Patent ID: 7334004
Filing Date: 2008-02-19
Classification: G06F,Y10S

Abstract:
1. A method comprising: maintaining a LAST-TO-SEE-TIMESTAMP, associated with a session, which indicates a time of a last change made in the session that must be seen by the session; maintaining with a data item version a CLONE-TIME that indicates a time at which a clone branch to which the data item version belongs was cloned from a current version of the data item; determining that the data item version is to be supplied to the session based, at least in part, on a comparison between the CLONE-TIME and the LAST-TO-SEE-TIMESTAMP; supplying the data item version to the session; and setting said CLONE-TIME based on a CLONE-TIME of a non-current data item version when said data item version is cloned from said non-current data item version.