Cooling In Datacenter

Apr 13, 2007

Having cool air from the top of rack is better than from the bottom of rack (using raised floor)? Or vice versus?

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Air Cooling Versus Liquid Cooling

Mar 15, 2008

I seem to have gone over this a hundred times, but wanted to get feedback from the community. Has anyone out there been able to really make liquid cooling work in their data center considering the additional space utilization and expensive price point.

We've found that liquid cooling vastly more expensive than what we are doing and am curious what some out there might be doing.

For us we've found that high density air cooling (top down, and capped hot/cold row configuration, and overhead air extraction) can get us to a max density of about 10 kW per rack. We use a chilled water system for the additional HVAC needed to get us above the standard 5 kW max, but this is for the air handlers themselves and not chilled water for the in row rack cooling. The problem is the in row chilled water cooling makes us lose a cabinet of space for every cabinet of higher density. For this to work (simple situation) we would need to attain rack densities of at least 20 kW given the loss of floor space.

We use APC Cabinets and infrastructure and even they have said if you try and get about 20 kW with the liquid cooling it becomes problematic. Given these governing characteristics in addition to the overwhelming cost, is anyone out there actually pursuing this in a colocation environment. To me it just doesn't seem to make sense.

Perhaps the cost needs to come down, but even then what are you gaining if it is a 1 for 1 trade off.

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365main Cooling

Jan 22, 2007

The air coming into my rack in colo3 right now is in the mid '80s.

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Cooling / Power Calculation

May 29, 2008

The company I work for is starting to have some cooling issues in our server area. We have basically doubled our server equipment in the room without upgrading the air conditioning unit in the room. Temperatures are getting really high in the room (sometimes reaching 85F which is just WRONG!) and we are trying to get it replaced.

Since my boss is the one making decisions I thought I would try to help him out a little bit with some of the information/calculations he needs.

My questions are:

1. When calculating watts for a redundant power supply do you double what the power supply is rated for? So on one Dell PowerEdge 2950 it shows that I have a 750W redundant supply. Would that be 1500 Watts?

2. Do you calculate your cooling needs for max wattage or do you calculate a percentage of what each power supply is rated for?

3. What percentage would you multiply your final total Watts by to accommodate possible future additions? 10%? 25%?

We currently have:
2x PowerEdge 2950 - 750W Redundant
1x PowerEdge 1950 - 670W Redundant
2x PowerVault NX 1950 - 670W Redundant
1x PowerVault MD3000
3x APC Smart UPS 3000
1x APC Smart UPS 1400
2x PowerConnect 6224
2x PowerConnect RPS-600
3x PowerConnect 5324
1x Cisco 2801
1x Cisco 2821
3x Unknown wattage servers redundant power(All the same specs)
1x Unknown wattage server redundant power
1x Unknown wattage single power supply
Then a few other small devices like external modems, KVM and a small-mid sized phone system.

I am not an electrical expert but I am calculating that it is going to be about 10,000 - 12,000 Watts?

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Equinix Secaucus (NY2) Cooling

Apr 25, 2008

Equinix Secaucus NY2 (275 Hartz) seems to have cooling prolem for the last 1 hour. The whole DC becomes hot. I went out one hour ago, came back and it's so hot now. I don't have temp now, ut I think it's around 85F (up from around 65F typical).

If you are in the DC, have fun working ... I wonder how much longer I can work here Hope they fix this soon, or else......

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SC512 Cooling With A Desktop Board

Nov 5, 2007

I'm specing out a box for small dedicated servers and am looking at the SC512 with a desktop board (Intel D964GZISSL since I don't have to cut anything). Should I be using active cooling since it's a desktop board, or will a large passive heatsink be sufficient? I'll be using Celeron Ds, probably a 356. It's power usage is quiet low.

It looks like the heatsink on the motherboard might restrict airflow a bit.

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Efficient Rack Cooling - Hardware Placement

Aug 7, 2009

We are not rack dense in a standard 42 rack.

We currently put 2U solid spacers on the front. As well, I run the switch with the ports facing frontward and use a cable manager on top and bottom of the switches.

I can see from some of your pics in the other thread....that you place the networking equipment in reverse. It depends on how the fan is facing on the networking equipment as

I don't like to have fans facing the inlet portion of the rack.

Any theories or practices ya'll follow?

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Aug 11, 2007

how the inside of a DC is but I was looking at NetDepot's.

I thought that they used rackmounts in datacenters?

Like these:[url]

These appear to me as desktops?


Am I mistaken?

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Jul 20, 2007


Which one of those datacenters would you choose your site to be hosted at?

I'm leaning towards softlayer, and then FDCServers (especially with the upgragde on august 1).

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Apr 25, 2008

Has anyone ever experienced first hand about CalPop Datacenter i hear they are good wanna see feedback from the WHT members i gotten a really good deal!

I started a poll the poll will be up for 24 hours!

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Joe's Datacenter Colocation

Aug 7, 2009

I'm looking around for a nice, cheap colo place for a Dell PE 2650 I just purchased...


* At least burstable to 10Mbit... dedi 10 is nice.. 100 is nicer..

* About 1000GB xfer should be good to start, I guess I can work with less

* Cheap IPs with no problems obtaining more

* Cheap remote hands since there's really not much in the RI/MA area. I will be going to school in upstate NY so I guess something around there would be cool too. I'm willing to ship anywhere though.

* Discounted/included DirectAdmin would be really nice...

* Not going to be selling IRCd stuff unless it's allowed and nice firewalls. I will probably only use it for a personal IRCd and irssi session.


* Joe's Datacenter [url]

This company seems too good to be true... they offer great services for great prices and have many good features. I also spoke to an admin who said he will be able to include a DirectAdmin license for free. They include 5 IPs right off the bat. I got about a reply in an hour at like midnight from Joe (or just another Joe) himself.. and I'm not even a customer! They do free reboots. $50 to colo our 2U with 1500GB and 100Mbit. It's 25 extra for unmetered w/10Mbit but I'm sure the admin would be willing to just offer more b/w staying at 100Mbit instead of moving to a 10Mbit port.

* FDC Servers

Great reputation.. Pretty good prices for what I would imagine to be quality service. Not much more I can say about them.. Did not ask them about DirectAdmin.


I think I'm mainly just looking for any input on Joe's Datacenter because I really think I want to start my company there. If anyone has any better offers I'm open to anything.. but DirectAdmin would be really nice... just remember that.

I'm also looking for a solution to HyperVM... LxLabs (to-be LxCenter I guess?) is now releasing it for free.. I'm not sure if it's patched yet or not though. I think I might just start with HyperVM for now since noone is going to target us.. seriously.. we are two kids with like 2 clients right now. We can always migrate later if HyperVM never takes off again.

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Starting A Datacenter

Oct 10, 2009

What if i got a really good connection to this house i have in Sweden and bought some servers there, is it a good idea and would it sell? How hard is it to get a good connection, the house is in a fairly populated area of Sweden and i have partners who could help run it and do support 24 hours.

But its just a thought and we would start small. What do you guys think?

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How Do You Find Joe's Datacenter

Oct 3, 2009

i want to know more about there service.
does any one work with them?
i need more review about them.

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Datacenter From My House

Aug 4, 2009

I just got a phone call yesterday because my house I just moved into came with a small peice of land about 3 miles away * no clue why* And a company wanted to rent it out for colocation. Is this a scam or should I do it? They said it would only hold 60 servers. The building on the land they would be renting already has backup generators emergency lights etc just no internet leading to it.

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European Datacenter

Jul 24, 2009

My company is about to start a project and need about 100 servers within 3 months. I am looking for a list of afordable and reliable unamanaged server providers from Europe. Can you suggest some? Which datacenter should I contact for such a project?

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Best Datacenter Malaysia

Aug 14, 2009

are there any datacenters in the us that got a good conection to malaysia ??
and are not that expensive like in asia itself ??

i ask it because i know some1 from malaysia and he got a ping of 450 to conect to my server ( a bit high , isnt it )

the other datacenters/company's i found are prices of 200 - 300$ for a dual core

so i was wondering if there are some cheap datacenters with some good quality to those country's

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San Jose Datacenter

Apr 15, 2008

Anyone know which providers have san jose datacenters?

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Datacenter Lanzarote

Sep 2, 2008

any datacenters on lanzarote ? my google searches found nothing (and yes i need it on lanzarote not anywhere else in spanin)

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How Much It Take To Make A Datacenter

Mar 15, 2008

I was just wondering and searching for it but i couldnt find the estimated answer, anyone who have made one or operate one can answer me.

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DataCenter In Toronto

Feb 19, 2008

I want to get a server in Toronto and am looking for some datacenter recommendations for the area. I seen a thread from last May but would like some more current info. Iíve been looking at either ColoHotel or 3z, does anyone have any experience with either of these locations? Also does anyone have any other suggestions on who to look at or who not to?

My requirements are pretty basic 100Mbit would be better then not, remote reboot, 24/7 access.

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Creating A Datacenter

May 4, 2008

I have a old pentium 2 lying around. I was actually wondering if I install a smll linux distro such as DSL linux, is there a way to make it into a fileserver only?

3 comptuers will connect to it.

My main computer and server will use the same internet (ive got a 5MBS line but right now I am just doing an expirment so I dont care if its slow.)

theres a laptop which connects wirelessly using my neighbours (i dont have wireless) so thats a whole different IP and differnt ISP.

and my dads computer which is about 3 KM away.

So I want to do it, store like a couple of word documents

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Picking A Datacenter

Apr 23, 2008

we're in the process of revamping our website and was curious what you, the customers, look for when going to a datacenter's website. Do you like seeing customer comments? Upfront pricing? Facilities' amenities? Which providers' websites do you think are good examples of what a good website should look like?

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May 15, 2008

I read a lot of positive comments about, his service, his professional and fast support, etc. but I was unable to find informations and (better) some pictures of their datacenter.

Their website come from web 0.1 (alpha) era and there are not information about this. So, if someone has more informations, I kindly ask:

Do you know some more details about datacenter structure, power redundancy, ups and, moreover, diesel generators?

Do you have some picture of this datacenter?

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How To Build Your Own Datacenter

Oct 15, 2008

I am making some business plans and having an independent datacenter is one of them. Certainly it isn't easy as leasing a space, and buy some stuff. Some of the things I have to watch out for are network activity, getting bandwidth support, power supply, get an engineering company to design the facility and a lot of stuff.

Are there any companies who handles all that? What would be the specific steps to accomplish my agenda?

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VPS In Gigenet Datacenter

Dec 4, 2008

Does anyone know of a reseller (as gigenet doesn't sell them directly AFAIK) of VPSs at the gigenet datacenter?

I need a new VPS for a new project and I'm looking at one located in the midwest and Chicago seems a perfect location. My project isn't big enough to require a dedi, but I was hoping to find a vps company who has nodes at gigenet.

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Datacenter In California

Nov 27, 2008

Is there a great webhost with their datacenter in California?

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WorldStream Datacenter

Sep 26, 2008

Does anbybody has any experience with WorldStream datacenter?

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Serverbeach, Which Datacenter

Mar 28, 2008

I've heard people talk about it being important to pick the right datacenter if you go with serverbeach. Other than the two power outages in the VA one, what are the differences? Do they all use pure Peer1 bandwidth?

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Distance From Datacenter

Mar 27, 2007

What would be the furthest (driving time) you would want to be from the datacenter where your servers are?

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Best Choice For A New Datacenter

Jun 19, 2008

if I could get some recomendations on which datacenter you'd suggest I contact for new servers?

totally fed up with the non-support at thePlanet, and I'm now investigating ded servers at another spot.

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DataCenter Move

Mar 28, 2008

We are going to be moving our 10 Servers and various other equipment to a new facility here in Chicago. I have a few question I wanted to ask to backup my current thinking.

We are primarily a web host so all of out users either have their DNS set to our DNS server or they have a dedicated IP and an A record pointed to it. Currently we run a private NAT and have private IP's on the internal servers. The firewall handles the NAT'ing between the public and private IP's.

The primary question I have is if we change the IP address at our registrar for our DNS will the change still be subject to the 24-48 hours of propagation? Since we are not changing the NS records and only changing the IP's I would have to assume that his changeover should be fairly quick.

Two, im looking for the best way to setup our new cab are they any network admin photo gallery's?

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