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Posted to oak-issues@jackrabbit.apache.org by "Davide Giannella (JIRA)" <ji...@apache.org> on 2016/11/14 11:36:02 UTC

[jira] [Closed] (OAK-4881) Make merge semaphore in SegmentNodeStore fair by default

     [ https://issues.apache.org/jira/browse/OAK-4881?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Davide Giannella closed OAK-4881.
---------------------------------

Bulk close for 1.5.13

> Make merge semaphore in SegmentNodeStore fair by default
> --------------------------------------------------------
>
>                 Key: OAK-4881
>                 URL: https://issues.apache.org/jira/browse/OAK-4881
>             Project: Jackrabbit Oak
>          Issue Type: Improvement
>          Components: segment-tar, segmentmk
>            Reporter: Chetan Mehrotra
>            Assignee: Chetan Mehrotra
>              Labels: candidate_oak_1_0, candidate_oak_1_2, candidate_oak_1_4
>             Fix For: 1.6, 1.5.13
>
>         Attachments: OAK-4881-v1.patch
>
>
> Currently the merge semaphore in SegmentNodeStore is by default non fair. OAK-3588 provided a config option to make it fair.
> We should change the default to fair so as to ensure writer threads never get starved. 
> Eventually this change would need to be backported to branches. Further going forward OAK-4122 would replace the lock



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