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