Francesco Mari created OAK-7504:
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Summary: Include dynamic commit information in the persisted
repository data
Key: OAK-7504
URL: https://issues.apache.org/jira/browse/OAK-7504
Project: Jackrabbit Oak
Issue Type: Improvement
Components: segment-tar
Reporter: Francesco Mari
Fix For: 1.10
The data in the Segment Store doesn't provide any information about the dynamic
behaviour of the system. For example, who performed the commit? How many
commits were performed from the same committer?
In order to simplify debugging the dynamic behaviour of a system, it should be
possible to store metadata about the commit in the super-root generated by that
commit. For example, the following information might be attached to the
super-root:
* The name of the thread performing the commit. This solution might prove
expensive in terms of consumed disk space, but would be the most precise tool
to identify the author of a commit.
* A hash of the thread name. If storing thread names proves expensive, a hash
of the thread name can be stored instead. This doesn't allow to exactly
identify the author of the commit, but would allow us to correlated different
commits as performed by the same thread.
* Both the thread name and its hash, with the thread name stored only every Nth
commit. This solution is not as precise as storing the thread name for every
commit but, if there is a frequent committer, its thread name will be more
likely to be sampled, thus providing a precise identity to a thread name hash.
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