Data read-write method of disk array

Abstract

The invention provides a data read-write method of a disk array, comprising the following steps: distributing a plurality of ribbon structures in a memory and establishing a disk ribbon state bitmap to record the state attribute of all disk ribbons; initializing the disk ribbon state bitmap; receiving a read-write request of the user and updating the disk ribbon state bitmap; executing the read-write request of the user, executing a write target data block if the request is a write request, and updating a check block or updating the check block in a delaying mode according to the state attribute of the disk ribbon of the target data block; and executing a read-request processing flow if the request is a read request. The data read-write method uses the disk ribbon state bitmap for checking the written operation frequency in an automatic-adaptation way, and for the disk ribbon with high write-operation frequency, the check block is updated in a delaying mode to accelerate the read-write processing efficiency of the disk array.

Description

technical field [0001] The invention relates to the field of computer storage, in particular to a method for reading and writing data of an independent redundant disk array in the field. Background technique [0002] With the rapid development of information technology, various industry applications have put forward higher requirements for information storage. These requirements mainly include the speed, capacity, reliability, availability and security of storage systems. Traditional storage systems have been Can't be satisfied. [0003] RAID (Redundant Array of Independent Disk, independent redundant disk array) is a storage system composed of multiple independent disks, which can improve read and write performance and have fault tolerance. RAID implements the parallel reading and writing function of multiple disks, and splits user data into multiple data blocks and writes them to multiple disks in parallel. When reading data, data blocks are first read in parallel from m...

AI Technical Summary

Problems solved by technology

[0010] The technology of this Chinese patent has the following deficiencies: first, the update of the verification data that should be performed each time the system performs a write operation is delayed after the timing time, that is, the disk stripes distributed in various positions of the disk may not be updated. Update the check block, the data of the entire stripe is in an inconsistent state

The method provided by the US patent reduces the number of read operations performed by the system when calculating the check block, thus reducing the time for calculating the check block data to a certain extent, but the time for writing the check block is still relatively long, especially in In the case of frequent write operations, the overhead of repeatedly updating the check block is still high

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