Patent ID: 7454402
Filing Date: 2008-11-18
Classification: G06F,Y10S

Abstract:
1. A method for tracing modification documents conveyed among a plurality of servers in order to replicate changes made by users to a shared document, wherein the method facilitates localization of a source of a problem by an administrator, wherein the shared document is shared across the plurality of servers, comprising: creating, at a first one of the servers, a modification document representing only changes made to the shared document by a user of a local computer uniquely associated with the first one of the servers; storing, by the first one of the servers, following completion of the changes, a first time stamp in a field of the modification document; transmitting the modification document, including the first time stamp in the field of the modification document, from the first one of the servers to a second one of the servers; receiving the modification document at the second one of the servers; calculating, by the second one of the servers, a second server receipt time equal to a time at which receipt of the modification document at the second one of the servers is completed; calculating, by the second one of the servers, a first hop delay value equal to a difference between the first time stamp and the second server receipt time; storing, by the second one of the servers, an identity of the first one of the servers together with the first hop delay value into the modification document; overwriting, by the second one of the servers, the first time stamp in the field of the modification document with a second time stamp equal to the second server receipt time; and transmitting, by the second one of the servers, the modification document, including the identity of the first one of the servers, the first hop delay value, and the second time stamp, to a third one of the plurality of servers.