Re: Temp at Level 3 data centers

[Zachary Winnerman <zacharyw09264 () gmail com>]

That's a good point, though if you are running your breakers that close
I think you have bigger problems, as a power outage, however unlikely,
could cause your equipment to not come back up at all. Software updates
that reboot several servers in quick succession could also cause a
breaker to trip under those circumstances. Unfortunately, there's no way
to tell how close a breaker is to tripping without tripping it. Breakers
may have amp meteres and a rated size, but the actual load before
tripping is +-20% for common models, meaning a 20A breaker may trip as
low as 16A.


On 2017年10月11日 12:58, Matt Harris wrote:
> Another thing to remember - and I've actually seen breakers tripped on
> PDUs due to heat before because of this - is that it's going to spin
> all of your fans harder to keep internal temps down if the ambient
> temp is higher. This will increase your power draw, which means that
> if you're paying for metered power by usage, you're going to pay more
> - those fans really do add up in terms of power. In extreme cases, you
> can draw too much power and trip a breaker on a PDU because every host
> in a rack, or especially those towards the top, are spinning full
> tilt. It's not a good condition and one that you should force them to
> correct. 
>
>
> On Wed, Oct 11, 2017 at 11:54 AM, Zachary Winnerman
> <zacharyw09264 () gmail com <mailto:zacharyw09264 () gmail com>> wrote:
>
>     I recall some evidence that 80+F temps can reduce hard drive lifetime,
>     though it might be outdated as it was from before SSDs were around. I
>     would imagine that while it may not impact the ability for a server to
>     handle load, it may reduce equipment lifetime. It also could be an
>     indication that they lack redundancy in the case of an AC failure.
>     This
>     could cause equipment damage if the datacenter is unattended and
>     temperatures are allowed to rise.
>
>
>     On 2017年10月11日 11:45, Keith Stokes wrote:
>     > There are plenty of people who say 80+ is fine for equipment and
>     data centers aren’t built for people.
>     >
>     > However other things have to be done correctly.
>     >
>     > Are you sure your equipment is properly oriented for airflow
>     (hot/cold aisles if in use) and has no restrictions?
>     >
>     > On Oct 11, 2017, at 9:42 AM, Sam Kretchmer
>     <sam () coeosolutions com
>     <mailto:sam () coeosolutions com><mailto:sam () coeosolutions com
>     <mailto:sam () coeosolutions com>>> wrote:
>     >
>     > with a former employer we had a suite at the L3 facility on Canal in
>     > Chicago. They had this exact issue for the entire time we had
>     the suite.
>     > They kept blaming a failing HVAC unit on our floor, but it went
>     on for
>     > years no matter who we complained to, or what we said.
>     >
>     > Good luck.
>     >
>     >
>     > On 10/11/17, 7:31 AM, "NANOG on behalf of David Hubbard"
>     > <nanog-bounces () nanog org
>     <mailto:nanog-bounces () nanog org><mailto:nanog-bounces () nanog org
>     <mailto:nanog-bounces () nanog org>> on behalf of
>     dhubbard () dino hostasaurus com
>     <mailto:dhubbard () dino hostasaurus com><mailto:dhubbard () dino hostasaurus com
>     <mailto:dhubbard () dino hostasaurus com>>> wrote:
>     >
>     > Curious if anyone on here colo¹s equipment at a Level 3 facility
>     and has
>     > found the temperature unacceptably warm?  I¹m having that experience
>     > currently, where ambient temp is in the 80¹s, but they tell me
>     that¹s
>     > perfectly fine because vented tiles have been placed in front of all
>     > equipment racks.  My equipment is alarming for high temps, so
>     obviously
>     > not fine.  Trying to find my way up to whomever I can complain
>     to that¹s
>     > in a position to do something about it but it seems the support
>     staff
>     > have been told to brush questions about temp off as much as
>     possible.
>     > Was wondering if this is a country-wide thing for them or unique
>     to the
>     > data center I have equipment in.  I have equipment in several
>     others from
>     > different companies and most are probably 15-20 degrees cooler.
>     >
>     > Thanks,
>     >
>     > David
>     >
>     >
>     >
>     > ---
>     >
>     > Keith Stokes
>     >
>     >
>     >
>     >
>
>
>
>
>
> -- 
> Matt Harris - Chief Security Officer
> Main: +1 855.696.3834 ext 103
> Mobile: +1 908.590.9472
> Email: matt () netfire net <mailto:matt () netfire net>

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