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EEMARQ: Efficient Lock-Free Range Queries with Memory Reclamation

Authors: Gali Sheffi, Pedro Ramalhete, and Erez Petrank

Published in: LIPIcs, Volume 253, 26th International Conference on Principles of Distributed Systems (OPODIS 2022)


Abstract
Multi-Version Concurrency Control (MVCC) is a common mechanism for achieving linearizable range queries in database systems and concurrent data-structures. The core idea is to keep previous versions of nodes to serve range queries, while still providing atomic reads and updates. Existing concurrent data-structure implementations, that support linearizable range queries, are either slow, use locks, or rely on blocking reclamation schemes. We present EEMARQ, the first scheme that uses MVCC with lock-free memory reclamation to obtain a fully lock-free data-structure supporting linearizable inserts, deletes, contains, and range queries. Evaluation shows that EEMARQ outperforms existing solutions across most workloads, with lower space overhead and while providing full lock freedom.

Cite as

Gali Sheffi, Pedro Ramalhete, and Erez Petrank. EEMARQ: Efficient Lock-Free Range Queries with Memory Reclamation. In 26th International Conference on Principles of Distributed Systems (OPODIS 2022). Leibniz International Proceedings in Informatics (LIPIcs), Volume 253, pp. 5:1-5:22, Schloss Dagstuhl – Leibniz-Zentrum für Informatik (2023)


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@InProceedings{sheffi_et_al:LIPIcs.OPODIS.2022.5,
  author =	{Sheffi, Gali and Ramalhete, Pedro and Petrank, Erez},
  title =	{{EEMARQ: Efficient Lock-Free Range Queries with Memory Reclamation}},
  booktitle =	{26th International Conference on Principles of Distributed Systems (OPODIS 2022)},
  pages =	{5:1--5:22},
  series =	{Leibniz International Proceedings in Informatics (LIPIcs)},
  ISBN =	{978-3-95977-265-5},
  ISSN =	{1868-8969},
  year =	{2023},
  volume =	{253},
  editor =	{Hillel, Eshcar and Palmieri, Roberto and Rivi\`{e}re, Etienne},
  publisher =	{Schloss Dagstuhl -- Leibniz-Zentrum f{\"u}r Informatik},
  address =	{Dagstuhl, Germany},
  URL =		{https://drops-dev.dagstuhl.de/entities/document/10.4230/LIPIcs.OPODIS.2022.5},
  URN =		{urn:nbn:de:0030-drops-176253},
  doi =		{10.4230/LIPIcs.OPODIS.2022.5},
  annote =	{Keywords: safe memory reclamation, lock-freedom, snapshot, concurrency, range query}
}
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