I probably should clarify my statement about changing the oil... They obviously have had to replace batteries, and do other routine maintenance, similar to a car, but, anyway, hopefully you get the idea.
On Tue, Jul 19, 2011 at 1:33 PM, John Thompson <jthompson...@gmail.com>wrote: > Some thoughts... > > Depending on your budget, there is always the option of a "properly > installed generator" that will pair with and charge your ups batteries. > There are electricians and companies who can do this for you. > > http://www.cumminsonan.com/cm/products/propane > > http://www.nstpower.com/index.html > > We have had good luck with an onan propane generator over the past 10 years > or so. Literally, all they've done to it is change the oil in the thing, > and crank it once a month for 10 years. > First the UPS kicks in, then while the server is running on batteries, the > generator fires up and relieves the batteries, while the UPS and some other > devices regulate the power. > > Of course, if you have 10 users and a budget of a few thousand a year, I'm > guessing that would not be a good option for you. We have over 300 users > and are running on AIX. > > Otherwise, I think those other options given by previous posters are your > best bet: > > 1) Find a way to make the UPS "gracefully" shutdown your Universe server > (along with Universe) I know APC has quite a bit of Windows based software > along these lines for fairly cheap. > > 2) Virtualize the server and use some of those features. Don't expect > Hyper-V to do it for you without a lot of third party help. > > > > On Tue, Jul 19, 2011 at 12:27 PM, Wols Lists <antli...@youngman.org.uk>wrote: > >> On 19/07/11 16:30, Arnold Bosch wrote: >> > Hi >> > >> > Has anybody ever tested how Universe behaves if the server is hibernated >> > to disk ? Does it work and resume locally logged on sessions properly >> > when the server is brought back up again? >> > Obviously all network sessions will be aborted, but I'm not concerned >> > about that. >> >> What's doing the hibernate? Do you mean like a laptop suspend? >> >> My first thought was you meant suspending a VM, but it doesn't read >> quite like that to me. >> >> Having been following this with the linux kernel (yes, that's not >> Windows, I know), if you mean suspending a VM of some sort, yes the >> system should just resume with minimal problems and carry on as if >> nothing has happened. I run XP in a VM on linux, and rarely have >> problems even though things like "My Documents" etc are on a (from >> XP's point of view) network disk. >> >> If, however, you really mean "hibernate", with Windows flushing *itself* >> to disk, that's hard to get right. You also said "without a proper >> shutdown", implying that it didn't hibernate, but crashed. >> >> Basically, unless it's totally controlled like saving a VM, I'd be very >> wary of something that "may have saved" itself after a power failure. >> >> Sounds like it might be worth investing in a checkpointing file store - >> checkpoint before overnight processing, then catch-up afterwards. If >> you've got a mirror you can break, you could break the mirror and back >> up one copy while the other copy is updating, before you resume the >> mirror. >> >> Cheers, >> Wol >> _______________________________________________ >> U2-Users mailing list >> U2-Users@listserver.u2ug.org >> http://listserver.u2ug.org/mailman/listinfo/u2-users >> > > > > -- > John Thompson > -- John Thompson _______________________________________________ U2-Users mailing list U2-Users@listserver.u2ug.org http://listserver.u2ug.org/mailman/listinfo/u2-users
