but intermediate data is stored in a different directory from dfs/data (something like mapred/local by default i think).
what version are u running? -----Original Message----- From: Ashwinder Ahluwalia on behalf of [EMAIL PROTECTED] Sent: Thu 3/6/2008 10:14 AM To: core-user@hadoop.apache.org Subject: RE: Does Hadoop Honor Reserved Space? I've run into a similar issue in the past. From what I understand, this parameter only controls the HDFS space usage. However, the intermediate data in the map reduce job is stored on the local file system (not HDFS) and is not subject to this configuration. In the past I have used mapred.local.dir.minspacekill and mapred.local.dir.minspacestart to control the amount of space that is allowable for use by this temporary data. Not sure if that is the best approach though, so I'd love to hear what other people have done. In your case, you have a map-red job that will consume too much space (without setting a limit, you didn't have enough disk capacity for the job), so looking at mapred.output.compress and mapred.compress.map.output might be useful to decrease the job's disk requirements. --Ash -----Original Message----- From: Jimmy Wan [mailto:[EMAIL PROTECTED] Sent: Thursday, March 06, 2008 9:56 AM To: core-user@hadoop.apache.org Subject: Does Hadoop Honor Reserved Space? I've got 2 datanodes setup with the following configuration parameter: <property> <name>dfs.datanode.du.reserved</name> <value>429496729600</value> <description>Reserved space in bytes per volume. Always leave this much space free for non dfs use. </description> </property> Both are housed on 800GB volumes, so I thought this would keep about half the volume free for non-HDFS usage. After some long running jobs last night, both disk volumes were completely filled. The bulk of the data was in: ${my.hadoop.tmp.dir}/hadoop-hadoop/dfs/data This is running as the user hadoop. Am I interpretting these parameters incorrectly? I noticed this issue, but it is marked as closed: http://issues.apache.org/jira/browse/HADOOP-2549 -- Jimmy
