You are viewing a plain text version of this content. The canonical link for it is here.

Posted to hdfs-dev@hadoop.apache.org by "Ankush Bhatiya (JIRA)" <ji...@apache.org> on 2013/03/24 15:45:16 UTC

[jira] [Reopened] (HDFS-4630) Datanode is going OOM due to small files in hdfs

     [ https://issues.apache.org/jira/browse/HDFS-4630?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Ankush Bhatiya reopened HDFS-4630:
----------------------------------


this is not question, Its an issue Datanode going OOM due to incapability of holding all the pointers to all the blocks.
                
> Datanode is going OOM due to small files in hdfs
> ------------------------------------------------
>
>                 Key: HDFS-4630
>                 URL: https://issues.apache.org/jira/browse/HDFS-4630
>             Project: Hadoop HDFS
>          Issue Type: Bug
>          Components: datanode, namenode
>    Affects Versions: 2.0.0-alpha
>         Environment: Ubuntu, Java 1.6
>            Reporter: Ankush Bhatiya
>            Priority: Blocker
>
> Hi, 
> We have very small files(size ranging 10KB-1MB) in our hdfs and no of files are in tens of millions. Due to this namenode and datanode both going out of memory very frequently. When we analyse the head dump of datanode most of the memory was used by ReplicaMap. 
> Can we use EhCache or other to not to store all the data in memory? 
> Thanks
> Ankush

--
This message is automatically generated by JIRA.
If you think it was sent incorrectly, please contact your JIRA administrators
For more information on JIRA, see: http://www.atlassian.com/software/jira