> Dennis Clarke wrote: >> Nothing can replace batteries. The more the better. >> Most power solutions should grant at *least* 30 minutes on battery and if >> not then I would not host my gear there. I just finished installing a 45 >> minute battery runtime solution with 16,000 VA of power. It is not that >> costly really to stick in an APC Symmetra SY16K unit when one looks at the >> cost of downtime. > > Most datacenters consume a *lot* of power. Just how many lead-acid > batteries can you fit in one building? (There are probably safety and > weight issues, plus density problems if every other rack in your > datacenter is a UPS).
I wasn't clear. The batteries just give you time to start the generator. Up here in Canada the generator will be frozen and, possibly, the diesel fuel will be also. Provided you have a Jeep with winter dueller tires on it and you can get to the server room in 40 minutes then all you need is another ten or 15 minutes to drag the jerry cans to the generator from the fuel shed which ( hopefully ) is not iced over with the locks frozen. You see .. it can be tricky. But cooling is real cheap. Dennis _______________________________________________ opensolaris-discuss mailing list [email protected]
