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rocksdb/unreleased_history/new_features/mutable_table_options.md
Peter Dillinger 351d2fd2b6 Make simple BlockBasedTableOptions mutable (#10021) 
Summary:
In theory, there should be no danger in mutability, as table
builders and readers work from copies of BlockBasedTableOptions.
However, there is currently an unresolved read-write race that
affecting SetOptions on BBTO fields. This should be generally
acceptable for non-pointer options of 64 bits or less, but a fix
is needed to make it mutability general here. See
https://github.com/facebook/rocksdb/issues/10079

This change systematically sets all of those "simple" options (and future
such options) as mutable. (Resurrecting this PR perhaps preferable to
proposed https://github.com/facebook/rocksdb/issues/13063)

Pull Request resolved: https://github.com/facebook/rocksdb/pull/10021

Test Plan: Some unit test updates. XXX comment added to stress test code

Reviewed By: cbi42

Differential Revision: D64360967

Pulled By: pdillinger

fbshipit-source-id: ff220fa778331852fe331b42b76ac4adfcd2d760
2024-10-14 17:49:26 -07:00

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  • All "simple" options in BlockBasedTableOptions are now mutable with DB::SetOptions(). For now, "simple" only includes non-pointer options that are 64 bits or less.