I was thinking not for M/R, but for the actual daemons:
When I go and start up a daemon (like below). They all use the same
hadoop-env.sh. Which allows you to only set the HADOOP_HEAPSIZE once..
not differently for each daemon-type..
bin/hadoop-daemon.sh start namenode
bin/hadoop-daemon.sh start datanode
bin/hadoop-daemon.sh start secondarynamenode
bin/hadoop-daemon.sh start jobtracker
bin/hadoop-daemon.sh start tasktracker
Amogh Vasekar wrote:
If you need to set the java_options for mem., you can do this via configure in
your MR job.
-----Original Message-----
From: Fernando Padilla [mailto:f...@alum.mit.edu]
Sent: Wednesday, July 22, 2009 9:11 AM
To: common-user@hadoop.apache.org
Subject: best way to set memory
So.. I want to have different memory profiles for
NameNode/DataNode/JobTracker/TaskTracker.
But it looks like I only have one environment variable to modify,
HADOOP_HEAPSIZE, but I might be running more than one on a single
box/deployment/conf directory.
Is there a proper way to set the memory for each kind of server? Or has
an issue been created to document this bug/deficiency??
