Compaq Reliable Transaction Router Installationsanleitung PDF herunterladen (Seite 26)

Upgrade Process

2.1 Rolling Upgrade Restrictions

For more complex conﬁgurations, where a node may have combinations of

facilities with different backend/router groupings, use the command SET

NODE/RECOVERY=V32 to set the recovery protocol to the V3.2 algorithm.

Once RTR has been upgraded on all nodes, the recovery protocol can be reset to

its default value (V4.0), and RTR restarted at a convenient time on each node.

This need not be a simultaneous restart on all nodes. RTR can be restarted

on each node one by one after resetting the default recovery protocol, so that

continuous application availability is maintained.

2.2 Uninstalling RTR

Remove commands do not remove all RTR ﬁles from your disks. This is

particularly important when you are upgrading from one version of RTR

to another. You must eliminate all RTR ﬁles from your system, but must

not discard any customized monitor ﬁles in

/rtr

or a journal containing

recoverable transactions in

/rtrjnl

. Copy these to another directory before

completing the uninstall instructions.

/rtrjnl

/rtr

is a symbolic link to another directory, ﬁrst remove the

target directory and all ﬁles contained in it, and then remove the symbolic

link.

2.2.1 Uninstalling on OpenVMS

Complete the following steps to uninstall RTR from your system.

• Stop all RTR processes on the system:

$ RTR STOP RTR

$ RTR DISCONNECT SERVER

• Check for any surviving processes such as

rtrd

and applications

programmed to handle RTR_STS_NOACP, and terminate any such

processes until there are none left. Note that all the RTR ACP and

comserver processes must be terminated before

rtrd

, otherwise they will

create a new

rtrd

The

rtrd

process can now be terminated with the STOP command or by

issuing the following command:

$ RTR DISC SERVER/DAEMON

• Terminate all application processes linked to RTR. If you are running in a

cluster conﬁguration, you must remove RTR application processes from all

the cluster members that use the disk where RTR was installed.

Processes can be terminated with the STOP command, or by a program

that uses $FORCEX.

2–2 Upgrade Process

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