Creative Commons Attribution 3.0 Unported license
Quorum systems are useful tools for implementing consistent and available storage in the presence of failures. These systems usually comprise of a static set of servers that provide a fault-tolerant read/write register accessed by a set of clients. We consider a dynamic variant of these systems and propose FreeStore, a set of fault-tolerant protocols that emulates a register in dynamic asynchronous systems in which processes are able to join/leave the set of servers during the execution. These protocols use a new abstraction called view generators, that captures the agreement requirements of reconfiguration and can be implemented in different system models with different properties. Particularly interesting, we present a reconfiguration protocol that is modular, efficient, consensus-free and loosely coupled with read/write protocols. An analysis and an experimental evaluation show that the proposed protocols improve the overall system performance when compared with previous solutions.
@InProceedings{alchieri_et_al:LIPIcs.OPODIS.2017.26,
author = {Alchieri, Eduardo and Bessani, Alysson and Greve, Fab{\'\i}ola and Fraga, Joni da Silva},
title = {{Efficient and Modular Consensus-Free Reconfiguration for Fault-Tolerant Storage}},
booktitle = {21st International Conference on Principles of Distributed Systems (OPODIS 2017)},
pages = {26:1--26:17},
series = {Leibniz International Proceedings in Informatics (LIPIcs)},
ISBN = {978-3-95977-061-3},
ISSN = {1868-8969},
year = {2018},
volume = {95},
editor = {Aspnes, James and Bessani, Alysson and Felber, Pascal and Leit\~{a}o, Jo\~{a}o},
publisher = {Schloss Dagstuhl -- Leibniz-Zentrum f{\"u}r Informatik},
address = {Dagstuhl, Germany},
URL = {https://drops.dagstuhl.de/entities/document/10.4230/LIPIcs.OPODIS.2017.26},
URN = {urn:nbn:de:0030-drops-86411},
doi = {10.4230/LIPIcs.OPODIS.2017.26},
annote = {Keywords: Distributed Systems, Reconfiguration, Fault-Tolerant Quorum Systems}
}