|
North American Network Operators Group Date Prev | Date Next | Date Index | Thread Index | Author Index | Historical Re: Operate until failure
Unnamed Administration sources reported that Sean Donelan said: > > > And what if you are not using APCs? See the menu of systems listed at: http://www.exploits.org/nut/ > One issue with highly redudandent data centers is the failure modes are > "interesting." You don't want to shutdown due to a single UPS failure, so > you don't use something simple like PowerChute Plus. You most likely don't > want to shutdown based on any automatic signal. However, you do want a way > for an operator to gracefully shutdown a lot of equipment quickly when > the decision is made. > > For a server farm, with potentially thousands of individual systems, is > there any standard piece of software you can install on all of the systems > to act as a receiver of a signal to begin a graceful shutdown that does > not depend on a vendor's proprietary interface? Preferabally one which > does not involve running a lot of additional wires. Good point; you'll likely need a box just to talk to UPSi and control shutdowns. That alas, is adding a single point of failure. > Again this is only needed if people want a gracefull shutdown. If > you can live with a hard shutdown, you wouldn't require this. If you > use ctrl-alt-del as a normal management practice, I suspect you don't > really require a graceful shutdown. You really don't want to run all the UPS batteries flat. It will lengthen the recovery time.... (If graceful shutdown is your goal; when power is restored, you want the UPS to FIRST recharge enough so it can again gracefully shutdown, when the power turns out to be back up for just a minute or two....thus you delay restarting the load.) -- A host is a host from coast to [email protected] & no one will talk to a host that's close........[v].(301) 56-LINUX Unless the host (that isn't close).........................pob 1433 is busy, hung or dead....................................20915-1433
|