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From "Chetan Mehrotra (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (OAK-4881) Make merge semaphore in SegmentNodeStore fair
Date Tue, 04 Oct 2016 08:04:21 GMT

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

Chetan Mehrotra updated OAK-4881:
---------------------------------
    Description: 
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

  was:
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


> Make merge semaphore in SegmentNodeStore fair
> ---------------------------------------------
>
>                 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
>             Fix For: 1.6
>
>
> 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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