Management method of cache of storage area network

Abstract

The invention discloses a management method of a cache of an SAN (Storage Area Network), which is characterized by realizing the access control on the cache data of VSS (Volume Shadow Copy Service) in the SAN. The management method comprises the following steps of: transmitting snapshot data to a cache of a volume shadow copy server by the SAN; adjusting the data writing-in speed of a block device to be less than data writing-in cache speed; detecting the cache capacity and judging whether the data in the cache are written into the block device or not; and repeating the read-write motion of the cache until the establishment of snapshot volumes is accomplished.

Description

technical field [0001] The invention relates to a data access method, in particular to a method for managing cache memory of a Storage Area Network (SAN for short). Background technique [0002] Volume Shadow Copy Service (VSS for short) enables storage infrastructure devices (such as disks and arrays) to create high-fidelity point-in-time images, which are shadow copies. It can create image copies on multiple volumes, or on a single volume, without affecting system performance. VSS achieves the ability to create high-fidelity image copies by coordinating business application software, backup programs, and storage hardware. [0003] The working framework of VSS includes a VSS core module 110, a requester 120 (Requestor), a writer 130 (Writer), and a provider 140 (Provider). Among them, the specific functions of each module are as follows, and please cooperate with figure 1 As shown, it is a schematic diagram of the existing VSS architecture: [0004] The requestor 120 (R...

AI Technical Summary

Problems solved by technology

This approach makes the process of VSS writing to the storage area network not copy-write (copy-write), thus reducing the access efficiency of VSS

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