Block equipment write IO shaping and multi-controller synchronization system and method

Abstract

The invention relates to a block equipment write IO shaping and multi-controller synchronization system and method, and belongs to the technical field of mass data storage. According to the system and method, virtual block equipment driving, binding with bottom block equipment, write IO request shaping and synchronization among multi-controller clusters are realized at a controller. The system comprises a block equipment filter drive, an IP shaping module, a read gap module, a cache pool, a forwarding module and an IP downward brushing module. Rear-end physical block equipment is share type equipment and comprises FC equal-mapping shared disks or disks connected through SAS or other manners. Compared with the prior art, the system and method have the advantages that multi-controller data synchronization is solved without occupying double space; the write IO performance optimization and cache consistency problems in multi-controller cluster storage are solved, the bandwidth performance of block equipment is brought into full play, the time waste of repeated track seeking is avoided, and the write jitter and response delay of the bottom disk are reduced; and write cache is returned, so that the write jitter of the disk and the response delay problem of IO are solved.

Description

technical field [0001] The invention relates to a block device write IO shaping and multi-controller synchronization system and synchronization method, which is suitable for a multi-controller cluster storage system and belongs to the technical field of massive data storage. Background technique [0002] In the field of modern storage, in order to improve the reliability of stored data and improve the input and output performance of storage systems, people have designed a variety of data storage solutions, which are usually various types of redundant arrays of independent disks (Redundant Arrays of Independent Disks, RAID). By using specific hardware or software, RAID combines multiple physical storage devices such as disks to form a unified logical storage device. Storage based on dual-controllers is the current mainstream technology, and some manufacturers are currently implementing multi-controller technology, but it is mainly based on dual-controllers, forming a cluster...

AI Technical Summary

Problems solved by technology

Storage based on dual-controllers is the current mainstream technology, and some manufacturers are currently implementing multi-controller technology, but it is mainly based on dual-controllers, forming a cluster between multiple pairs of dual-controllers, which is not fully switched. Write IO synchronization is only in Between each pair of dual controllers, the IO is only synchronized to the cache of the other controller in the dual controller, that is, cache mirroring. The IO between multiple pairs of dual controllers is not optimized and synchronized, and the disk can only Shared access between local dual-controller controllers, data security between multiple controllers needs to be replicated at the volume level, and at the same time occupy the local disk space of each group of dual-controllers, such as figure 1 shown

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