System and method for cache management

摘要

A method, computer program product, and computing system for associating a tracking file with a multi-portion data file located on a data array. The tracking file is configured to monitor the status of each portion of the multi-portion data file. At least one portion of the multi-portion data file is modified via a virtual machine executed on a first physical machine. The tracking file is updated to reflect the modification of the at least one portion of the multi-portion data file.

主权项

1. A computer-implemented method comprising:
associating a tracking file with a multi-portion data file, wherein the multi-portion data file is a single data file with multiple portions located on a data array, wherein the tracking file is configured to monitor the status of each portion of the multi-portion data file; modifying at least one portion of the multi-portion data file via a first virtual machine executed on a first physical machine of a plurality of physical machines; updating the tracking file to reflect the modification of the at least one portion of the multi-portion data file, wherein the tracking file includes which physical machine of the plurality of physical machines modified each portion of the multi-portion data file, and further includes an indication whether cache data associated with the first virtual machine was modified while the first virtual machine was migrated and executed on a second physical machine of the plurality of physical machines; migrating the first virtual machine from the first physical machine to the second physical machine, and migrating the first virtual machine from the second physical machine back to the first physical machine; and determining if at least one portion of the multi-portion data file is valid for the first physical machine, wherein the at least one portion of the multi-portion data file is valid for the first physical machine if the at least one portion of the multi-portion data file was not modified by a host other than the first physical machine indicated by the tracking file.