On Mon, Mar 8, 2010 at 8:50 AM, Massoud Mazar <[email protected]> wrote: > As far as I have seen, password-less ssh is only required from Master to > slaves, to start/stop slave services. > > -----Original Message----- > From: bharath v [mailto:[email protected]] > Sent: Monday, March 08, 2010 8:47 AM > To: [email protected] > Subject: Password less ssh from slave to slave > > Hi all, > > Do we require a Password less ssh from slave to slave ? > > Thanks > Yes and No. (Mostly no) The hadoop components have their own protocol.
Password-less SSH is used to by start-all.sh components, they using the remote SSH commands. a localstartup looks like this: cd $hadoop_home bin/hadoop-daemon.sh stop namenode bin/hadoop-daemon.sh stop datanode bin/hadoop-daemon.sh stop jobtracker bin/hadoop-daemon.sh stop tasktracker
