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From Michael Dürig (JIRA) <j...@apache.org>
Subject [jira] [Updated] (OAK-5786) Memory based FileStore bootstrap
Date Mon, 03 Jul 2017 08:55:00 GMT

     [ https://issues.apache.org/jira/browse/OAK-5786?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Michael Dürig updated OAK-5786:
-------------------------------
    Fix Version/s:     (was: 1.7.5)

> Memory based FileStore bootstrap
> --------------------------------
>
>                 Key: OAK-5786
>                 URL: https://issues.apache.org/jira/browse/OAK-5786
>             Project: Jackrabbit Oak
>          Issue Type: New Feature
>          Components: segment-tar
>            Reporter: Alex Deparvu
>            Assignee: Alex Deparvu
>             Fix For: 1.8
>
>
> A memory-based FileStore boot would reduce IO to zero (or as close as possible) and provide
more insight into the code bottlenecks (locks, concurrency control, etc).
> A very basic idea (with minimal changes to current code) is to boot a FileStore that
would
> * disable mmaping
> * have an unbounded segment cache (and/or other caches), with no size checks
> * eagerly load all application state in memory on startup
> * optionally flush everything to disk on shutdown only so the state is persistent



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