Alex Parvulescu created OAK-5786:
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Summary: Memory based FileStore bootstrap
Key: OAK-5786
URL: https://issues.apache.org/jira/browse/OAK-5786
Project: Jackrabbit Oak
Issue Type: Improvement
Components: segment-tar
Reporter: Alex Parvulescu
Assignee: Alex Parvulescu
A memory-based FileStore boot would reduce IO to zero (or as close as possible)
and provide more insight into the code bottlenecks (locks, concurrency control,
etc).
A very basic idea (with minimal changes to current code) is to boot a FileStore
that would
* disable mmaping
* have an unbounded segment cache (and/or other caches), with no size checks
* eagerly load all application state in memory on startup
* optionally flush everything to disk on shutdown only so the state is
persistent
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