Data storage method, device and system

Abstract

The embodiment of the invention discloses a data storage method. The data storage method comprises the steps that when a write command is detected, a first command frame used for acquiring available memory information is generated, the generated first command frame is forwarded to a storage controller, a host receives available memory information which is returned due to the fact that the storage controller responds to the first command frame, the available memory information comprises the address identification of a JBOD disk cluster and the address identification of an available memory, a data frame which comprises data to be written is constructed and sent, the address identification, carried by the data frame, of the available memory is used as the address identification of an available memory to be written, and a target address of the data frame is the address of an JBOD. According to the data storage method, the requirement for cache is low, the storage cost is saved, meanwhile, the host directly sends the data frame which comprises the data to be written to the memory to be written, and the efficiency of data storage is improved.

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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