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• W2020129682 abstract "Multi-Version Concurrency Control (MVCC) is a widely employed concurrency control mechanism, as it allows for execution modes where readers never block writers. However, most systems implement only snapshot isolation (SI) instead of full serializability. Adding serializability guarantees to existing SI implementations tends to be prohibitively expensive. We present a novel MVCC implementation for main-memory database systems that has very little overhead compared to serial execution with single-version concurrency control, even when maintaining serializability guarantees. Updating data in-place and storing versions as before-image deltas in undo buffers not only allows us to retain the high scan performance of single-version systems but also forms the basis of our cheap and fine-grained serializability validation mechanism. The novel idea is based on an adaptation of precision locking and verifies that the (extensional) writes of recently committed transactions do not intersect with the (intensional) read predicate space of a committing transaction. We experimentally show that our MVCC model allows very fast processing of transactions with point accesses as well as read-heavy transactions and that there is little need to prefer SI over full serializability any longer." @default.
• W2020129682 created "2016-06-24" @default.
• W2020129682 creator A5023235581 @default.
• W2020129682 creator A5032014132 @default.
• W2020129682 creator A5043735667 @default.
• W2020129682 date "2015-05-27" @default.
• W2020129682 modified "2023-10-15" @default.
• W2020129682 title "Fast Serializable Multi-Version Concurrency Control for Main-Memory Database Systems" @default.
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• W2020129682 doi "https://doi.org/10.1145/2723372.2749436" @default.
• W2020129682 hasPublicationYear "2015" @default.
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