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Operating Systems AIX Aix hacmp cluster question (oracle & sap) Post 302282445 by shockneck on Saturday 31st of January 2009 06:56:18 AM
Old 01-31-2009
Quote:
Originally Posted by filosophizer
[...]3 nodes (A, B, C) all configured to startup with HACMP [...]
Don't know whether I got you correctly. I have never seen an admin who wanted his clusters to start up at os boot. In case you are new to HACMP you might not be in an ideal situation for making such a cluster design decision. You can configure HACMP to start up with the os but if you can take some piece of advice: don't do it. IMHO the potential problems by far outweigh the potential adavantages.

Quote:
Originally Posted by filosophizer
I would like to configure HACMP in such a way:

1) Node B should startup first. After the cluster successfully starts up and mounts all the filesystems, then

2) Node A, and Node C should startup ![...]
HACMP is very flexible here, it lets you script everything and you can control when a command is run by pre or post events or by the start/stop scripts. You could create an ssh key with empty password distribute it accordingly to the nodes you want to access and then script the start of the other clusters. Following your description a good place for the startup command might be at the bottom of the RG start script. If you mean to power on the servers themselves you need to script HMC or CSM commands to name two possibilities.
 

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IPCLUSTER(1)															      IPCLUSTER(1)

NAME
ipcluster - IPython parallel computing cluster control tool SYNOPSIS
ipcluster {piexec,local,mpirun,pbs,ssh} [options] DESCRIPTION
ipcluster is a control tool for IPython's parallel computing functions. IPython cluster startup. This starts a controller and engines using various approaches. Use the IPYTHONDIR environment variable to change your IPython directory from the default of .ipython or _ipython. The log and security subdirectories of your IPython directory will be used by this script for log files and security files. POSITIONAL ARGUMENTS
The first positional argument should be one of: {mpiexec, local, mpirun, pbs, ssh}, which are the available cluster types. For detailed help on each, type "ipcluster TYPE --help". Briefly: local run a local cluster mpirun run a cluster using mpirun (mpiexec also works) mpiexec run a cluster using mpiexec (mpirun also works) pbs run a pbs cluster ssh run a cluster using ssh, should have ssh-keys setup OPTIONS
-h, --help show help message and exit EXAMPLE
ipcluster local -n 4 This command will start 4 IPython engines on the local computer. SEE ALSO
ipython(1),ipcontroller(1),ipengine(1) AUTHOR
ipcluster is a tool that ships with IPython, created by the IPython Development Team. This manual page was written by Stephan Peijnik <debian@sp.or.at>, for the Debian project (but may be used by others). Modified by Fer- nando Perez <Fernando.Perez@berkeley.edu> for inclusion in IPython. October 28, 2008 IPCLUSTER(1)
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