Gregory Maxwell wrote:
On 4/9/06, Daniel Mayer <maveric149(a)yahoo.com>
wrote:
I thought each db server was on a UPS? If not,
then why not? I also thought we had the capability
to go read only from the other server farms when the Tampa farm went down. If not, then
why not?
We are a top 20 website that makes more than enough money to hire enough people to make
sure
services decay gracefully and to make sure we have adequate redundancy. I'm working
on the current
year budget. Please start thinking about your staffing and equipment needs for the rest
of the
year.
In any decent facility house power should be more reliable than a
bunch of small UPSes stuck in your racks. MTBF on small UPSes is not
very impressive.
On the other hand, small UPS's generally do not all fail at once.
In most big facilities, there are generally two power chains, A and B;
the only time both should go off is in the case of a dire emergency that
requires a manually forced power cut. Were the database servers
dual-powered from independent A and B side power supplies, or is there
only a single house feed to each DB server?
-- Neil