Re: Power cut if temps are too high

> On May 28, 2019, at 21:27 , b...@theworld.com wrote: > > > On May 28, 2019 at 19:56 o...@delong.com (Owen > DeLong) wrote: >> It’s unlikely to apply to much of anything in a datacenter other than disks. > > Ok, disks, a mere bagatelle of a concern. > > Then again

Re: Power cut if temps are too high

On May 28, 2019 at 19:56 o...@delong.com (Owen DeLong) wrote: > It’s unlikely to apply to much of anything in a datacenter other than disks. Ok, disks, a mere bagatelle of a concern. Then again obviously disks have gotten much, much better about thermal change since people in, e.g., temperate

Re: Power cut if temps are too high

It’s unlikely to apply to much of anything in a datacenter other than disks. The reason it applies to disks is because rapid cooling of a drive will lead to uneven cooling of the platters which may cause abnormal stresses leading to shattering and/or warpage (depending on the material the drive

Re: Power cut if temps are too high

Something to keep in mind is that some equipment, disks in particular, should only be cooled at a certain rate once they're hot, often annoyingly slow by the specs like 2-3 degrees C per hour but there are probably circuits sensitive to this also which could be anywhere. It came up because it ha

Anyone from OpenDNS

Good afternoon list, Anyone on the list from OpenDNS willing to contact me offlist? Somehow my $dayjobs SSL cert if being munged on your service. Thank you Sam Moats

Re: Flexible OTN / fractional 100GbE

Hello Jason, Thanks for your answer. Le 28/05/2019 à 13:02, Jason Lixfeld a écrit : > IP Infusion’s OcNOS is geared towards OCP gear, and while it’s not > exactly what you’re looking for, I didn't see any mention of OTN in their software's specs. OTN is important for this project because we'd

Re: Power cut if temps are too high

On May 27, 2019, at 11:00 AM, Dovid Bender wrote: > > Hi, > > Is anyone aware of a device that will cut the power if the room goes above X > degrees? I am looking for something as a just in case. I would personally make one with an ESP32 (micro controller with wifi) and a (normally closed) re

Re: Power cut if temps are too high

Warren Kumari wrote on 28/05/2019 14:45: There isn't much point to this story, but I've got a cold, and wanted to share...:-P whoever brought this cold to the RIPE meeting and infected a bunch of us has a lot to answer for, damn them. :-( Nick

Re: Power cut if temps are too high

I used to work for a small, fairly crappy ISP -- the "datacenter" was a converted brick garage / loading dock. In order to provide cooling, they had chipped out a bunch of bricks, and mounted in 8 or so AC units, all in a line. We monitored everything with WhatsUp Gold[0] - one (hot) night I'm onc

Re: Power cut if temps are too high

On 2019-05-27 18:18 +, Mel Beckman wrote: > Before the trigger temperature is reached, the NMS would have sent > various escalating alarms to on call staffers, who hopefully would > intervene before this point. Would they actually have time to react and do something? In our datacenters, we r

Re: Flexible OTN / fractional 100GbE

> On May 28, 2019, at 6:41 AM, Jérôme Nicolle wrote: > > Hi NaNOG ! > > I'm looking for a muxponder that would take OTU4s on the network side > and provide 10/40/100GbE on the client side, with some kind of > oversubscription, as to provide a "fractional 100GbE" e.g. starting with > 30-60Gbps

Flexible OTN / fractional 100GbE

Hi NaNOG ! I'm looking for a muxponder that would take OTU4s on the network side and provide 10/40/100GbE on the client side, with some kind of oversubscription, as to provide a "fractional 100GbE" e.g. starting with 30-60Gbps commit that could be upgraded to 100GbE when network capacity is availa

China Telecom people at NANOG 75

Peace, There was some sales manager at the San Francisco meeting, from China Telecom, whom I had a chat with. I have lost their business card since then, and the attendee list for the 75th meeting is already missing from cvent dot com. If they are reading the mailing list, then I'd ask them to d

Re: Power cut if temps are too high

Time Delay Relays are available with fixed or variable settings. if you're going the mechanical approach vs scripted monitor and SNMP sort of trigger, you can use this to cause a standard relay or SCR to trip to raise the alarm (and hopefully also flash a warning light and/or audibly sound an alert