Aix hacmp cluster question (oracle & sap) Post: 302282648

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Operating Systems AIX Aix hacmp cluster question (oracle & sap) Post 302282648 by shockneck on Sunday 1st of February 2009 07:19:09 AM

02-01-2009

Registered User

Quote:

Originally Posted by filosophizer

HACMP won't start with the OS boot.

I'm glad to hear this. Smilie

Quote:

Originally Posted by filosophizer

I want to start HACMP but it should be in sequence.

I have 3 servers:
SAP Application services are running on 2 servers and Database is running on one of the servers..

So, the question was:

I want HACMP to start the Database server node B first, then it should join in the cluster the application server nodes A,C ;

It can be done by the start-stop script as you mentioned...But i was wondering if there any other way to do it in HACMP ?

Something called Startup Policy / home node online / parent - child dependencies / application monitoring ?[...]

So you need information about HACMP monitors and how to combine them with a run-time policy. A monitor watches out for the existance of a certain process and uses your scripts to react if the process is not there/disappears. Then there are the following run-time Resource Group dependencies available from HACMP 5.3 on:

Bring parent online before or after child.
Bring parent online on same node / different node / same site.

However from the information you supply it would be hard to give detailed information how to setup the RGs. I suggest you check with the cluster docs about how to configure process monitors and custom monitors. Secondly read about the difference between startup monitoring mode and long running mode or the combined monitor that will check both start and runtime. Only monitors and scripts you define/write will ensure that the DB/app will start up in the order you wish.
High Availability Cluster Multi-Processing (HACMP) publications - IBM e(logo)Server Cluster Information Center

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cmrunnode

cmrunnode(1m)															     cmrunnode(1m)

NAME

       cmrunnode - run a node in a high availability cluster

SYNOPSIS

       cmrunnode [-v] [node_name...]  [-t | -w none]

DESCRIPTION

       cmrunnode  causes  a node to start its cluster daemon to join the existing cluster.  This command verifies the network configuration before
       causing the node to start its cluster daemon.

       To start a cluster on one of its nodes, a user must either be superuser(UID=0), or have an access policy of FULL_ADMIN allowed in the clus-
       ter configuration file. See access policy in cmquerycl(1m).

       Starting  a node will not cause any active packages to be moved to the new node.  However, if a package is DOWN, has its switching enabled,
       and is able to run on the new node, that package will automatically run there.

       If node_name is not specified, the cluster daemon will be started on the local node and will join the existing cluster.

   Options
       cmrunnode supports the following options:

	      -v   Verbose output will be displayed.

	      -t   Test only. Provide an assessment of the package placement without affecting the current state of the nodes or packages. The	-w
		   option is not required with the -t option as -t does not validate network connectivity, but assumes that all the nodes can meet
		   any external dependencies such as EMS resources, package subnets, and storage.

	      node_name...
		   Start the cluster daemon on the specified node(s).

	      -w none
		   By default network probing is performed to check that the network connectivity is the same as when the cluster was  configured.
		   Any	anomalies are reported before the cluster daemons are started. The -w none option disables this probing. The option should
		   only be used if this network configuration is known to be correct from a recent check.

RETURN VALUE

       cmrunnode returns the following value:

	       0   Successful completion.
	       1   Command failed.

EXAMPLES

       Run the cluster daemon on the current node:

	      cmrunnode

       Run the cluster daemons on node1 and node2:

	      cmrunnode node1 node2

AUTHOR

       cmrunnode was developed by HP.

SEE ALSO

       cmquerycl(1m), cmhaltcl(1m), cmhaltnode(1m), cmruncl(1m), cmviewcl(1m), cmeval(1m).

						      Requires Optional Serviceguard Software					     cmrunnode(1m)