that should also work if you have set HADOOP_CONF_DIR in env. best way is to follow down the the shell script ./bin/start-all.sh which invokes ./bin/start-dfs.sh which starts datanode like this "$bin"/hadoop-daemons.sh --config $HADOOP_CONF_DIR start datanode $dataStartOpt Yes, you need to start tasktracker as well. Thanks, Lohit
----- Original Message ---- From: Keliang Zhao <[EMAIL PROTECTED]> To: core-user@hadoop.apache.org Sent: Friday, July 11, 2008 4:31:05 PM Subject: Re: How to add/remove slave nodes on run time May I ask what is the right command to start a datanode on a slave? I used a simple one "bin/hadoop datanode &", but I am not sure. Also. Should I start the tasktracker manually as well? -Kevin On Fri, Jul 11, 2008 at 3:56 PM, lohit <[EMAIL PROTECTED]> wrote: > To add new datanodes, use the same hadoop version already running on your > cluster, the right config and start datanode on any node. The datanode would > be configured to talk to the namenode by reading the configs and it would > join the cluster. To remove datanode(s) you could decommission the datanode > and once decommissioned just kill DataNode process. This is described in > there http://wiki.apache.org/hadoop/FAQ#17 > > Thanks, > Lohit > > ----- Original Message ---- > From: Kevin <[EMAIL PROTECTED]> > To: core-user@hadoop.apache.org > Sent: Friday, July 11, 2008 3:43:41 PM > Subject: How to add/remove slave nodes on run time > > Hi, > > I searched a bit but could not find the answer. What is the right way > to add (and remove) new slave nodes on run time? Thank you. > > -Kevin > >
