On Thu, Nov 18, 2004 at 02:01:19PM +0800, Ariz C. Jacinto wrote: > 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". >
Such machines with only a single power supply should not be used for serious high-availability enterprise computing. In my experience, power supplies are the most susceptible of all single points of failure in any computer. I have many more incidents than I care to remember where a machine that would otherwise have been up for a very long time had its record cut short by a failed power supply. Most good enterprise machines I have seen have got at least two such redundant power supplies, many have three or even four. > 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. Off-site is also fairly complicated and expensive to set up if you want to use it for high availability. It is much simpler to use an off-site backup as a standby site that is able to recover the functions of a failed primary site with operator intervention. -- dido We pledge allegiance to the Penguin, and to the software for which it stands. One nation, under Linux, with Free software and unlimited bandwidth for all. http://stormwyrm.blogspot.com/ -- Philippine Linux Users' Group (PLUG) Mailing List [EMAIL PROTECTED] (#PLUG @ irc.free.net.ph) Official Website: http://plug.linux.org.ph Searchable Archives: http://marc.free.net.ph . To leave, go to http://lists.q-linux.com/mailman/listinfo/plug . Are you a Linux newbie? To join the newbie list, go to http://lists.q-linux.com/mailman/listinfo/ph-linux-newbie
