LOV3, LOV4, LOW1, Foxconn, Ari power outage again
Artur Dubrawski
awd at cs.cmu.edu
Sun Mar 13 12:26:08 EDT 2016
Team,
I cancel the "yellow card" for Ankit.
There will be no further yellow or other cards issued in the Lab.
We may make an occasional exception for a greeting card though.
Machines are built to serve humans, not the other way around.
Predrag please go ahead and purchase the needed UPS.
In the future, please discuss these sorts of issues directly with me.
Cheers,
Artur
On 3/10/2016 4:19 PM, Predrag Punosevac wrote:
> Dear Autonians,
>
> LOV3, LOV4, LOW1, Ari, and Foxconn are out of business again. These are
> our five largest CPU computing nodes. I hate to name the names but here
> it comes. His name is Ankit Laddha and he did that by running the 30
> instances of the same script across the five machines which caused
> original problems yesterday.
>
> I thought I was clear in my earlier message that we had only temporary
> fix for the electricity problem. Let me now give you the full
> explanation. We have old 20 A PDU plugged into 15 A 120V UPS. Dr.
> Barnabas has just purchased 20A 208V PDU. However we will need now to
> purchase 208V 20A UPS listed here for $1500
>
> http://www.apc.com/shop/us/en/products/APC-Smart-UPS-3000VA-RM-2U-LCD-208V/P-SMT3000RMT2U
>
> Unfortunately I didn't check my notes before the purchase and wishfully
> assumed that the UPS donated to us couple of months ago was 208V (which
> is the new standard). It is not. It is an old 15A 120V UPS. So until
> the new UPS is purchased we will have to be little bit more careful how
> we conduct ourselves now when we know that the circuit can be
> reproducibly crashed by large CPU loads.
>
> Mr. Laddha has a yellow card now and if he breaks the circuit again I
> will have no other option but to temporary suspend his lab account.
>
> Best,
> Predrag Punosevac
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