Patent ID: 7370163
Filing Date: 2008-05-06
Classification: G06F,H04L

Abstract:
1. A data storage system that is adaptable for one of replicating, mirroring or back-up data, said data storage system comprising; a first data storage device that includes a memory, a persistent storage disk array and a log-structured file system LSF storage disk where data is saved using LSF techniques; wherein the memory is functionally partitioned so as to form discrete memory partitions, a first partition being for buffering data to be stored in the persistent storage disk array and a second partition being for buffering logs to be sequentially written to the LSF storage disk; wherein the first data storage device is configured and arranged so as to parse I/O requests being transmitted thereto such that the data is in the first partition and the logs are in the second partition; and wherein the first data storage device is configured and arranged so as to perform two writes responsive to each write I/O request, one write of the data to the persistent storage disk array and another subsequent write of the logs to the LSF storage disk such that the memory is relatively small.