Cache craftiness for fast multicore key-value storage
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Morris_Cache craftiness.pdf
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260.5 KB
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Author(s)
Mao, Yandong
Kohler, Eddie
Morris, Robert Tappan
Date Issued
April 2012
Journal
Proceedings of the 7th ACM european conference on Computer Systems (EuroSys '12)
Publisher
Association for Computing Machinery (ACM)
Citation
Yandong Mao, Eddie Kohler, and Robert Tappan Morris. 2012. Cache craftiness for fast multicore key-value storage. In Proceedings of the 7th ACM european conference on Computer Systems (EuroSys '12). ACM, New York, NY, USA, 183-196.
Version
Author's final manuscript
Abstract
We present Masstree, a fast key-value database designed for SMP machines. Masstree keeps all data in memory. Its main data structure is a trie-like concatenation of B+-trees, each of which handles a fixed-length slice of a variable-length key. This structure effectively handles arbitrary-length possiblybinary keys, including keys with long shared prefixes. [superscript +]-tree fanout was chosen to minimize total DRAM delay when descending the tree and prefetching each tree node. Lookups use optimistic concurrency control, a read-copy-update-like technique, and do not write shared data structures; updates lock only affected nodes. Logging and checkpointing provide consistency and durability. Though some of these ideas appear elsewhere, Masstree is the first to combine them. We discuss design variants and their consequences.
On a 16-core machine, with logging enabled and queries arriving over a network, Masstree executes more than six million simple queries per second. This performance is comparable to that of memcached, a non-persistent hash table server, and higher (often much higher) than that of VoltDB, MongoDB, and Redis.
MIT Department
Massachusetts Institute of Technology. Computer Science and Artificial Intelligence Laboratory
Massachusetts Institute of Technology. Department of Electrical Engineering and Computer Science
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Creative Commons Attribution-Noncommercial-Share Alike 3.0
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DOI of Published Version
https://doi.org/10.1145/2168836.2168855
