Dynamic clients, dynamic partitions, locking, and migration capability for distributed server for real-time collaboration

Abstract

A method for building a locking, migration, dynamic clients, and dynamic partitions capable distributed server for a real-time collaboration session supports the synchronous creation and deletion of partitions by clients as well as the addition and withdrawal of clients during a current collaboration session. The method is based on history servers for providing a history of modifications so that a newly-added client can compute the current state of a shared workspace. The history servers cache and granularize intermediate modification sequences so that computation space and time are reduced. The method supports migrating partition server(s), history server(s), a creation/deletion server, and a collaboration server to different machines. Partition(s) can be dynamically locked and unlocked and, in an extension of this procedure, creation and deletion of partition(s) can be pre-announced and supported. Advanced dynamic-partitioning activities like splitting a partition, merging partitions, shifting data from partition to partition are carried out naturally by locking the concerned partitions during the process of execution.

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