Efficient Synchronization of State-based CRDTs

• Type: Article in International Conference Proceedings Book
• Date: 2019

Authors

Enes, V (Author) Other; Almeida, PS (Author) Other; Baquero, C (Author) Other; Leitao, J (Author) Other

Conference proceedings International

Title: Proceedings - International Conference on Data Engineering

Pages: 148-159

35th IEEE International Conference on Data Engineering, ICDE 2019

8 April 2019 through 11 April 2019

Indexing

ISI Web of Knowledge - 14 Citations

Scopus - 22 Citations

Other information

Authenticus ID: P-00N-V56

DOI: 10.1109/icde.2019.00022

Abstract (EN): To ensure high availability in large scale distributed systems, Conflict-free Replicated Data Types (CRDTs) relax consistency by allowing immediate query and update operations at the local replica, with no need for remote synchronization. State-based CRDTs synchronize replicas by periodically sending their full state to other replicas, which can become extremely costly as the CRDT state grows. Delta-based CRDTs address this problem by producing small incremental states (deltas) to be used in synchronization instead of the full state. However, current synchronization algorithms for delta-based CRDTs induce redundant wasteful delta propagation, performing worse than expected, and surprisingly, no better than state-based. In this paper we: 1) identify two sources of inefficiency in current synchronization algorithms for delta-based CRDTs; 2) bring the concept of join decomposition to state-based CRDTs; 3) exploit join decompositions to obtain optimal deltas and 4) improve the efficiency of synchronization algorithms; and finally, 5) experimentally evaluate the improved algorithms.

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 12