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From "Arpit Agarwal (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (HDFS-10682) Replace FsDatasetImpl object lock with a separate lock object
Date Tue, 02 Aug 2016 00:53:20 GMT

     [ https://issues.apache.org/jira/browse/HDFS-10682?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Arpit Agarwal updated HDFS-10682:
---------------------------------
    Description: 
This Jira proposes to replace the FsDatasetImpl object lock with a separate lock object. Doing
so will make it easier to measure lock statistics like lock held time and warn about potential
lock contention due to slow disk operations.

In the future we can also consider replacing the lock with a read-write lock.

  was:
This Jira proposes to replace the FsDatasetImpl object lock with a separate lock object. Doing
so will allow us to measure lock statistics.

In the future we can also consider replacing the lock with a read-write lock.


> Replace FsDatasetImpl object lock with a separate lock object
> -------------------------------------------------------------
>
>                 Key: HDFS-10682
>                 URL: https://issues.apache.org/jira/browse/HDFS-10682
>             Project: Hadoop HDFS
>          Issue Type: Improvement
>          Components: datanode
>            Reporter: Chen Liang
>            Assignee: Chen Liang
>         Attachments: HDFS-10682.001.patch, HDFS-10682.002.patch, HDFS-10682.003.patch,
HDFS-10682.004.patch, HDFS-10682.005.patch, HDFS-10682.006.patch
>
>
> This Jira proposes to replace the FsDatasetImpl object lock with a separate lock object.
Doing so will make it easier to measure lock statistics like lock held time and warn about
potential lock contention due to slow disk operations.
> In the future we can also consider replacing the lock with a read-write lock.



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