[Nut-upsuser] Conditionnal shutdown

[Emmanuel Lesouef]

Le Tue, 16 Sep 2008 07:49:04 +0200,
"Arjen de Korte" <nut+users at de-korte.org> a écrit :

> Citeren "Emmanuel Lesouef" <e.lesouef at crbn.fr>:
> 
> > My question is : is it possible to make nut aware of the percentage
> > (or duration) of time before the UPS exhausts its power ? Thus
> > making Nut conditionning the shutdown of the servers depending on
> > the remaining load.
> 
> These are options that some (usually higher end) UPSes have. NUT  
> itself will only support changing the values that set these levels
> in the UPS, but it will not initiate shutdown at a certain battery
> level.
> 
> Both these features require accurate monitoring of the actual
> battery charge and the load that is supplied by the UPS. Devices that
> do this both, invariably will already support shutting down when a  
> (configurable) critical battery level or time remaining has been  
> reached.
> 
> If yours doesn't, it almost certainly will have an entirely battery  
> voltage based charge calculation, which is *not* accurate enough to  
> give a reasonable estimate on the runtime remaining to make this  
> possible. In that case, you'd risk that your UPS suddenly stops  
> because the battery is empty.
> 
> Best regards, Arjen

Is Upssched the workaround to this ? With a trigger to ONBATT, to wait
for several minutes (translated to seconds) until shutting down the
server.

Thanks for your help.

-- 
Emmanuel Lesouef
DSI | CRBN
t: 0231069671
e: e.lesouef at crbn.fr