A cache system based on non-volatile memory and software raid
A non-volatile, caching system technology, applied in the direction of instrumentation, data processing input/output process, input/output to record carrier, etc., can solve problems such as unrecoverable, data loss, and unobvious advantages, so as to avoid multiple access, achieve power-off recovery, and shorten the reading and writing time
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[0023] In order to make the object, technical solution and advantages of the present invention more clearly, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.
[0024] The purpose of the present invention is aimed at the deficiencies in the storage performance and easy loss of power-off data of the current disk array system based on software RAID, and proposes a cache system based on non-volatile memory (Persistent Memory, PMEM for short) and software RAID. The invention is based on the Device Mapper mechanism of Linux, develops the kernel driver module Buaacache, and adopts the PMEM device Apache Pass developed by Intel as the high-speed cache of low-speed RAID. The software RAID is created through the "-C" or "-create" parameter of the mdadm software under the Linux4.4 kernel, and is managed by mdadm.
[0025] The level of the present invention in the Linux I / O system is as figure 1 shown....
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