines the storage position of the fragment data to be read in the target disk according to the file path and the offset, and reads the fragment data to be read from the storage position, thereby solving the problem that the fragment data cannot be read.
Referring to fig. 2, fig. 2 is a schematic diagram illustrating an internal structure of an electronic device according to an embodiment of the invention.
The electronic device 1 may be a node constituting a content distribution network or a blockchain network.
The electronic device 1 may comprise a memory 12, a processor 13 and a bus, and may further comprise a computer program, such as a fragment data reading program, stored in the memory 12 and executable on the processor 13.
It will be appreciated by those skilled in the art that the schematic diagram is merely an example of the electronic device 1 and does not constitute a limitation of the electronic device 1, and may comprise more or less components than illustrated, or may combine certain components, or different components, e.g. the electronic device 1 may further comprise input-output devices, network access devices, etc.
The memory 12 includes at least one type of readable storage medium including flash memory, a removable hard disk, a multimedia card, a card memory (e.g., SD or DX memory, etc.), magnetic memory, magnetic disk, optical disk, etc. The memory 12 may in some embodiments be an internal storage unit of the electronic device 1, such as a mobile hard disk of the electronic device 1. The memory 12 may in other embodiments also be an external storage device of the electronic device 1, such as a plug-in mobile hard disk, a Smart Media Card (SMC), a Secure Digital (SD) Card, a Flash memory Card (Flash Card) or the like, which are provided on the electronic device 1. Further, the memory 12 may also include both an internal storage unit and an external storage device of the electronic device 1. The memory 12 may be used not only for storing application software installed in the electronic device 1 and various types of data, such as codes of a fragment data reading program, but also for temporarily storing data that has been output or is to be output.
The processor 13 may in some embodiments be a central processing unit (Central Processing Unit, CPU), controller, microcontroller, microprocessor or other data processing chip for running program code or processing data stored in the memory 12, e.g. executing a fragment data read program or the like.
The bus may be a peripheral component interconnect standard (peripheral component interconnect, PCI) bus or an extended industry standard architecture (extended industry standard architecture, EISA) bus, among others. The bus may be classified as an address bus, a data bus, a control bus, etc. For ease of illustration, only one arrow is shown in FIG. 2, but not only one bus or type of bus.
Illustratively, the computer program may be partitioned into one or more modules/units that are stored in the memory 12 and executed by the processor 13 to complete the present invention. The one or more modules/units may be a series of instruction segments of a computer program capable of performing a specific function for describing the execution of the computer program in the electronic device 1. For example, the computer program may be divided into an extracting unit 110, a determining unit 111, an analyzing unit 112, a reading unit 113, a selecting unit 114, a judging unit 115, a writing unit 116, an acquiring unit 117, a storing unit 118, an encrypting unit 119, a responding unit 120, and a creating unit 121.
Further, the electronic device may also comprise a network interface, which may optionally comprise a wired interface and/or a wireless interface (e.g. WI-FI interface, bluetooth interface, etc.), typically used for establishing a communication connection between the electronic device 1 and other electronic devices.
Optionally, the electronic device 1 may further comprise a user interface, which may comprise a Display (Display), an input unit such as a Keyboard (Keyboard), and a standard wired interface, a wireless interface. Alternatively, in some embodiments, the display may be an LED display, a liquid crystal display, a touch-sensitive liquid crystal display, an OLED (Organic Light-Emitting Diode) touch, or the like. The display may also be referred to as a display screen or display unit, as appropriate, for displaying information processed in the electronic device 1 and for displaying a visual user interface.
The integrated modules/units of the electronic device 1 may be stored in a computer readable storage medium if implemented in the form of software functional units and sold or used as separate products. Based on such understanding, the present invention may implement all or part of the flow of the method of the above embodiment, or may be implemented by a computer program to instruct related hardware, where the computer program may be stored in a computer readable storage medium, and when the computer program is executed by a processor, the computer program may implement the steps of each of the method embodiments described above.
Wherein the computer program comprises computer program code which may be in source code form, object code form, executable file or some intermediate form etc. The computer readable medium may include: any entity or device capable of carrying the computer program code, a recording medium, a U disk, a removable hard disk, a magnetic disk, an optical disk, a computer Memory, a Read-Only Memory (ROM).
Fig. 2 shows only the electronic device 1 with components 12-13, and a fragment data reading procedure, it being understood by a person skilled in the art that the structure shown in fig. 2 does not constitute a limitation of the electronic device 1, and may comprise fewer or more components than shown, or may combine certain components, or a different arrangement of components.
In connection with fig. 1, the memory 12 in the electronic device 1 stores a plurality of instructions to implement a fragment data reading method, the processor 13 being executable to implement: when a reading request is received, extracting a first identity identification code and a second identity identification code from the reading request; determining a target disk according to the first identity identification code; extracting the writing position of fragment data to be read from a database corresponding to the target disk according to the second identity identification code; analyzing the writing position to obtain a third identity identification code and the offset of the fragment data to be read in a target entity file corresponding to the third identity identification code; determining a file path of the target entity file from the database according to the third identity identification code; determining the storage position of the fragment data to be read in the target disk according to the file path and the offset; and reading the fragment data to be read from the storage position.
Referring to fig. 3, a functional block diagram of a fragment data reading system according to the present invention is shown. The fragment data reading system 11 includes an extracting unit 110, a determining unit 111, an analyzing unit 112, a reading unit 113, a selecting unit 114, a judging unit 115, a writing unit 116, an acquiring unit 117, a storing unit 118, an encrypting unit 119, a responding unit 120, and a creating unit 121. The module/unit referred to in the present invention refers to a series of computer program segments capable of being executed by the processor 13 and of performing a fixed function, which are stored in the memory 12. In the present embodiment, the functions of the respective modules/units will be described in detail in the following embodiments.
When a read request is received, the extracting unit 110 extracts the first and second ids from the read request.
In at least one embodiment of the present invention, the contents of the read request include, but are not limited to: the first identity code, the second identity code, etc., wherein the number of bits of the first identity code may be inconsistent with the number of bits of the second identity code.
In at least one embodiment of the present invention, the extracting unit 110 extracts last file information from the linked list of the target disk, and determines a file corresponding to the last file information as the current entity file.
Further, file information of at least one entity file is stored in the linked list.
Wherein, the content of the file information includes, but is not limited to: creation time of file, file name, etc.
By the embodiment, the current entity file can be quickly determined from the linked list.
In at least one embodiment of the invention, the method further comprises:
when receiving the storage instruction, the selecting unit 114 selects a disk corresponding to each piece of fragment data from all the disks as a first disk, further, the judging unit 115 judges whether a storage space where a current entity file in the first disk is located is full, when determining that the storage space is not full, the writing unit 116 writes the piece of fragment data into the storage space to obtain a writing position of the piece of fragment data, further, the acquiring unit 117 acquires an identity code of the piece of fragment data, and the storing unit 118 stores a correspondence relationship between the identity code of the piece of fragment data and the writing position into the database.
And when the fragment data is stored, the corresponding relation between the identification code of the fragment data and the writing position is stored, so that the fragment data can be directly read through the information stored in the database when the fragment data is read, and the problem that the fragment data cannot be read can be solved.
In at least one embodiment of the present invention, the selecting unit 114 selects, from all the disks, a disk corresponding to each fragment data, as the first disk, including:
the selecting unit 114 obtains the input/output queue of each disk in the all disks, determines a target input/output queue with the shortest queue length in the input/output queues according to the queue length of the input/output queues, determines the disk corresponding to the target input/output queue as the first disk, and if the queue length of the input/output queue of the disk is equal, the selecting unit 114 obtains the remaining space in the disk, determines the target remaining space with the largest space in the remaining space according to the remaining space, and determines the disk corresponding to the target remaining space as the first disk.
For example: all the disks are disk a, disk B and disk C, 5 input/outputs are in the input/output queue of disk a, 8 input/outputs are in the input/output queue of disk B, and 5 input/outputs are in the input/output queue of disk C, the selecting unit 114 determines that the column lengths of the input/output queues of disk a and disk C are shortest and equal, further, the electronic device obtains that the remaining space of disk a is 200M and the remaining space of disk C is 400M, and further, the selecting unit 114 determines that disk C is the first disk.
In at least one embodiment of the present invention, the determining unit 115 determining whether the storage space where the current entity file exists in the first disk is full includes:
the determining unit 115 obtains all storage blocks in the storage space where the current entity file is located, further, the determining unit 115 determines whether a bitmap flag bit in each storage block is set, when the bitmap flag bit in each storage block is set, the determining unit 115 determines that the storage space where the current entity file is located is full, or when the bitmap flag bit in the existing storage block is not set, the determining unit 115 determines that the storage space where the current entity file is located is not full.
For example: the determining unit 115 obtains 8 blocks of all storage blocks in the storage space where the current entity file a is located, further, the determining unit 115 determines whether the bitmap flag bit of each storage block in the 8 storage blocks is set, and when the bitmap flag bit of the storage block is not 1, the determining unit 115 determines that the storage space where the current entity file a is located is not fully written.
By the embodiment, the storage state of the storage space where the current entity file is located can be quickly determined, so that the writing position of the fragment data can be determined.
In at least one embodiment of the present invention, when it is determined that the storage space is full, the method further comprises:
the creating unit 121 creates a new entity file in the first disk to obtain first information, and further, the storage unit 118 stores the first information in a database corresponding to the first disk.
Wherein the first information includes: the corresponding relation between the identification code of the new entity file and the file path of the new entity file, the creation time of the new entity file and the like.
Further, the database stores first information of a plurality of entity files.
By storing the first information into the database, basic information is provided for subsequent response to the reading request, and reading of fragment data is facilitated.
Specifically, the creating unit 121 creates a new entity file in the first disk includes:
the creating unit 121 obtains the assigned id and the obtained file name, and further, the creating unit 121 occupies a storage space with a preset size in the first disk according to the id and the file name, so as to obtain the new entity file and the first information corresponding to the new entity file.
The determining unit 111 determines the target disk based on the first identity code.
In at least one embodiment of the present invention, a plurality of entity files are stored in the target disk.
In at least one embodiment of the present invention, the identification code of each disk is unique, and thus, the determining unit 111 can determine the target disk through the first identification code.
The extracting unit 110 extracts the writing position of the fragment data to be read from the database corresponding to the target disk according to the second identification code.
In at least one embodiment of the present invention, the information in the database includes, but is not limited to, one or a combination of the following:
the corresponding relation between the identity identification code of the entity file and the file path, the corresponding relation between the identity identification code of the fragment data and the writing position of the fragment data, and the like.
Wherein the database may be a key-value database, for example: the LevelDB database, the present invention is not limited.
In at least one embodiment of the present invention, the writing location of the fragment data to be read includes, but is not limited to, one or more of the following combinations:
and the third identity identification code of the target entity file, the offset of the fragment data to be read in the target entity file and the like.
In at least one embodiment of the present invention, the extracting unit 110 extracts, according to the second id, a writing location of fragment data to be read from a database corresponding to the target disk, where the writing location includes:
the extracting unit 110 traverses the information in the database according to the second identification code to obtain the second information of the fragment data to be read, and further, the extracting unit 110 adopts a machine learning method to extract the writing position of the fragment data to be read from the second information.
Wherein the second information includes: the second identification code of the fragment data to be read, the writing position of the fragment data to be read, metadata information of the fragment data to be read and the like.
Through the embodiment, the writing position can be extracted through the second identification code, and a basis is provided for subsequent reading of the fragment data to be read.
The parsing unit 112 parses the writing position to obtain a third id and an offset of the fragment data to be read in the target entity file corresponding to the third id.
In at least one embodiment of the present invention, since the information stored in the database is serialized information, the third id and the offset can be obtained by analyzing the writing position.
In at least one embodiment of the present invention, the parsing unit 112 parses the writing location by using an anti-serialization method to obtain a third id and an offset of the fragment data to be read in the target entity file corresponding to the third id.
The determining unit 111 determines a file path of the target entity file from the database according to the third id.
In at least one embodiment of the present invention, since the database stores the correspondence between the id of the entity file and the file path, the determining unit 111 can determine the file path corresponding to the entity file according to the id of the entity file.
In at least one embodiment of the present invention, the determining, from the database, the file path of the target entity file according to the third id includes:
the determining unit 111 determines, according to the third id, a correspondence relationship of the third id from the database, and further, the determining unit 111 determines, as a file path of the target entity file, content corresponding to the third id.
The determining unit 111 determines a storage position of the fragment data to be read in the target disk according to the file path and the offset.
In at least one embodiment of the present invention, the storage location refers to a space that is occupied by the fragment data to be read alone in the target disk.
The reading unit 113 reads the fragment data to be read from the storage location.
In at least one embodiment of the present invention, the reading the fragment data to be read from the storage location includes:
the reading unit 113 traverses a storage location in the target disk, and further, the reading unit 113 extracts data stored in the storage location to obtain the fragment data to be read.
By the embodiment, the space occupied by the fragment data alone can be indexed, so that the fragment data can be accurately read, and the problem that the fragment data cannot be read is solved.
In at least one embodiment of the present invention, after reading the fragment data to be read from the storage location, the method further comprises:
the encryption unit 119 encrypts the fragment data to be read to obtain a target ciphertext, and further, the response unit 120 responds to the read request with the target ciphertext.
By the embodiment, the data to be read can be prevented from being tampered and the data to be read can be prevented from being leaked, and the safety of the data to be read can be improved.
In summary, when a read request is received, the method extracts the first identity code and the second identity code from the read request, determines the target disk according to the first identity code, extracts the writing position of the fragment data to be read from the database corresponding to the target disk according to the second identity code, analyzes the writing position to obtain the third identity code and the offset of the fragment data to be read in the target entity file corresponding to the third identity code, determines the file path of the target entity file from the database according to the third identity code, determines the storage position of the fragment data to be read in the target disk according to the file path and the offset, and reads the fragment data to be read from the storage position, thereby solving the problem that the fragment data cannot be read.
In the above embodiments, it may be implemented in whole or in part by software, hardware, firmware, or any combination thereof. When implemented in software, may be implemented in whole or in part in the form of a computer program product.
The computer program product includes one or more computer instructions. When loaded and executed on a computer, produces a flow or function in accordance with embodiments of the present invention, in whole or in part. The computer may be a general purpose computer, a special purpose computer, a computer network, or other programmable apparatus. The computer instructions may be stored in a computer-readable storage medium or transmitted from one computer-readable storage medium to another computer-readable storage medium, for example, the computer instructions may be transmitted from one website, computer, server, or data center to another website, computer, server, or data center by a wired (e.g., coaxial cable, fiber optic, digital Subscriber Line (DSL)) or wireless (e.g., infrared, wireless, microwave, etc.). The computer readable storage medium may be any available medium that can be stored by a computer or a data storage device such as a server, data center, etc. that contains an integration of one or more available media. The usable medium may be a magnetic medium (e.g., floppy Disk, removable hard Disk, magnetic tape), an optical medium (e.g., DVD), or a semiconductor medium (e.g., solid State Disk (SSD)), etc.
It will be clear to those skilled in the art that, for convenience and brevity of description, specific working procedures of the above-described systems, apparatuses and units may refer to corresponding procedures in the foregoing method embodiments, which are not repeated herein.
In the several embodiments provided in the present application, it should be understood that the disclosed systems, devices, and methods may be implemented in other manners. For example, the apparatus embodiments described above are merely illustrative, e.g., the division of the units is merely a logical function division, and there may be additional divisions when actually implemented, e.g., multiple units or components may be combined or integrated into another system, or some features may be omitted or not performed. Alternatively, the coupling or direct coupling or communication connection shown or discussed with each other may be an indirect coupling or communication connection via some interfaces, devices or units, which may be in electrical, mechanical or other form.
The units described as separate units may or may not be physically separate, and units shown as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.
In addition, each functional unit in the embodiments of the present application may be integrated in one processing unit, or each unit may exist alone physically, or two or more units may be integrated in one unit. The integrated units may be implemented in hardware or in software functional units.
The integrated units, if implemented in the form of software functional units and sold or used as stand-alone products, may be stored in a computer readable storage medium. Based on such understanding, the technical solution of the present application may be embodied essentially or in part or all of the technical solution or in part in the form of a software product stored in a storage medium, including instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to perform all or part of the steps of the method according to the embodiments of the present application. And the aforementioned storage medium includes: a usb disk, a removable hard disk, a Read-Only Memory (ROM), a magnetic disk, or an optical disk, or other various media capable of storing program codes.
It should be noted that, the foregoing reference numerals of the embodiments of the present invention are merely for describing the embodiments, and do not represent the advantages and disadvantages of the embodiments. And the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, apparatus, article, or method that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, apparatus, article, or method. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a process, apparatus, article or method that comprises the element.
The foregoing description is only of the preferred embodiments of the present invention, and is not intended to limit the scope of the invention, but rather is intended to cover any equivalents of the structures or equivalent processes disclosed herein or in the alternative, which may be employed directly or indirectly in other related arts.
Claims (10)
1. A method of fragment data reading, the method comprising:
when a reading request is received, extracting a first identity identification code and a second identity identification code from the reading request;
Determining a target disk according to the first identity identification code;
extracting the writing position of fragment data to be read from a database corresponding to the target disk according to the second identity identification code;
analyzing the writing position to obtain a third identity identification code and the offset of the fragment data to be read in a target entity file corresponding to the third identity identification code;
determining a file path of the target entity file from the database according to the third identity identification code;
determining the storage position of the fragment data to be read in the target disk according to the file path and the offset;
reading the fragment data to be read from the storage position;
when a storage instruction is received, selecting a disk corresponding to each fragment data from all the disks as a first disk; judging whether the storage space of the current entity file in the first disk is fully written; when the storage space is determined to be full, creating a new entity file in the first disk to obtain first information; storing the first information into a database corresponding to the first disk, wherein the first information at least comprises the corresponding relation between the identification code of the new entity file and the file path of the new entity file.
2. The fragmentation data reading method of claim 1, wherein the method further comprises:
when the storage space is determined not to be fully written, writing the fragment data into the storage space to obtain a writing position of the fragment data;
acquiring an identity identification code of the fragment data;
and storing the corresponding relation between the identification code of the fragment data and the writing position into the database.
3. The fragmentation data reading method of claim 1, wherein the information in the database comprises a combination of one or more of:
the corresponding relation between the identity identification code of the entity file and the file path, and the corresponding relation between the identity identification code of the fragment data and the writing position of the fragment data.
4. The fragmentation data reading method of claim 1, wherein the writing position of the fragmentation data to be read comprises:
and the third identity identification code of the target entity file and the offset of the fragment data to be read in the target entity file.
5. The fragmented data reading method of claim 1, wherein a plurality of entity files are stored in the target disk.
6. The fragmentation data reading method of claim 1, wherein after reading the fragmentation data to be read from the storage location, the method further comprises:
encrypting the fragment data to be read to obtain a target ciphertext;
and responding to the read request by the target ciphertext.
7. An electronic device, the electronic device comprising:
a memory storing at least one instruction; a kind of electronic device with high-pressure air-conditioning system
A processor executing instructions stored in the memory to implement the fragmentation data reading method according to any of claims 1 to 6.
8. The electronic device of claim 7, wherein the electronic device is a node comprising a content distribution network or a blockchain network.
9. A shard data reading system, said system comprising:
the device comprises an extraction unit, a reading unit and a processing unit, wherein the extraction unit is used for extracting a first identity identification code and a second identity identification code from a read request when the read request is received;
the determining unit is used for determining a target disk according to the first identity identification code;
the extracting unit is further configured to extract a writing position of fragment data to be read from a database corresponding to the target disk according to the second identification code;
The analysis unit is used for analyzing the writing position to obtain a third identity identification code and the offset of the fragment data to be read in the target entity file corresponding to the third identity identification code;
the determining unit is further configured to determine a file path of the target entity file from the database according to the third identity code;
the determining unit is further configured to determine a storage position of the fragment data to be read in the target disk according to the file path and the offset;
a reading unit for reading the fragment data to be read from the storage location;
the selecting unit is used for selecting a disk corresponding to each fragment data from all the disks as a first disk when a storage instruction is received;
the judging unit is used for judging whether the storage space of the current entity file in the first disk is full;
the creating unit is used for creating a new entity file in the first disk to obtain first information when the storage space is determined to be full;
the storage unit is used for storing the first information into a database corresponding to the first disk, wherein the first information at least comprises the corresponding relation between the identification code of the new entity file and the file path of the new entity file.
10. A computer-readable storage medium, having stored thereon a fragment data reading program executable by one or more processors to implement the fragment data reading method of any one of claims 1 to 6.
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