Michael Dürig created OAK-4122:
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Summary: Replace the commit semaphore in the segment node store
with a commit queue
Key: OAK-4122
URL: https://issues.apache.org/jira/browse/OAK-4122
Project: Jackrabbit Oak
Issue Type: Improvement
Components: segmentmk
Reporter: Michael Dürig
Fix For: 1.6
{{SegmentNodeStore}} currently uses a semaphore to coordinate concurrent
commits thus relying on the scheduling algorithm of that implementation and
ultimately of the JVM for in what order commits are processed.
I think it would be beneficial to replace that semaphore with an explicit queue
of pending commit. This would allow us to implement a proper scheduler
optimising for e.g. minimal system load, maximal throughput or minimal latency
etc. A scheduler could e.g. give precedence to big commits and order commits
along the order of its base revisions, which would decrease the amount of work
to be done in rebasing.
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