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Stratified B-trees and versioning dictionaries

A classic versioned data structure in storage and computer science is the copy-on-write (CoW) B-tree -- it underlies many of today's file systems and databases, including WAFL, ZFS, Btrfs and more. Unfortunately, it doesn't inherit the B-tree's optimality properties; it has poor space utilization, cannot offer fast updates, and relies on random IO to scale. Yet, nothing better has been developed since. We describe the `stratified B-tree', which beats all known semi-external memory versioned B-trees, including the CoW B-tree. In particular, it is the first versioned dictionary to achieve optimal tradeoffs between space, query and update performance.

preprint2011arXivOpen access
Andy TwiggAndrew BydeGrzegorz MilosTim MoretonJohn WilkesTom Wilkie
DatabasesData Structures and Algorithms
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Open access6 authors2 topics
Imported metadata coverageMissing code, dataset, citation and institution fields are tracked without dominating the paper.Details
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Andy TwiggAndrew BydeGrzegorz MilosTim MoretonJohn WilkesTom Wilkie

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