1. What is pdsh?
Pdsh is a high-performance, parallel remote shell utility. It uses a sliding window of threads to execute remote commands, conserving socket resources while allowing some connections to timeout if needed. It was originally written as a replacement for IBM’s DSH on clusters at LLNL. More information can be found at PDSH Web site
2. Setup EPEL yum repository on CentOS 6.
For more information, see Repository of CentOS 6 and Scientific Linux 6
3. Do a yum install
# yum install pdsh
To confirm installation
# which pdsh
4. Configure user environment for PDSH
# vim /etc/profile.d/pdsh.sh
Edit the following:
# setup pdsh for cluster users export PDSH_RCMD_TYPE='ssh' export WCOLL='/etc/pdsh/machines'
5. Put the host name of the Compute Nodes
# vim /etc/pdsh/machines/
node1 node2 node3 ....... .......
6. Make sure the nodes have their SSH-Key Exchange. For more information, see Auto SSH Login without Password
7. Do Install Step 1 to Step 3 on ALL the client nodes.
B. USING PDSH
Run the command ( pdsh [options]… command )
1. To target all the nodes found at /etc/pdsh/machinefile. Assuming the files are transferred already. Do note that the parallel copy comes with the pdsh utilities
# pdsh -a "rpm -Uvh /root/htop-1.0.2-1.el6.rf.x86_64.rpm"
2. To target specific nodes, you may want to consider using the -x command
# pdsh -x host1,host2 "rpm -Uvh /root/htop-1.0.2-1.el6.rf.x86_64.rpm"