Rafael 'Dido' Sevilla wrote:
If you're after high availability this is poor design. You've introduced a single point of failure with your high-capacity UPS. Remember that the goal of HA clustering is to eliminate as many single points of failure as possible. It would be preferable to have at least one UPS per server that you have, much better to have more than one...
i agree but i forgot to mention that the other data center is off-site meaning, they have their own set of UPS & gen set.
UPS monitoring and management was a nightmare for us when using the configuration you've mentioned especially when the old machines only have a single PS (not redundant) wherein a secondary UPS would only act as a "genset-for-a-minute".
off-site is still best option for achieving HA since an enterprise shouldn't only tackle HA but BC (business continuity) as well if they were to comply with ISO & BS7799 stds.
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