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Date: Sun, 17 Nov 2013 14:11:22 +0000 (UTC)
From: "Vinay (JIRA)" <jira@apache.org>
To: hdfs-issues@hadoop.apache.org
Message-ID: <JIRA.12679327.1384481627477.87522.1384697482253@arcas>
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Subject: [jira] [Commented] (HDFS-5517) Lower the default maximum number of
 blocks per file
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    [ https://issues.apache.org/jira/browse/HDFS-5517?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13824840#comment-13824840 ] 

Vinay commented on HDFS-5517:
-----------------------------

+1 ATM. Thanks for Jira and patch.

> Lower the default maximum number of blocks per file
> ---------------------------------------------------
>
>                 Key: HDFS-5517
>                 URL: https://issues.apache.org/jira/browse/HDFS-5517
>             Project: Hadoop HDFS
>          Issue Type: Bug
>          Components: namenode
>    Affects Versions: 2.2.0
>            Reporter: Aaron T. Myers
>            Assignee: Aaron T. Myers
>         Attachments: HDFS-5517.patch
>
>
> We introduced the maximum number of blocks per file in HDFS-4305, but we set the default to 1MM. In practice this limit is so high as to never be hit, whereas we know that an individual file with 10s of thousands of blocks can cause problems. We should lower the default value, in my opinion to 10k.


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