| 20090313428 | Optimising Remote Mirroring Resynchronisation - The invention relates to data resynchronization on a computer system arranged to store a plurality of primary logical volumes and a plurality of associated secondary logical volumes. The method comprises executing at least one copy thread and at least one resynchronization thread in parallel, the copy thread being arranged to copy one of the secondary logical volumes to an associated tertiary logical volume at a time. The resynchronization thread is arranged to resynchronize the secondary logical volume to an associated primary logical volume, wherein the secondary logical volume is resynchronized after completion of copying the one of the secondary logical volumes. By coordinating the degree of parallelism in resynchronization with the degree in parallelism in executing the copying to a tertiary image, resynchronization is made more efficient. | 12-17-2009 |
