A data storage method, device and system

Abstract

A data storage method comprises: when a write command is detected, generating a first command frame for acquiring available memory information, and forwarding the generated first command frame to a storage controller; a host receiving the available memory information returned by the storage controller in response to the first command frame, the available memory information comprising an address identifier of Just a Bundle Of Disks (JBOD) and an address identifier of an available memory; constructing and sending a data frame comprising to-be-written data, the data frame carrying the address identifier of the available memory that serves as an address identifier to be written into the available memory, and a destination address of the data frame being the address identifier of the JBOD. The data storage method has a low requirement on a cache, and saves the storage cost; and in addition, a host directly sends a data frame comprising to-be-written data to a to-be-written memory, thereby improving the data storage efficiency.

Description

technical field [0001] The invention relates to the field of data storage, in particular to a data storage method, device and system. Background technique [0002] In the existing data storage method, when the host reads and writes data, the read and write commands and the data to be read and written all need to pass through the storage controller. It is impossible to continue to connect more hosts. If the host continues to be connected, the data storage speed of the storage controller will slow down. [0003] Existing high-end storage uses multiple storage controllers. For example, four-controllers and eight-controllers storage controllers are provided for storage expansion. Each controller includes a Cache (cache) board, and each Cache includes: block elements Data, read, and write cached data, and data synchronization between multiple caches. Therefore, as the number of storage devices attached to the storage controller increases, the capacity of the cache will also incr...

AI Technical Summary

Problems solved by technology

[0002] In the existing data storage method, when the host reads and writes data, the read and write commands and the data to be read and written all need to pass through the storage controller. It is impossible to continue to connect to more hosts. If you continue to connect to hosts, the data storage speed of the storage controller will slow down

[0003] Existing high-end storage uses multiple storage controllers. For example, four-controllers and eight-controllers storage controllers are provided for storage expansion. Each controller includes a Cache (cache) board, and each Cache includes: block elements Data, read, and write cached data, and data synchronization between multiple caches. Therefore, as the number of storage devices attached to the storage controller increases, the capacity of the cache will also increase, which increases the storage cost. The increase in the number of hosts and attached memories requires a large amount of data reading and writing, the data processing speed of the storage controller will also slow down, and the data storage efficiency is low

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