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Posted to common-user@hadoop.apache.org by XiaoboGu <gu...@gmail.com> on 2011/07/03 06:09:11 UTC

RE: How to run multiple data nodes and multiple task trackers on single server.

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:guxiaobo1982@gmail.com]
> Sent: Friday, July 01, 2011 11:35 PM
> To: hdfs-user@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