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Cliff · Posted: Tue Sep 25, 2001 6:23 am Post subject:

Hello, all.

If anone has any experience of using Legato software for failover between two Win2K boxes running MQ then I would be delighted to hear from them.

We have an OS/30 app sending messages to a remote queue which lurks on a Win2K box at a geographically remote site, supporting a workflow application and message sequence is critical. Because of this, it has been decided to use a single queue manager and this Legato software (I only found out about it this morning!) to control failover between a a main and a backup box. Legato apparently works by mirroring between D drives (it doesn't touch C drives, it seems) so when Box1 falls over and Box2 kicks in, all your data is as it should be and everything works as if by magic. That's the theory, anyway.

We have installed MQ with program data on C and logs and queue data on D on both machines, created same-name qmgrs, queues and channels, and sent a persistent message from a third box to Box1. Failover to Box2, and no messages. Had to reset channel sequence numbers, of course. What's going on????

I would note that MQ has been uninstalled and reinstalled on both machines. We can send messages to Box1 or Box2 individually but I expected message data to be there after failover. Also, if I define a new queue it is not apparently 'there' on the second machine after failover.

I am clearly missing something! Any suggestions, pointers towards documentation etc warmly welcomed.

Yours, baffled,

Cliff