Patent ID: 8396833
Filing Date: 2013-03-12
Classification: G06F

Abstract:
1. A method for maintaining, in a computer system, data consistency of file system using a first consistency snapshot and a second consistency snapshot, the method comprising: detecting a first group of file transactions; modifying a first i-map in the first consistency snapshot, the modifying the first i-map based on a first sub-group of file transactions of the first group; commencing operations for recording the first consistency snapshot to a persistent storage; for a second sub-group of file transactions of the first group that appear after the commencing operations for recording the first consistency snapshot, performing the following, detecting, after the generating the second consistency snapshot, a second group of file transactions; and modifying, while the operations for recording the first consistency snapshot are occurring, the second i-map of the second consistency snapshot based on the second group of file transactions.