Data storage method, device and equipment of full flash memory array and readable storage medium

Abstract

The invention discloses a data storage method of a full flash memory array. The data storage method comprises the following steps: detecting whether the amount of data cached in a performance layer ofthe full flash memory array is greater than a predetermined threshold value or not; if yes, writing the cache data in the performance layer back to the capacity layer in batches in a data reduction mode, and generating metadata logs of batch operation; and putting the metadata log into the capacity layer. Thus, in order to avoid frequent IO (Input / Output) operation caused by applying the data capacity reduction method to SSD (Solid State Disk) cache, in the scheme, a batch operation mode is adopted to reduce frequent IO operations, and the batch operation not only comprises batch processing of cache data through a data reduction mode and writing back of the cache data to a capacity layer, but also comprises recording of the generated metadata into metadata logs, and batch disk falling tothe capacity layer, so that SSD cache performance is improved. The invention further discloses a data storage device and equipment of the full flash memory array and a computer readable storage medium, and the technical effects can also be achieved.

Description

Technical field [0001] The present invention relates to the field of data storage technology, and more specifically, to a data storage method, device, equipment and computer-readable storage medium of an all-flash array. Background technique [0002] At present, all-flash arrays are widely used for the cache of mechanical hard disks. This is mainly because flash solid state disks have good random IO performance, while traditional mechanical hard disks do not perform well in supporting random IO performance. Specifically, the all-flash memory The array mainly uses flash solid state drives (Solid State Drives, SSD) as the storage medium. The physical architecture of the all-flash array is divided into the capacity layer sata SSD and the performance layer pcie SSD. The performance layer here is also called write cache, which is mainly due to SSD reading As a result of the asymmetric write performance, the read speed is much higher than the write speed, and the performance layer pcie...

AI Technical Summary

Problems solved by technology

The data reduction method may include data deduplication technology and compression technology. However, when the data deduplication and compression technology is applied to the SSD cache in real time, frequent IO operations will be caused, thereby affecting the performance of the SSD cache.

Images