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A file access method, device, equipment and readable storage medium
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A file access and access method technology, applied in electrical components, transmission systems, etc., can solve problems such as affecting user experience, affecting system performance, and deadlocking
Active Publication Date: 2021-08-10
ZHENGZHOU YUNHAI INFORMATION TECH CO LTD
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Problems solved by technology
However, when using cluster locks to solve the problem of resource competition, if a thread (client) holds a lock (that is, it has obtained a lock authorization), when it applies for another lock without authorization and is suspended, a If the dependent path loops back to the initiating node, a closed loop is formed, that is, a deadlock is formed
In a distributed cluster, deadlock is a very fatal problem that will affect system performance
For example, when a process is locked to read and write a file, after a deadlock is formed, other processes cannot access the file, which greatly affects the user experience
Method used
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Embodiment 1
[0050] Please refer to figure 1 , figure 1 It is a flowchart of a file access method in an embodiment of the present invention, which can be used in a distributed storage system, and the method includes the following steps:
[0051] S101. Receive an access request from a target client to access a target file.
[0052] Wherein, the access request includes an access method for requesting access to the target file.
[0053]Under the operation of the user or driven by the internal program, the target client sends an access request to the server to access the target file. Wherein, the target client is any client. The access request may include a method of accessing the target file, and the access method includes at least one of common access methods such as read, cache read, write, cache write, delete, copy, and move. In addition, the target file refers to any file stored in the distributed system such as pictures, documents, tables, audio, and video that can be accessed by the...
Embodiment 2
[0069] Please refer to figure 2 , figure 2 It is a flowchart of another file access method in the embodiment of the present invention, which can be used in a distributed storage system. The method includes the following steps:
[0070] S201. Receive an access request from a target client to access a target file.
[0071] S202. Determine the current status of the metadata lock of the target file by using the access mode and access amount in the access information.
[0072] Wherein, the state of the metadata lock includes an idle state, an exclusive state and a shared state.
[0073] Corresponding relationship between the corresponding access mode and corresponding access amount and the state of the metadata lock can be pre-specified, and the current state of the metadata lock can be directly determined when the access information is obtained.
[0074] Specifically, the current state of the metadata lock of the target file is determined by using the access mode and the amou...
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Abstract
The invention discloses a file access method, which comprises the following steps: receiving an access request from a target client to access a target file; wherein, the access request includes an access mode for requesting access to the target file; obtaining access information corresponding to the target file, and Use the access information to determine the current state of the metadata lock of the target file; use the current state and according to the corresponding relationship between each state of the metadata lock and the access method, determine whether to grant the corresponding access permission to the target client; if yes, allow the target client Client access object files. Through authority management, the problem of resource competition is avoided in advance, data consistency is guaranteed, and system stability is improved. The invention also discloses a file access device, equipment and a readable storage medium, which have corresponding technical effects.
Description
technical field [0001] The present invention relates to the field of computer application technology, in particular to a file access method, device, equipment and readable storage medium. Background technique [0002] A distributed cluster is a computing resource with high performance, high availability, and scalability. However, when multiple users access the same file at the same time, resource contention problems arise. That is, when multiple processes compete for the same shared resource, this situation often causes the system to crash or read wrong data, write wrong data, destroy data consistency, and affect system performance. [0003] Existing methods usually use cluster locks to solve resource competition problems. However, when using cluster locks to solve the problem of resource competition, if a thread (client) holds a lock (that is, it has obtained a lock authorization), when it applies for another lock without authorization and is suspended, a If the dependen...
Claims
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Application Information
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