An Efficient Approach to Move Elements in a Distributed Geo-Replicated Tree

Anjana, Parwat Singh and Chandrassery, Adithya Rajesh and Peri, Sathya (2022) An Efficient Approach to Move Elements in a Distributed Geo-Replicated Tree. In: 22nd IEEE/ACM International Symposium on Cluster, Cloud and Internet Computing, CCGrid 2022, 16 May 2022 through 19 May 2022, Taormina.

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Abstract

Replicated tree data structures are extensively used in collaborative applications and distributed file systems, where clients often perform move operations. Local move operations at different replicas may be safe. However, remote move operations may not be safe. We present an efficient algorithm to perform move operations on the distributed replicated tree while ensuring eventual consistency. The proposed technique is primarily concerned with resolving conflicts efficiently, requires no interaction between replicas, and works well with network partitions. We use the last write win semantics for conflict resolution based on globally unique operation timestamps. The proposed solution requires only one compensation operation to avoid cycles being formed when move operations are applied. The proposed approach achieves an effective speedup of 14.6-68.19× over the state-of-the-art approach in a geo-replicated setting. © 2022 IEEE.

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