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From "Andrew Wang (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (HDFS-11023) I/O based throttling of DN replication work
Date Wed, 26 Oct 2016 00:58:58 GMT

     [ https://issues.apache.org/jira/browse/HDFS-11023?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel

Andrew Wang updated HDFS-11023:
    Component/s:     (was: erasure-coding)

> I/O based throttling of DN replication work
> -------------------------------------------
>                 Key: HDFS-11023
>                 URL: https://issues.apache.org/jira/browse/HDFS-11023
>             Project: Hadoop HDFS
>          Issue Type: Improvement
>    Affects Versions: 3.0.0-alpha1
>            Reporter: Andrew Wang
> Datanode recovery work is currently throttled based on the number of blocks to be recovered.
This is fine in a replicated world, since each block is equally expensive to recover. However,
EC blocks are much more expensive to recover, and the amount depends on the EC policy.
> It'd be better to have recovery throttles that accounted for the amount of I/O rather
than just the # of blocks.

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