Patent ID: 8626713
Filing Date: 2014-01-07
Classification: G06F

Abstract:
1. A method comprising: initiating committing to storage, into a nonvolatile machine-readable medium, of a current consistency snapshot of a plurality of data objects in a redirect-on-write file system; responsive to initiating committing to storage of the current consistency snapshot, creating a buffer header for a data object of the plurality of data objects, wherein the buffer header comprises a first data pointer to point to a first copy of the data object, and wherein the buffer header comprises a commit-in-progress context and an update-in-progress context, wherein the commit-in progress context and the update-in-progress context are initially assigned a same value; assigning a generation value to the current consistency snapshot that is unique relative to generation values of other consistency snapshots, wherein the first copy of the data object has a generation value equal to the generation value of the current consistency snapshot, wherein a second copy of the data object to have a generation value greater than the generation value of the first copy of the data object; receiving, during the committing to storage of the current consistency snapshot, an update to the data object, the update having a generation value greater than the generation value assigned to the current consistency snapshot; responsive to receiving the update to the data object,