> Hi,
>
> Do we have to run multiple task trackers when running multiple data nodes on
> a single
> computer?
>
> Regards,
>
> Xiaobo Gu
>
> > -----Original Message-----
> > From: Xiaobo Gu [mailto:guxiaobo1...@gmail.com]
> > Sent: Friday, July 01, 2011 11:35 PM
> > To: hdfs-u...@hadoop.apache.org
> > Subject: How to run multiple data nodes and multiple task trackers on
> > single server.
> >
> > Hi:
> > I am following the guides in
> >
> http://hadoop-karma.blogspot.com/2010/05/hadoop-cookbook-4-how-to-run-multiple.html
> > with Hadoop 0.20.203.0 on Solaris 10u9 X64, but I have revised the
> > hadoop-daemon.sh call to
> >
> > hadoop-daemon.sh $1 datanode $DN_CONF_OPTS
> >
> > But I failed with error messages as following:
> >
> >
> > -bash-3.00$ run-additionalDN.sh start 1
> > starting datanode, logging to
> > /data/hdp/additionalDN/1/logs/hadoop-gpadmin-datanode-solsvr2.out
> > Usage: java DataNode
> > [-rollback]
> >
> > Regards,
> >
> > Xiaobo Gu
