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| MQ Active-Passive DR using VM SRM |
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| LouML |
 Posted: Tue Dec 13, 2016 7:23 am Post subject: |
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Partisan
Joined: 10 Nov 2005
Posts: 305
Location: Jersey City, NJ / Bethpage, NY
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This is a very interesting discussion. As we're also considering SRM, I really appreciate the input from some of the more seasoned MQ veterans here.
We run an Active/Standby setup on Linux VMware running MQ Server 8.0.0.5. As for failing back to Prod, we've generally remained on DR until the weekend, even if Prod was recovered earlier. It makes the Prod cleanup much simpler as we basically no longer care about any residual messages and are back to a clean queue manager.
@fjb_saper - Does your SRM solution integrate the replication of the Data and log files? Have you had any issues?
We're also looking into an MQ appliance with HA and real-time data replication to replace our current setup.
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Yeah, well, you know, that's just, like, your opinion, man. - The Dude |
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| fjb_saper |
| Posted: Tue Dec 13, 2016 11:50 am Post subject: |
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Grand High Poobah
Joined: 18 Nov 2003
Posts: 20756
Location: LI,NY
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| LouML wrote: |
This is a very interesting discussion. As we're also considering SRM, I really appreciate the input from some of the more seasoned MQ veterans here.
We run an Active/Standby setup on Linux VMware running MQ Server 8.0.0.5. As for failing back to Prod, we've generally remained on DR until the weekend, even if Prod was recovered earlier. It makes the Prod cleanup much simpler as we basically no longer care about any residual messages and are back to a clean queue manager.
@fjb_saper - Does your SRM solution integrate the replication of the Data and log files? Have you had any issues?
We're also looking into an MQ appliance with HA and real-time data replication to replace our current setup. |
If you are using multi-instance qmgrs across environments (prod/dr) and use replicated storage, you have to be very careful when starting a host or MQ in an environment. Assuming you start at the same time (or very close) in both prod and DR and the file lock did not yet have the time to replicate, you might just have both instances (active and standby) running in active mode at the same time... Agreed the time interval is tiny and you just have to hit it ... but then they did that one time... Had little problems because there were no messages, but that's the main reason the client decided to go on an active / dark for prod /dr. Eliminate 80+ % of the risk where you can... 
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| PeterPotkay |
| Posted: Tue Dec 13, 2016 4:51 pm Post subject: Re: MQ Active-Passive DR using VM SRM |
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Poobah
Joined: 15 May 2001
Posts: 7722
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| Old Lag wrote: |
Unless you are using Sync Disk (or Async with Consistency groups) - neither of which my customer is planning to use by the way - how on earth are you going to avoid the sort of mess you could end up with inconsistent Cluster state across all the SYSTEM.CLUSTER.REPOSITORY.QUEUEs ?
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If you don't replicate synchronously or asynchronously, what are you working with in the DR site in a DR? You lost me.....
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Peter Potkay
Keep Calm and MQ On |
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