Can Namenode and JobTracker run in different server?

[Eason.Lee]

Just want to run NameNode and JobTracker in separate server,for example
run NameNode in server1 and JobTracker in server2

my config is just like this, but It seems jobtracker not start correctly!

   <property>
      <name>fs.default.name</name>
      <value>hdfs://server1:9000/</value>
   </property>
   <property>
      <name>mapred.job.tracker</name>
      <value>server2:9001</value>
   </property>