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From "Hrishikesh Gadre (JIRA)" <j...@apache.org>
Subject [jira] [Work started] (HDFS-13820) Disable CacheReplicationMonitor If No Cached Paths Exist
Date Sat, 01 Sep 2018 00:32:00 GMT

     [ https://issues.apache.org/jira/browse/HDFS-13820?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Work on HDFS-13820 started by Hrishikesh Gadre.
-----------------------------------------------
> Disable CacheReplicationMonitor If No Cached Paths Exist
> --------------------------------------------------------
>
>                 Key: HDFS-13820
>                 URL: https://issues.apache.org/jira/browse/HDFS-13820
>             Project: Hadoop HDFS
>          Issue Type: Improvement
>          Components: caching
>    Affects Versions: 2.10.0, 3.2.0
>            Reporter: BELUGA BEHR
>            Assignee: Hrishikesh Gadre
>            Priority: Minor
>
> Stating with [HDFS-6106] the loop for checking caching is set to be every 30 seconds.
> Please implement a way to disable the {{CacheReplicationMonitor}} class if there are
no paths specified.  Adding the first cached path to the NameNode should kick off the {{CacheReplicationMonitor}}
and when the last one is deleted, the {{CacheReplicationMonitor}} should be disabled again.
> Alternatively, provide a configuration flag to turn this feature off altogether.



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