A system architecture for realizing selective upgrade of storage system ssd cache data

Abstract

The invention discloses a system framework for realizing the selective upgrade of SSD cache data in a storage system. The system framework adopts a data selective upgrade algorithm to store the first hit data block in a queue named a candidate upgrade queue, and uses tracking every When the hit count of hit blocks in a candidate upgrade queue reaches the upgrade limit, the hit data blocks will be cached from the HDD hard disk to the SSD cache, so as to achieve the goal of delaying cache data, reducing write operations, and prolonging the life of SSD; Adopting the system architecture of the present invention can ensure the selective upgrade of SSD cache data, efficiently cache data, and satisfy users' requirements for high-performance storage systems.

Description

technical field [0001] The present invention relates to a system architecture for realizing selective upgrade of data in SSD cache of a storage system, which is usually used in storage systems and aims to provide a system architecture for selective upgrade of SSD cache data. technical background [0002] With the progress of today's society, more and more data information needs to be processed, and the amount of data is growing explosively. This brings many problems to the traditional storage system. Traditional storage systems generally use mechanical hard disks (HDDs), and the performance of traditional storage systems has become a bottleneck. In the past two years, SSD, that is, solid-state storage hard disk, has begun to rise. On the one hand, SSD itself has the characteristics of fast random access, low power consumption, ultra-light and ultra-thin, and low failure rate (non-mechanical components). On the other hand, due to technological development, SSD has graduall...

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Problems solved by technology

[0003] However, because the price of SSD is much higher than that of HDD, using SSD as a cache can meet the performance requirements of today's data processing without increasing the cost of the storage system.

[0004] SSD has some characteristics. One is that SSD has a life limit, and SSD has a problem of erasing and writing times. Every write operation will cause SSD to perform an erasing and writing. Therefore, the number of writing operations will directly affect the number of erasing and writing, thus affecting the life of SSD. ; Second, the capacity of SSD is far smaller than that of HDD, so SSD space is extremely precious

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