VMware, Inc.
ENHANCED DATA COMPRESSION IN DISTRIBUTED DATASTORES

Abstract:

A method for performing write operations on a set of one or more physical disks of a set of one or more host machines is provided. The method receives a data block to write on at least one physical disk in the set of physical disks and generates a first set of one or more compressed sectors based on the received data block. The method writes (i) a first entry having a first header and the first set of compressed sectors to a data log that is maintained in a cache, and (ii) the first set of compressed sectors to a bank in memory. The method further determines if a size of data including compressed sectors in the bank satisfies a threshold, and when the size of data in the bank satisfies the threshold, writes the data to the at least one physical disk in the set of physical disks.