Francesco Mari created OAK-7312:
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Summary: Evaluate the feasibility of running cleanup before
compaction
Key: OAK-7312
URL: https://issues.apache.org/jira/browse/OAK-7312
Project: Jackrabbit Oak
Issue Type: Improvement
Components: segment-tar
Reporter: Francesco Mari
Assignee: Francesco Mari
Fix For: 1.10
Currently cleanup is run only after the compaction phase. Assuming that the
system is configured to retain the default value of two generations, it might
happen that, during the compaction phase, the system will need space for a
third generation, the one being currently compacted.
In order to provide better guarantees on the amount of used disk space, it
should be possible to optimistically perform cleanup before compaction, getting
rid of the oldest generation before a new one is constructed.
This issue tracks the feasibility of this approach, to be validated with a
simple proof of concept.
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