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From "Yang Yun (Jira)" <j...@apache.org>
Subject [jira] [Updated] (HDFS-15655) Add option to make balancer prefer to get cold blocks
Date Wed, 28 Oct 2020 02:08:00 GMT

     [ https://issues.apache.org/jira/browse/HDFS-15655?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Yang Yun updated HDFS-15655:
----------------------------
    Attachment: HDFS-15655.002.patch
        Status: Patch Available  (was: Open)

> Add option to make balancer prefer to get cold blocks
> -----------------------------------------------------
>
>                 Key: HDFS-15655
>                 URL: https://issues.apache.org/jira/browse/HDFS-15655
>             Project: Hadoop HDFS
>          Issue Type: Improvement
>          Components: balancer &amp; mover
>            Reporter: Yang Yun
>            Assignee: Yang Yun
>            Priority: Minor
>         Attachments: HDFS-15655.001.patch, HDFS-15655.002.patch
>
>
> We met two issues when using balancer.
>  # Moving hot files may cause failing of dfsclient reading.
>  # Some blocks of temporary files are moved and they are deleted soon.
> Add a option dfs.namenode.hot.block.interval, the balancer prefer to get the blocks
which are belong to the cold files created before this time period.



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