PCIE SSD array data writing method and system

Abstract

The invention discloses a PCIE SSD array data writing method and system. Data is directly transmitted from an FC module to a shared memory of a PCIE SSD disk controller without passing through the system memory. Therefore, the system memory cannot become the bottleneck restricting the array performance. In addition, as each PCIE SSD disk is provided with a memory, the memory performance of a disk cannot become the bottleneck restricting the array and disk performance so long as the write performance of the memory on each disk is twice of the write bandwidth of the disk per se.

Description

technical field [0001] The invention relates to a data writing method and system of a PCIESSD array. Background technique [0002] The existing operating systems and disk array solutions are designed according to the fact that the performance of mechanical disks is much lower than that of memory. Compared with the read and write delays of mechanical disks, the read and write delays of memory are almost negligible, so regardless of Whether it is a commonly used operating system or the software architecture of the array, the written data is first placed in the system memory and then sent to the disk or returned to the application. Let's take a look at the read and write process of the current architecture in the case of common disk arrays sharing LUNs to hosts through FC, see figure 1 . [0003] figure 1 The method does not consider the write-back situation, the IO data is first written to the array system memory and then returned to the requester. This solution can greatl...

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Problems solved by technology

For example, the theoretical write bandwidth of an array composed of 48 Intel p3700 solid-state drives can r

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