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From xiufeng liu <toxiuf...@gmail.com>
Subject question about Hadoop job conf
Date Mon, 17 Jan 2011 14:41:56 GMT
Hi,


The following is the setting of mapred-site where I have set the *
mapred.child.java.opts* to *-Xmx512 -Xincgc*, and *fs.checkpoint.size* to *
268435456*.  But in the runtime setting job.xml, I found that it is still
using the default value *mapred.child.java.opts*= *-Xmx200, and the
*fs.checkpoint.size=67108864,
instead of the values in mapred-site.xml ?  Could anybody advise? Thanks!

-afancy

[xiliu@xiliu-fedora conf]$ cat mapred-site.xml
<?xml version="1.0"?>
<?xml-stylesheet type="text/xsl" href="configuration.xsl"?>

<!-- Put site-specific property overrides in this file. -->

<configuration>
<property>
    <name>mapred.job.tracker</name>
    <value>xiliu-fedora:9001</value>
</property>
<property>
        <name>mapred.local.dir</name>
        <value>/data1/hadoop-0.20.2/mapred/</value>
</property>
<property>
        <name>mapred.tasktracker.map.tasks.maximum</name>
        <value>4</value>
</property>
<property>
        <name>mapred.tasktracker.reduce.tasks.maximum</name>
        <value>4</value>
</property>
<property>
    <name>fs.checkpoint.size</name>
    <value>268435456</value>
</property>
<property>
        <name>mapred.child.java.opts</name>
        <value>-Xmx51 -Xincgc</value>
</property>
</configuration>



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