Battery learn-cycle = horrible write performance

[Prasana Iyengar]

2009/7/20 Robert von Bismarck <robert.vonbismarck at vtx-telecom.ch>

>  This is not really good news because these servers do not really have
> quieter moments with lower load. They are SIP proxies running the
> registration for our VoIP customers' phones, where each phone registers
> itself with the proxy every 2 minutes, 24x7, unless the phone is switched
> off.
> I will investigate other possibilities, like off-loading the logs (which
> eat 90% of the disk bandwidth) to some other box that does not really care
> if the disks are slow for a while.
>

to mitigate the risk of a power outage leaving the cache with unwritten data
we run the machine with 2 x ps going to different pdu/circuits/breakers. i
know others run it with local UPS. seems like the only alternatives
available.


> For a future PERC, having a controller with two batteries running staggered
> charge cycles would be a nice feature, like the one found on the entry-level
> EMC SAN's.
>
that's a really good suggestion ; i don't think there is any such in the
market ?!
regards,
-prasana

>
> Thanksfor the tips anyway,
>
> Robert
>
>
--------------
prasana.iyengar at gmail.com
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