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Operating Systems AIX AIX HACMP Active/Passive Config Post 302442117 by bakunin on Tuesday 3rd of August 2010 09:50:22 AM
Old 08-03-2010
Quote:
Originally Posted by mk8570
In case of failover, I believe application will still be fine , as it will pick up boot ip of the failover node (local node) in that case.
The point of HACMP is that users can rely on a certain IP address delivering a certain service regardless of some single system being operative or not. Suppose the following situation: for the user a certain database is always available at IP 1.2.3.4, regardless of machineA being up (and answering under this address) or machineB being up (and answering under this address). Both machines will be aware of the state of the other and HACMP is a set of rules how the application, its data and it related IP addresses are transferred from one machine to the other in case of failure of one of these machines.

If your application picks up any IP address at random this process is not working any more and you might check if you really need HACMP in this case.

Shockneck is absolutely correct: you may want to get some general knowledge about the concepts and workings of HACMP (for instance by downloading and reading some Redbook) before you attempt to configure a cluster.

I hope this helps.

bakunin
 

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trigger(8)						      System Manager's Manual							trigger(8)

Name
       trigger - trigger a target node to request a down-line load

Syntax
       /etc/trigger node [ options ]

Description
       The command triggers the bootstrap mechanism of a target node, causing the target to request a down-line load.  Once a target node is trig-
       gered, it loads itself in whatever manner its primary loader is programmed to operate.  The target node could request a down-line load from
       the host that just triggered it or from another adjacent node, or the target node could load itself from its own mass storage device.

       The  node argument is the name or address of the target node.  A node name consists of from one to six alphanumeric characters.	For single
       networks, a node address consists of a decimal integer (1-1023).  For multiple networks, a node address consist	of  two  decimal  integers
       (n.n), where the first indicates the network number (1-63), and the second indicates the node address (1-1023).

       The  command requires the identification of the service circuit over which the load is performed, the Ethernet hardware address of the tar-
       get node, and the service password needed to gain access to the target.	This information is included in the nodes database entry  for  the
       target node.  A node entry is defined with the command.	For further information, see Alternatively, you can choose not to include a target
       node's service password in the nodes database for security reasons.  You must therefore specify this value in the command line by using the
       -p option.

Options
       -p     Uses the specified service and password (next arguments) in accessing the target node.

Examples
       This command triggers node Bangor to issue a down-line load request:
       # /etc/trigger bangor <RET>

See Also
       mop_mom(8), addnode(8), load(8), remnode(8), getnode(8), ccr(8)
       Guide to Local Area Transport Servers

																	trigger(8)
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