Patent ID: 9740565
Date: 2017-08-22
CPC Classifications: G06F

Claim:
1. A computer-implemented method for maintaining a consistent point of a file system, the method comprising: receiving a request to determine a consistent point of data stored in a file system of a storage system, the storage system having a plurality of storage units including a first storage unit and a second storage unit; in response to the request, retrieving a prime dependency list from a first prime segment stored in the first storage unit, the prime dependency list including information identifying at least a second prime segment stored in the second storage unit, wherein the first and second prime segments are identified by a first prime segment identifier (ID) and a second prime segment ID, respectively, which collectively identify a prime representing a first consistent view of the file system; and determining the consistent point of data based the prime segments listed in the prime dependency list, wherein the consistent point of data represents a file system state that provides a valid view of the data at a point in time of the file system for restoration of the file system back to a prior known state.