Resilient Conflict-free Replicated Data Types without Atomic Broadcast

Daniel Brahneborg, Wasif Afzal, Saad Mubeen

2022

Abstract

In a distributed system, applications can perform both reads and updates without costly synchronous network round-trips by using Conflict-free Replicated Data Types (CRDTs). Most CRDTs are based on some variant of atomic broadcast, as that enables them to support causal dependencies between updates of multiple objects. However, the overhead of this atomic broadcast is unnecessary in systems handling only independent CRDT objects. We identified a set of use cases for tracking resource usage where there is a need for a replication mechanism with less complexity and network usage as compared to using atomic broadcast. In this paper, we present the design of such a replication protocol that efficiently leverages the commutativity of CRDTs. The proposed protocol CReDiT (CRDT enhanced with intelligence) uses up to four communication steps per update, but these steps can be batched as needed. It uses network resources only when updates need to be communicated. Furthermore, it is less sensitive to server failures than current state-of-the-art solutions as other nodes can use new values already after the first communication step, instead of after two or more.

Paper Citation

in Harvard Style

Brahneborg D., Afzal W. and Mubeen S. (2022). Resilient Conflict-free Replicated Data Types without Atomic Broadcast. In Proceedings of the 17th International Conference on Software Technologies - Volume 1: ICSOFT, ISBN 978-989-758-588-3, pages 516-523. DOI: 10.5220/0011314500003266

in Bibtex Style

@conference{icsoft22,
author={Daniel Brahneborg and Wasif Afzal and Saad Mubeen},
title={Resilient Conflict-free Replicated Data Types without Atomic Broadcast},
booktitle={Proceedings of the 17th International Conference on Software Technologies - Volume 1: ICSOFT,},
year={2022},
pages={516-523},
publisher={SciTePress},
organization={INSTICC},
doi={10.5220/0011314500003266},
isbn={978-989-758-588-3},
}

in EndNote Style

TY - CONF

JO - Proceedings of the 17th International Conference on Software Technologies - Volume 1: ICSOFT,
TI - Resilient Conflict-free Replicated Data Types without Atomic Broadcast
SN - 978-989-758-588-3
AU - Brahneborg D.
AU - Afzal W.
AU - Mubeen S.
PY - 2022
SP - 516
EP - 523
DO - 10.5220/0011314500003266