[ale] Linux Cluster Server Room

[Jeffrey B. Layton]

Just to echo Bjorn's comments - please watch your power
conditioning! I know a good contact that help explain
what to look for if any one needs it (actually, he's probably
the more prolific posted on the beowulf mailing list, but
the list is down right now and likely will be down for a
while).

Thanks for the reinforcement Bjorn. Numbers help
convince people about the validity of the post :)

Jeff

>On Mon, 19 Apr 2004, Jonathan Glass wrote:
>
>  
>
>>Just for the cluster, I have a 6kVa BestPower UPS.  It'll run all 16
>>nodes for about 15 minutes.
>>    
>>
>
>The BestPower units are increadible. Lots o' juice, great filtering, great
>monitoring via front panel and serial, very robust. Make sure you get a
>unit with proper power factor conversion (We were accidentally sent one
>without and what a headache!).
>
>On Mon, 19 Apr 2004, Jeffrey B. Layton wrote:
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>  
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>>I'll give you my 2 cents about clusters and UPS's if you wish.
>>
>>A good cluster configuration will treat each compute node as
>>an appliance. You don't really care about it too much and it
>>doesn't hold any data of any importance. What you care about
>>is the master node and/or where the data is stored These
>>machines can have their own UPS or a single UPS to cover
>>the machines (they may be more than one). Then take the cost
>>savings (if you can) and put them into more nodes, or a better
>>interconnect (if needed), or a large file system, or a better
>>backup system, or .... well, you get the picture.
>>    
>>
>
>If you go this route, and I know people who have, be sure to get good
>power conditioning for the nodes. Power outages often come hand-in-hand
>with other problems (such as spikes) that a UPS or power conditioner can
>help prevent.
>
>(Jeff mentioned this -- I just wanted to emphasize!)
>
>	bjorn
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