Patent ID: 8176026
Filing Date: 2012-05-08
Classification: G06F

Abstract:
1. A method, in a data processing system, for performing a backend operation in a file system of the data processing system, comprising: initiating, by a processor of the data processing system, the backend operation on a portion of the file system, wherein the backend operation is an error correction operation for correcting an error in the portion of the file system; creating, in a storage device of the data processing system, at least one indirect transition table data structure for performing the backend operation; linking, by the processor, metadata corresponding to the portion of the file system to the at least one indirect transition table data structure; performing, by the processor, the backend operation on data in a sub-portion of the portion of the file system; updating the at least one indirect transition table data structure with pointers to new locations of the data in the sub-portion as transitions of the data, from a state in which the backend operation has not been performed to a state where the backend operation has been performed, are completed; and performing, by the processor, at least one data access operation to the portion of the file system at substantially a same time as performing the backend operation on the data in the sub-portion of the portion of the file system, wherein the at least one data access operation does not target data in the sub-portion of the portion of the file system.