Axel Hanikel created OAK-7849:
---------------------------------
Summary: CommitHook for recording write operations to the segment
store
Key: OAK-7849
URL: https://issues.apache.org/jira/browse/OAK-7849
Project: Jackrabbit Oak
Issue Type: New Feature
Components: segment-tar
Affects Versions: 1.9.9
Reporter: Axel Hanikel
In order to increase reproducibility of tests which measure things like the
duration of operations or their latency, the idea is to record a log of the
changes committed to the segment store, which could later be replayed. That
replay is expected to produce the same results when run on the same machine
under the same conditions. That way, different versions of the segment store
can be compared more easily.
The log could look like this:
{noformat}
1537963348079 FelixStartLevel n+ :clusterConfig
1537963348079 FelixStartLevel p+ :clusterId <STRING> =
bf462164-be56-4023-94ef-f8bafc3eb49f
1537963348079 FelixStartLevel n!
1537963348079 FelixStartLevel n!
1537963350142 Apache+Sling+Repository+Startup+Thread p+ jcr:primaryType <NAME>
= rep:root
1537963350142 Apache+Sling+Repository+Startup+Thread n+ oak:index
1537963350142 Apache+Sling+Repository+Startup+Thread p+ jcr:primaryType <NAME>
= nt:unstructured
1537963350142 Apache+Sling+Repository+Startup+Thread n+ socialLucene
1537963350142 Apache+Sling+Repository+Startup+Thread p+ jcr:primaryType <NAME>
= oak:QueryIndexDefinition
1537963350142 Apache+Sling+Repository+Startup+Thread p+ compatVersion <LONG> = 2
1537963350142 Apache+Sling+Repository+Startup+Thread p+ name <STRING> =
socialLucene
1537963350142 Apache+Sling+Repository+Startup+Thread p+ type <STRING> = lucene
1537963350142 Apache+Sling+Repository+Startup+Thread p+ async <STRINGS> =
[async,nrt]
1537963350142 Apache+Sling+Repository+Startup+Thread p+
evaluatePathRestrictions <BOOLEAN> = true
1537963350142 Apache+Sling+Repository+Startup+Thread p+ reindex <BOOLEAN> = true
1537963350143 Apache+Sling+Repository+Startup+Thread n+ indexRules
1537963350143 Apache+Sling+Repository+Startup+Thread p+ jcr:primaryType <NAME>
= nt:unstructured
1537963350143 Apache+Sling+Repository+Startup+Thread p+ :childOrder <NAMES> =
[social:asiResource]
1537963350143 Apache+Sling+Repository+Startup+Thread n+ social:asiResource
1537963350143 Apache+Sling+Repository+Startup+Thread p+ jcr:primaryType <NAME>
= nt:unstructured
1537963350143 Apache+Sling+Repository+Startup+Thread p+ :childOrder <NAMES> =
[properties]{noformat}
where each line consists of a time stamp, the thread name, the operation (+ =
added, - = removed, ^ = changed, ! = up to parent, n = node, p = property), the
name (urlencoded except for : and / (for readability)), the type between angle
brackets, and a value (urlencoded as well, and a comma-separated list between
square brackets in case of multiple values). An 'n!' at the root node level
ends a commit.
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