Buffer memory writing method and apparatus and synchronizing method and apparatus for disk cache region

Abstract

The embodiment of the invention provides a buffer memory writing method and apparatus and a synchronizing method and apparatus for a disk cache region. The buffer memory writing method comprises steps of acquiring to-be-written data of a system, determining the size of the to-be-written data, writing the to-be-written data a data region of a disk when the size of the to-be-written data is larger than a first threshold value, and writing the to-be-written into data and corresponding metadata information into a buffer region of a non-volatile memory storer when the size of the to-be-written data is smaller or equal to the first threshold value. The metadata information comprises a disk address of the to-be-written data, data size and version number; and the version number indicates a sequence number of the to-be-written data updated by the system. The to-be-written data is directly written into the data region of the disk, so large handling capacity data can be buffered without the use of the buffer region of the disk and occupancy rate of large handling capacity applications in the buffering region space can be reduced; and pressure of buffering equipment can be reduced.

Description

technical field [0001] The invention relates to computer technology, in particular to a write cache method and device and a disk buffer synchronization method and device. Background technique [0002] At present, many new storage media have better access performance. Using these new storage media as a write cache can increase the write speed, merge small IO operations into large IO operations, and increase the hdd disk (HardDiskDrive) per second The number of small IO operations. [0003] However, due to the high cost of new storage media, when using new storage media as a write cache, the cache capacity is very small. When dealing with high-throughput application environments, the write cache is quickly filled, and the write performance will drop rapidly. . How to improve the write cache to cope with long-term continuous pressure writing is the main problem faced when designing the write cache. [0004] The development and commercialization of nonvolatile random access m...

AI Technical Summary

Problems solved by technology

[0005] In the existing write cache implementation, the cache is placed on a faster storage medium, but the faster the storage medium, the higher the cost and the smaller the capacity

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