Abstract: A technique for synchronizing instances of sets of information stored on different devices may involve comparison of update digests of the different instances and comparisons of version data of information within the different instances of the sets to determine what information may need to be updated and in which of the instances.

Abstract: A method of synchronising at least first and second instances of an information set comprising a plurality of entries, wherein said first and second instances are located on different nodes of a system, the method comprising: attaching a node value and current logical clock value pair to each entry in the information set of a given instance when said entry in the given instance is changed; generating a digest for each of the at least first and second instances of the information set, wherein said digests comprise logical clock information of a last synchronisation event of one of the at least first and second instances with another of the at least first and second instances of the information set; and synchronising the at least first and second instances of the information set by comparing the digests and reconciling the at least first and second instances.