Wow that's cool! What kind of hardware are they?
Josh Luthman Office: 937-552-2340 Direct: 937-552-2343 1100 Wayne St Suite 1337 Troy, OH 45373 On Sun, May 15, 2016 at 12:13 AM, Faisal Imtiaz <fai...@snappytelecom.net> wrote: > It would be interesting to note that, we are putting in some new servers, > and in the bios these have a setting that delays a random amount of time > between 50 - 120seconds, before returning to power on state after a power > loss ..... > > :) > > Faisal Imtiaz > Snappy Internet & Telecom > 7266 SW 48 Street > Miami, FL 33155 > Tel: 305 663 5518 x 232 > > Help-desk: (305)663-5518 Option 2 or Email: supp...@snappytelecom.net > > ------------------------------ > > *From: *"Chuck McCown" <ch...@wbmfg.com> > *To: *af@afmug.com > *Sent: *Saturday, May 14, 2016 11:40:09 PM > > *Subject: *Re: [AFMUG] Data center temperatures > > I remembering being at a data center on a hot summer day. Power went > out, generator started. Things were fine... then all the air conditioners > switched on at the same time. Actually stalled the generator. We had to > put sequencers on the AC. > > *From:* Faisal Imtiaz <fai...@snappytelecom.net> > *Sent:* Saturday, May 14, 2016 9:20 PM > *To:* af@afmug.com > *Subject:* Re: [AFMUG] Data center temperatures > > FYI, Electrical Code (NECA) and most datacenters require the power not to > be loaded beyond 80% of breaker capacity... i.e. 16amp draw on a 20amp > circuit. > > Additionally, one also has to have head room on the power circuit to deal > with start up draw (current rush). It's not pretty when you have a crap > load of servers starting up all together > > > :) > > Faisal Imtiaz > Snappy Internet & Telecom > 7266 SW 48 Street > Miami, FL 33155 > Tel: 305 663 5518 x 232 > > Help-desk: (305)663-5518 Option 2 or Email: supp...@snappytelecom.net > > ------------------------------ > > *From: *"Eric Kuhnke" <eric.kuh...@gmail.com> > *To: *af@afmug.com > *Sent: *Saturday, May 14, 2016 7:50:22 PM > *Subject: *Re: [AFMUG] Data center temperatures > > How does a 44U cabinet need 208V 60A for storage arrays? > > In a 4U chassis the max hard drives (front and rear) is about 60 x 3.5"... > > Say each drive is 7.5W TDP, that's 450W of drives. Add another 200W for > controller/motherboard and fans. 650W in 4U. > > 44 / 4 = 11 > > Multply by 650 > > 7150W > > More realistically with a normal amount of drives (like 40 per 4U) a > single 208 30A is sufficient, > > 208 x 30 = 6240W > > Run at max 0.85 load on the circuit, so > > 6240 x 0.85 = 5304W > > In a really dense 2.5" environment all of the above is of course invalid, > you could probably need up to 7900W per cabinet > Then there's 52U cabinets as well... > On May 13, 2016 6:16 PM, "Paul Stewart" <p...@paulstewart.org> wrote: > > Yup … general trends on new data centers are pushing those temperatures > higher for efficiency but also with better designs .. > > > > One of our data centers runs at 78F and have no issues – each cabinet is > standard 208V 30A as you mention but can go per cabinet much higher if > needed (ie. 208V 60A for storage arrays) > > > > *From:* Af [mailto:af-boun...@afmug.com] *On Behalf Of *Eric Kuhnke > *Sent:* May 11, 2016 5:15 PM > > *To:* af@afmug.com > *Subject:* Re: [AFMUG] Data center temperatures > > > > There have been some fairly large data set studies done shown that air > intake temperature for huge numbers of servers, at 77-78F does not > correlate with a statistically significant rate of failure. > > > http://www.datacenterknowledge.com/archives/2008/09/18/intel-servers-do-fine-with-outside-air/ > > > http://www.datacenterknowledge.com/archives/2012/03/23/too-hot-for-humans-but-google-servers-keep-humming/ > > how/what you do for cooling is definitely dependent on the load. Designing > a colo facility to use a full 208V 30A circuit per cabinet (5.5kW) in a > hot/cold air separated configuration is very different than 'normal' older > facilities that are one large open room. > > > > On Wed, May 11, 2016 at 1:58 PM, Ken Hohhof <af...@kwisp.com> wrote: > > I’m not sure you can answer the question without knowing the max heat load > per cabinet and how you manage airflow in the cabinets. > > > > AFAIK it used to be standard practice to keep data centers as cold as > possible without requiring people to wear parkas, but energy efficiency is > a consideration now. > > > > > > *From:* That One Guy /sarcasm <thatoneguyst...@gmail.com> > > *Sent:* Wednesday, May 11, 2016 3:51 PM > > *To:* af@afmug.com > > *Subject:* Re: [AFMUG] Data center temperatures > > > > apparently 72 is the the ideal for our noc, i set our thermostat to 60 and > it always gets turned back to 72, so i just say fuck it, I wanted new gear > in the racks anyway > > > > On Wed, May 11, 2016 at 3:46 PM, Larry Smith <lesm...@ecsis.net> wrote: > > On Wed May 11 2016 15:37, Josh Luthman wrote: > > Just curious what the ideal temp is for a data center. Our really nice > > building that Sprint ditched ranges from 60 to 90F (on a site monitor). > > I try to keep my NOC room at about 62F, that puts many of the CPU's > at 83 to 90F. Many of the bigger places I visit will generally be 55 to > 60F. > Loads of computers (data center type) are primarily groupings of little > heaters... > > -- > Larry Smith > lesm...@ecsis.net > > > > > > -- > > If you only see yourself as part of the team but you don't see your team > as part of yourself you have already failed as part of the team. > > > > >
