Method and apparatus for dividing buffer memory space and buffer memory controller thereof

Abstract

The method comprises: counting the flow rate accessing each disk array in a preset time interval; according to the flow rate accessing each disk array in the time interval, resizing the space of each Cache respectively corresponding to each disk array. The apparatus thereof comprises a host computer processor and a buffer controller.

Description

technical field [0001] The invention relates to network storage technology, in particular to a method and device for dividing cache (Cache) space and a cache controller. Background technique [0002] With the rapid development of information technology, network storage control systems that can provide data storage services have emerged. figure 1 It is a structural diagram of the network storage control system. see figure 1 , the network storage control system mainly includes a disk array (the disk array referred to in this article includes a disk that actually stores data and a disk controller that controls the disk), and a host processor that performs read and write operations. In addition, since the operating frequency of the host processor is much higher than that of the disk array, in order to improve the efficiency of data reading and writing, the network storage control system also includes a cache controller whose operating frequency is between the host processor an...

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Problems solved by technology

In this way, it often leads to low access efficiency of the network storage control system

For example, see figure 2 , the read and write data volume of disk array A3 is 100KB, and the cache space of A3 cannot meet the data storage requirements of disk array A3, while the read and write data volume of disk array A2 is as small as 5KB, and there is a large amount of remaining cache space in A2 The free space cannot be used by the disk array A3, which reduces the overall read and write speed of the system and the data hit rate of the disk array, resulting in low access efficiency of the network storage control system and greatly reducing system performance

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