Paper Info
Title
Efficient Synchronization of State-based CRDTs.
Abstract
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.
Year
DOI
Venue
2018
10.1109/ICDE.2019.00022
2019 IEEE 35th International Conference on Data Engineering (ICDE)
Keywords
Field
DocType
Synchronization,Lattices,Optimization,Redundancy,Distributed databases,Conferences,Data engineering
Replica,Graph,Synchronization,Computer science,Inefficiency,Data type,Synchronization algorithm,Merge (version control),Distributed computing,Data consistency
Journal
Volume
ISSN
Citations 
abs/1803.02750
1084-4627
0
PageRank 
References 
Authors
0.34
17
4
Name
Order
Citations
PageRank
Vitor Enes111.37
Paulo Sérgio Almeida226823.03
Carlos Baquero313214.10
João Leitão415916.95