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| MSCS cluster : asymmetry in specs |
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| shogan2003 |
 Posted: Mon Nov 27, 2006 3:28 am Post subject: MSCS cluster : asymmetry in specs |
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Centurion
Joined: 03 Jul 2003
Posts: 133
Location: London
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Hi
We're building an acceptance envrionment, Windows 2003, WBIMB6, WMQ6.
MSCS Clustering : config manager + brokers on same machines.
Active:passive configuration.
Sorry I don't have any more details to hand, but all I know so far apart from the above is that the hardware specifications of each machine in the proposed cluster are different.
Generally speaking, will a cluster hold together provided the software requirements are satisfied ?
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| jefflowrey |
| Posted: Mon Nov 27, 2006 6:43 am Post subject: |
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Grand Poobah
Joined: 16 Oct 2002
Posts: 19981
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Generally speaking, one wants a node that has failed over to run at the same capacity as it had before it failed over.
A reduction of capacity in a failed over state will presumably have measurable business impact. This business impact should presumably be large enough to justify a full capacity failover machine.
Sometimes managment has to learn these thing the hard way, rather than by reading a document that clearly spells it out.
In other words, it is probably a false economy to purchase failover machines that are not the same capacity as the primary machines.
Technically, I would expect that MSCS would be capable of preserving a cluster across two machines that are not physically alike. I would also expect that doing so would increase the risk of MSCS failing in subtle ways at inappropriate times, however.
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