APPROACH TO IMPROVE DECOMPRESSION PERFORMANCE BY SCATTER GATHER COMPRESSION UNITS AND ALSO UPDATING CHECKSUM MECHANISM

摘要

A method, apparatus, and system for decompressing data with a hardware compression/decompression accelerator is disclosed. The operations comprise: submitting compressed data from a plurality of stored compression units in a compression region to a hardware compression/decompression accelerator in a single submission for decompression, wherein each compression unit stores a checksum calculated based on corresponding uncompressed data; decompressing, at the hardware compression/decompression accelerator, the compressed data from the plurality of stored compression units, the decompressing generating combined decompressed data corresponding to the compressed data; calculating, at the hardware compression/decompression accelerator, a first combined checksum based on the combined decompressed data; calculating a second combined checksum based on individual checksums stored in the plurality of compression units; determining whether the first combined checksum matches the second combined checksum; and if the combined checksums match, forwarding the combined decompressed data to a storage device for storage as uncompressed data.