Saving Power - HE.NET Colo
Mar 29, 2008
Just colocated at HE.NET and the the 15 amp limitation is a challenge. I'm just wondering what tricks there are to reduce power consumption by computer. Maybe people can add their tricks to this thread.
I'm experimenting at home right now. I got one of those KILL-A-WATT meters. (Egghead $18 - they are GREAT) And I'm measuring power usage with different configurations.
One thing I noticed is that the bios "cool and quiet" setting make a big difference. At idle current drops from 0.90 amps to 0.67. Of course if the processor is running 100% this probably goes away but if you have a cabinet of server and not all of them are maxed out all the time this should add up.
I'm using OpenVZ virtualization which allows my to use hardware more efficiently.
Just wondering if any of you have other tricks that cut electrical usage. Might have to put quad core processors in all my servers for expansion. Wish AMD would get their act together and get high speed quads out there.
Everything I have has 8 gigs of ram now.
Any hard drive setting I should know about?
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Feb 7, 2007
the title says it all per month. just curious since this is something in europe that gets a price bump when it comes to power and space. yes i got two colo servers in different locations but never have i asked.
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Jun 22, 2007
how often does a colo provider's datacenter go down? I'm not talking about resellers or their racks, but the primary provider itself.
This has been the 2nd time (this year I believe) that my datacenter at NAC has suffered a complete power outage [url], their backups failed, and my entire rack of servers were power-cycled.
Luckily I am not a web host but I am running some critical public web services/sites. I have all of the equipment to manage my own colocated machines from afar (monitoring, remote reboot hardware, and KVM/IP hardware for all of my machines) but I'm dead in the water if my datacenter's power is out.
I always ease my pain throughout a network outage or power outage by visiting DSLReports. Their HUGE website is hosted in the same datacenter (probably in the same room) as me and while it is a terrible thing to say, being able to share the downtime with a bigger fish is easier for me to handle.
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Jun 11, 2007
1U colo, 1 mbps, 1 amp power in major China cities
Must have premium, mulit-homed bandwidth, with great connectivity to the US
Must have local cable TV cross-connect via coax, s-video, etc.
Prefer remote reboot
Some or all of the following:
Shanghai, Beijing, Chongqing, Tianjin, Wuhan, Harbin, Shengyang , Guangzhou
OK to have colo and cctv cross-connect in one or more cities - you dont have to do them all.
We do NOT need colo without the cctv availability.
Will need a /30 address space.
1 year minimum contract
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May 15, 2007
a dell 1750 with redundant power supply that has two plugs on the back.
But...
Looking at 1U colo with only one plug available for the 1U price.
Is the only solution to use only one of the two power supplies in the Dell 1750...?
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Jan 3, 2008
I was trying to generate ssh key for my server and get this message below
Code:
[andyj@server ~]$ ssh-keygen -t dsa
Generating public/private dsa key pair.
Enter file in which to save the key (/home/andyj/.ssh/id_dsa): [Enter]
Enter passphrase (empty for no passphrase): [Enter]
Enter same passphrase again: [Enter]
open /home/andyj/.ssh/id_dsa failed: Permission denied.
Saving the key failed: /home/andyj/.ssh/id_dsa.
andyj: this is my username for my domain which is hosted in that server.
How do i allow 'andyj' user to have permission to do this? Note, I can do this with 'root' just fine. I'm using CentOS 5.
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Oct 15, 2007
Just wondering if you guys had any resolutions to this. We are looking to save space on our rsync backups.
I know you can use the --compress, or -z and it compresses data on the fly to save bandwidth but is there anyway to keep the data compressed so it takes up less space once it is on the server and still make it so it only copies over the file changes?
If not, anyone have any suggestions on how to save space with rsync backups?
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Oct 12, 2009
Is there a way to use a Web browser to open a file at [url], make changes to the file and save it back on the Web site? I am trying to do this but have only been able to save the file locally. The file only opens in [Read Only] (Compatibility Mode).
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Aug 12, 2007
I have 5 servers that I login to everyday and its annoying typing pass and username and server IP on putty every time I want to login.
Is there client software that I can use to save Login so i can login using one click?
I currently use putty
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Oct 16, 2007
I have Cpanel VPS account, and have been regularly backing up all my outgoing emails (via SMTP, imap or webmail) with the following:
Added to following lines in /etc/antivirus.exim
Code:
if first_delivery
and ("$h_from:" contains "username@domain.com")
then
unseen deliver "backup@anotherdomain.com"
endif
So, this worked well for the longest time. At some point it 'disappeared' and stopped working which I guess was due to some update, and putting it back it got it working again.
Recently, I had a new vps, moved my domain there and dropped the same bit in, but this time around, it didn't work.
Is it possible that antivirus.exim isn't being parsed? How do I check? Or is there somewhere else I can stick it into so it'll always work and not get replaced by some cpanel update?
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Jul 27, 2009
do dual power supplies use more power than a single supply?
E.g. Say I have a server than uses two amps, powered by a single power supply. Now if I switch to a dual supply (and say each supply has the same efficiency rating as the single), does my server use more power? How much more?
My simple view of this is that it probably does, but maybe not much. The second power supply consumes some power itself, but since its not under load, it doesn't consume much. Therefore, my server with redundant supplies might use 2.1A or 2.2A.
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Apr 10, 2015
I want to change SOA Settings from defaults to these: When I press OK button shows that is saved but when I test with [URL] .... and [URL] .... shows that settings still is defaults.How to change these settings??
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Sep 28, 2008
I am trying to migrate a server to a new host.
When I try to restore a full backup on my new host, NONE of the home directory files are making the move. Everything else is fine though.
I'm not getting any errors, so I don't have a clue as to why this isn't working.
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May 19, 2008
We have a Windows 2003 Enterprise server with 6GB of RAM and about 20 terminal services users logging in. These users then launch a program called Accuthin Thin Client giving them access to a piece of software called Southware that runs on a Centos 5 Linux server on the same network.
Problem seems to be that saving files to the network share causes windows to blue screen and crash. Has anyone ever heard of this before? I know it is a shot in the dark but we have been investigating this issue for 4 months, have replaced the Windows server 5 times, increased RAM to 8 GB and installed Enterprise edition clean but the issue follow no matter what we do.
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Dec 16, 2007
Please give me the difference. Colo in carrier hotel, we can choose our preferred network provider, but should we do that if we cannot have our own tech in datacenter? How about the supporting service from carrier hotel? Just general question, cause I dont address exactly which facility.
And the second would be more expensive? Saying the same number of rack, amount of bandwidth... Who is providing IP addresses then?
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Dec 2, 2007
I just signed my agreement for 2 cabinets at Internap's Atlanta CoLo. For now, I will just have 1 120V 20A circuit in each cabinet.
At my office's server room we currently have 8 circuits I am powering my 2 racks from. I am just curious how many servers you can typically put on a 20A circuit. I am also considering adding two additional power feeds (1 more for each cabinet) to have truly redundant power for my dual power supplies.
I am hoping that 20A is plenty for my needs. I have around 20 HP and Dell systems. Mostly HP DL380s and Dell PE2950s.
Any ideas? I am splitting them in half, only filling up a half of each cabinet for now, as we are growing quickly and I wanted to overguy space so I would not be forced to add another cabinet later and have it end up somewhere else in the DC.
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Sep 10, 2009
I wonder if any colocation providers here have any tips for measuring power. Currently I'm using APC 7900 power strips with amperage meter. I'm not a power expert by any means but I want to be able to calculate whats the cost having a server drawing 2 amps 24/7 365 days week.
Our secondary site gave us a whopping power bill, and at our own data center we never considered charging our customers for power.
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Aug 10, 2009
I need to know what happens when a rack has capped its (lets say) 5A limit. I'm trying to calculate what exactly I can put into a rack and am considering that not all servers are going to be 100% load, as that would be bad performance anyway.
I guess it could do the following (but really don't know):
Cap performance of all servers
Cause system failures
Trip
The rack would have servers, a switch and perhaps a Remote Power Strip and Firewall. I don't know how they would be affected.
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Apr 8, 2008
how much power the average hard drive would use? (ie a 1tb drive). I was looking on WDC's website and it said 7.5 watts peak durring writing and reading etc, so assuming thats at 110 voltage, would it be safe to assume that 12 drives @ 7.5 watts each would make a total of .81 amps? I am going off of the equation that Amps = Watts/Volts. So amps = 90/110
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Jun 21, 2008
"Can i host a small forum at a 64mb ram vps with lighttpd and mysql? How many users can i have online?" I said that he can do that.Is this answer true?
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Feb 4, 2008
I've been doing research, and looking around on Google for a list of processors that use little power.
What are some of the processors out now a days that have minimal power usage?
Chassis will be SuperMicro's with 1-4 GB ram, if that's of any use.
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Jan 13, 2008
We are transitioning from an on-site data center to a collocation facility and are having problems negotiating the right amount of power, the type of connections, and the PDU power strips that we need.
For simplicity lets say that we are going to rent a 10 ft by 10 ft cage area. This should house 4-5 rack cabinets.
The amount of power we are given for this area varies with the lowest being 120 watts/sq. ft and the highest being 175 watts/sq. ft.
With 120 watts per square foot that comes out to about 6.25 circuits that are 20 amps for a 10x10 space.
For the initial setup we would have a Cisco 73xx Router, a HP 26xx switch, an Avocent IP KVM, an EMC CX3-10 SAN, and our Dell PowerEdge 2950 III servers (4).
Using the calculator at: dell.com/calc I show the power requirements for all of the Dell equipment to be:
C13 Power Cord Qty: 12
Amperage on C13 Cords: 26.49 amps
System Heat/Power: 2754.6 watts
Total Current: 13.24 amps
The way I was envisioning this was Rack 1: Router, Switching, KVM on a 20 amp circuit and Rack 2: Dell Equipment on a 30 amp circuit. Is that right?
Additionally, I'm confused about single phase vs. three phase power in the data center and what most people choose to implement. I've heard talk of getting redundant power in each cabinet but that seems like you limit yourself to half of your space doing it that way.
And the last thing is it's confusing about what type of PDU you need to put in your racks to make it all come together. All of our equipment should be using IEC C13 cords and we're thinking about going with Avocent for all of the KVM/PDU so we can centrally manage it.
It seems to me that if the cost is roughly the same we should be pressing as hard as possible for the highest watts/square foot since that seems to be one of the most important commodities in any data center.
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Feb 16, 2008
How much does a typical quad core Xeon eat, say an E5410 or a E7320? a 2GB RAM stick? A 500-750GB SATA disk? How much is the system overhead for a 1U unit? I tried to find data on this without too much success. For example Intel says the same number (80W) for an 1.6GHz CPU and a 2.4GHz one -- that does not sound too reliable to me.
If this is too abstract, then I would like to ask aobut the real world power consumption of two boxes. 1 E5410, 8GB of RAM, 2 SATA disk maybe 10K RPM. The other will have two E7320, 24-32GB of RAM and 3 10-15K disk.
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Nov 26, 2008
I have been interested in setting up my own server for hosting a website and a small online game I created. My only problem is how good of a server I would need to get.
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Jun 14, 2007
What the difference between high and low power on a PDU?
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May 4, 2007
how to figure out how much power one would need?
My potential colo provider is saying that a 5A circuit comes standard with a 1/4 cabinet and that they charge $20 per amp over that. I will have (6) Dell 1650's with dual 650W PSU's. Any idea how to calculate how much actual power I will need for this configuration?
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