Hybrid caching cooperative adaptive prefetching method, middleware and system

Abstract

The invention discloses a hybrid caching cooperative adaptive prefetching method, a middleware and a system. The method comprises the following steps of: judging arrival of a prefetching data request by a cooperative adaptive prefetching (CAP) middleware; judging whether a dynamic random access memory (DRAM) jitters; if not, storing the prefetching data request in the DRAM; if so, storing the prefetching data request in a solid state drive (SSD). According to the invention, the DRAM and the SSD are combined into two layers of hybrid caching, a cooperative adaptive prefetching mechanism is used, the storage of the prefetching data request is regulated by the CAP middleware, the prefetching behaviors in the DRAM and the SSD are dynamically regulated, the overall throughput of the system is improved, the frequency of writing to the SSD is reduced, and thus the service life of the SSD is prolonged.

Description

technical field [0001] The invention relates to the technical field of computer data storage, in particular to a hybrid cache cooperative self-adaptive prefetching method, middleware and system. Background technique [0002] When storing computer data, because Flash itself has the problem of read-write asymmetry, especially the performance of random write speed is not satisfactory, using a Flash-based SSD to cache and prefetch a large number of sequential data streams may cause a large amount of traffic on the SSD. Write operations, even serious interleaved random read and write situations, in the worst case not only fail to save energy, but also cause a decline in system performance, resulting in a reduction in the life of the SSD. Contents of the invention [0003] The main purpose of the present invention is to provide a collaborative self-adaptive prefetching method, middleware and system of a hybrid cache that reduces the number of SSD writes and prolongs the service ...

AI Technical Summary

Problems solved by technology

[0002] When storing computer data, because Flash itself has the problem of read-write asymmetry, especially the performance of random write speed is not satisfactory, using a Flash-based SSD to cache and prefetch a large number of sequential data streams may cause a large amount of traffic on the SSD. Write operations, even serious interleaved random read and write situations, in the worst case not only fail to save energy, but also cause system performance to decline, resulting in reduced SSD life

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