On Wed, Apr 1, 2009 at 10:48 AM, Stef Telford <stef@xxxxxxxxx> wrote: > Scott Marlowe wrote: >> On Wed, Apr 1, 2009 at 10:15 AM, Stef Telford <stef@xxxxxxxxx> wrote: >> >>> I do agree that the benefit is probably from write-caching, but I >>> think that this is a 'win' as long as you have a UPS or BBU adaptor, >>> and really, in a prod environment, not having a UPS is .. well. Crazy ? >>> >> >> You do know that UPSes can fail, right? En masse sometimes even. >> > Hello Scott, > Well, the only time the UPS has failed in my memory, was during the > great Eastern Seaboard power outage of 2003. Lots of fond memories > running around Toronto with a gas can looking for oil for generator > power. This said though, anything could happen, the co-lo could be taken > out by a meteor and then sync on or off makes no difference. Meteor strike is far less likely than a power surge taking out a UPS. I saw a whole data center go black when a power conditioner blew out, taking out the other three power conditioners, both industrial UPSes and the switch for the diesel generator. And I have friends who have seen the same type of thing before as well. The data is the most expensive part of any server. -- Sent via pgsql-performance mailing list (pgsql-performance@xxxxxxxxxxxxxx) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-performance
