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Posted to common-issues@hadoop.apache.org by "Daryn Sharp (JIRA)" <ji...@apache.org> on 2011/08/16 17:19:28 UTC

[jira] [Updated] (HADOOP-6732) Improve FsShell's heap consumption by switching to listStatus that returns an iterator

     [ https://issues.apache.org/jira/browse/HADOOP-6732?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Daryn Sharp updated HADOOP-6732:
--------------------------------

    Fix Version/s: 0.23.0

> Improve FsShell's heap consumption by switching to listStatus that returns an iterator
> --------------------------------------------------------------------------------------
>
>                 Key: HADOOP-6732
>                 URL: https://issues.apache.org/jira/browse/HADOOP-6732
>             Project: Hadoop Common
>          Issue Type: Improvement
>            Reporter: Hairong Kuang
>            Assignee: Daryn Sharp
>             Fix For: 0.23.0
>
>
> When listing a large directory from the command line using the default heap configuration, FsShell often runs out of memory. This is because all stats of the entries under the directory need to be in memory before printing them. The new API listStatus that returns an iterator of FileStatus, which implemented in HDFS-1091, no longer requires that all entries are fetched first. Thus switching to this new API will greatly improve the use of heap space.

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