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From "Ankush Bhatiya (JIRA)" <j...@apache.org>
Subject [jira] [Created] (HDFS-4630) Datanode is going OOM due to small files in hdfs
Date Sun, 24 Mar 2013 11:41:15 GMT
Ankush Bhatiya created HDFS-4630:
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             Summary: 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

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