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Posted to oak-issues@jackrabbit.apache.org by "Marcel Reutegger (JIRA)" <ji...@apache.org> on 2016/07/07 10:48:11 UTC
[jira] [Assigned] (OAK-4528) diff calculation in DocumentNodeStore
should try to re-use journal info on diff cache miss
[ https://issues.apache.org/jira/browse/OAK-4528?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Marcel Reutegger reassigned OAK-4528:
-------------------------------------
Assignee: Marcel Reutegger
> diff calculation in DocumentNodeStore should try to re-use journal info on diff cache miss
> ------------------------------------------------------------------------------------------
>
> Key: OAK-4528
> URL: https://issues.apache.org/jira/browse/OAK-4528
> Project: Jackrabbit Oak
> Issue Type: Improvement
> Components: documentmk
> Reporter: Vikas Saurabh
> Assignee: Marcel Reutegger
> Priority: Minor
> Fix For: 1.6
>
>
> Currently, diff information is filled into caches actively (local commits pushed in local_diff, externally read changes pushed into memory_diff). At the time of event processing though, the entries could have already been evicted.
> In that case, we fall back to computing diff by comparing 2 node-states which becomes more and more expensive (and eventually fairly non-recoverable leading to OAK-2683).
> To improve the situation somewhat, we can probably try to consult journal entries to read a smaller-superset of changed paths before falling down to comparison.
> /cc [~mreutegg], [~chetanm], [~egli]
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