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From "Ajith S (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HDFS-9011) Support splitting BlockReport of a storage into multiple RPC
Date Wed, 16 Dec 2015 02:12:46 GMT

    [ https://issues.apache.org/jira/browse/HDFS-9011?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15059359#comment-15059359
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Ajith S commented on HDFS-9011:
-------------------------------

would cause this https://issues.apache.org/jira/browse/HDFS-8610

> Support splitting BlockReport of a storage into multiple RPC
> ------------------------------------------------------------
>
>                 Key: HDFS-9011
>                 URL: https://issues.apache.org/jira/browse/HDFS-9011
>             Project: Hadoop HDFS
>          Issue Type: Improvement
>            Reporter: Jing Zhao
>            Assignee: Jing Zhao
>         Attachments: HDFS-9011.000.patch, HDFS-9011.001.patch, HDFS-9011.002.patch
>
>
> Currently if a DataNode has too many blocks (more than 1m by default), it sends multiple
RPC to the NameNode for the block report, each RPC contains report for a single storage. However,
in practice we've seen sometimes even a single storage can contains large amount of blocks
and the report even exceeds the max RPC data length. It may be helpful to support sending
multiple RPC for the block report of a storage. 



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