Esther Schindler <[email protected]> writes: > My ex-colleague from CIO.com (and, I hope, friend forever) Kim Nash is > working on an article. She asked via Twitter: > > >>need some perspective for article i'm writing: what's the longest > your data center has gone without downtime? is 343 days a lot?
No. that's kindof pathetic. I'd expect that much out of a tier1 with a cheap UPS. see: http://www.adc.com/us/en/Library/Literature/102264AE.pdf for details on data center 'tiers' here is a shorter explanation: http://www.webopedia.com/TERM/D/data_center_tiers.html (of course, I mostly only count power/cooling for data center uptime. For network uptime, you should have redundant connectivity. Most network downtime, once you have sufficient redundancy, is due to 'human error' on the part of your net admin, not site downtime, in my experience.) My experience has been that if you stick with good data centers (rather than building something yourself in the spare office with a couple portable A/C units) outages caused by the datacenter are exceedingly rare. now, they can also be exceedingly catastrophic, so it's still a good idea to have multiple locations if your system is important enough to pay for that sort of thing, but still, the data center is usually the last thing you need to worry about. server hardware dies a whole lot more often than datacenter power systems do. (of course, if your system can withstand a data center going out, your system can also withstand any one bit of hardware going out. When I worked for $massive_employer most events that caused us to shift load from one datacenter to another were because we rolled out new configs to one data center at a time. If you fucked it up badly enough that you couldn't roll back, you could just shift load to a data center that you hand't broken yet.) -- Luke S. Crawford http://prgmr.com/xen/ - Hosting for the technically adept http://nostarch.com/xen.htm - We don't assume you are stupid. _______________________________________________ Discuss mailing list [email protected] http://lopsa.org/cgi-bin/mailman/listinfo/discuss This list provided by the League of Professional System Administrators http://lopsa.org/
