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ICDCS
2009
IEEE

A Commutative Replicated Data Type for Cooperative Editing

9 years 9 months ago
A Commutative Replicated Data Type for Cooperative Editing
A Commutative Replicated Data Type (CRDT) is one where all concurrent operations commute. The replicas of a CRDT converge automatically, without complex concurrency control. This paper describes Treedoc, a novel CRDT design for cooperative text editing. An essential property is that the identifiers of Treedoc atoms are selected from a dense space. We discuss practical alternatives for implementing the identifier space based on an extended binary tree. We also discuss storage alternatives for data and meta-data, and mechanisms for compacting the tree. In the best case, Treedoc incurs no overhead with respect to a linear text buffer. We validate the results with traces from existing edit histories.
Nuno M. Preguiça, Joan Manuel Marquè
Added 08 Mar 2010
Updated 08 Mar 2010
Type Conference
Year 2009
Where ICDCS
Authors Nuno M. Preguiça, Joan Manuel Marquès, Marc Shapiro, Mihai Letia
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