You can have your node (tasktracker) running more than 1 task simultaneously. You may set "mapred.tasktracker.map.tasks.maximum" and "mapred.tasktracker.reduce.tasks.maximum" properties found in hadoop-site.xml file. You should change hadoop-site.xml file on all your slave nodes depending on how many cores each slave has. For example, you don't really want to have 8 tasks running at once on a 2 core machine.
/Taeho On Wed, Oct 8, 2008 at 5:53 AM, Elia Mazzawi <[EMAIL PROTECTED]>wrote: > hello, > > I have some dual core nodes, and I've noticed hadoop is only running 1 > instance, and so is only using 1 on the CPU's on each node. > is there a configuration to tell it to run more than once? > or do i need to turn each machine into 2 nodes? > > Thanks. >
