Temperature Fluctuations In Datacenter
Jun 26, 2007
I have been loosely monitoring the system temperature on my co-located 1U server and have noticed fluctuations of up to 9 degrees Celsius (or around 18 degrees Fahrenheit) depending on the time of day, and the current weather in the city the data center is located.
In the dead of night the system usually reads around 28C but in mid afternoon it will get up to 34 - 38C, not terribly hot, but the effect of the constantly changing temps on the hard drives has me concerned. Server load doesn't seem to be a huge contributor to the temp increase since it's peak load times are usually from late evening until early morning, so I'm guessing this is the data center heating up and cooling down following the outside weather patterns.
do any of you others see temperature swings like this on your servers and how much would be normal?
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Oct 1, 2008
Is there a command I can issue using Putty, and logged in as root or admin, to see what temperature my server cpu is running at.
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Sep 22, 2008
if there is a command to check the CPU temperature. Is the following the right way?
cat /proc/acpi/thermal_zone/THRM/temperature always gives 30 C.
I recently got a Intel Quad Core with 8 GB RAM. When the load is nearing 1.00, the kernel flashes the message below. It is always CPU1 and CPU2 while CPU3 and CPU0 is reported to be normal.
====================================================
Sep 22 00:07:47 server2 kernel: CPU2: Temperature above threshold, cpu clock throttled
Sep 22 00:07:47 server2 kernel: CPU3: Temperature/speed normal
Sep 22 00:07:49 server2 kernel: CPU1: Temperature above threshold, cpu clock throttled
Sep 22 00:07:49 server2 kernel: CPU0: Temperature/speed normal
=====================================================
and /proc/acpi/thermal_zone/THRM/* always gives the following
====================================
<setting not supported>
cooling mode: critical
<polling disabled>
state: ok
temperature: 30 C
critical (S5): 110 C
====================================
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Jul 30, 2008
how to read CPU Temperature on CentOS 4.6. and kernel 2.6.9 (CentOS kernel from yum)
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Apr 20, 2008
what are the 'standards' for server temperatures.
We are testing some new DELL servers, and we're hitting 65 - 70degrees Celcius, was wondering if anyone experiences these temperatures.
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Jul 26, 2007
We have a very small server/network/telecommunications room with one server rack housing 2 racked Dell servers, 2 3com router, 1 switch, 2 UPSes and 2 tower servers.
In addition, our phone system is housed in this room.
The temperature is normally about 77 degrees Fahrenheit. It is a VERY small room and central air does not reach the room. Their is only a portable A/C(I guess its fairly powerful) that we leave on all night and day at its max. However, the temperature stays about a constant 77 degrees.
I read in some articles that the temp should be about 58 degrees Fahrenheit. Is that true?
Is our equipment being damaged by the temperature in the room?
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Jun 21, 2007
Is this behavior normal when running a utility such as bonnie++?
I'm running bonnie++ to check for the performance of my drive. When it gets to the part of Writing with putc()... the syslog starts to pop the message in the screen saying:
Message from syslogd@machine at Wed Jun 20 18:06:41 2007 ...
machine kernel: CPU0: Temperature/speed normal
I'm using the following OS:
OS CentOS 5
This is the uname information:
Linux machine.domain.com 2.6.18-8.el5 #1 SMP Thu Mar 15 19:46:53 EDT 2007 x86_64 x86_64 x86_64 GNU/Linux
This is the output of bonnie++
[root@machine ~]# bonnie++ -x 3 -u 0 -n1
Using uid:0, gid:0.
name,file_size,putc,putc_cpu,put_block,put_block_cpu,rewrite,rewrite_cpu,getc,getc_cpu,get_block,get_block_cpu,seeks,seeks_cpu,num_files,seq_create,se q_create_cpu,seq_stat,seq_stat_cpu,seq_del,seq_del_cpu,ran_create,ran_create_cpu,ran_stat,ran_stat_cpu,ran_del,ran_del_cpu
Writing with putc()...done
Writing intelligently...done
Rewriting...done
Reading with getc()...done
Reading intelligently...done
start 'em...done...done...done...
Create files in sequential order...done.
Stat files in sequential order...done.
Delete files in sequential order...done.
Create files in random order...done.
Stat files in random order...done.
Delete files in random order...done.
bigblue.diversityjobs.com,8G,63756,90,96753,25,43654,9,66384,94,104946,10,292.7,0,1,+++++,+++,+++++,+++,+++++,+++,+++++,+++,+++++,+++,+++++,+++
Writing with putc()...
Message from syslogd@bigblue at Wed Jun 20 18:06:41 2007 ...
bigblue kernel: CPU0: Temperature/speed normal
done
Message from syslogd@machine at Wed Jun 20 18:06:43 2007 ...
bigblue kernel: CPU1: Temperature above threshold, cpu clock throttled
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Feb 17, 2007
Mountain View (CA) - As a company with one of the world's largest IT infrastructures, Google has an opportunity to do more than just search the Internet. From time to time, the company publishes the results of internal research. The most recent project one is sure to spark interest in exploring how and under what circumstances hard drives work - or not.
There is a rule of thumb for replacing hard drives, which taught customers to move data from one drive to another at least every five years. But especially the mechanical nature of hard drives makes these mass storage devices prone to error and some drives may fail and die long before that five-year-mark is reached. Traditionally, extreme environmental conditions are cited as the main reasons for hard drive failure, extreme temperatures and excessive activity being the most prominent ones.
A Google study presented at the currently held Conference on File and Storage Technologies questions these traditional failure explanations and concludes that there are many more factors impacting the life expectancy of a hard drive and that failure predictions are much more complex than previously thought. What makes this study interesting is the fact that Google's server infrastructure is estimated to exceed a number of 450,000 fairly mainstream systems that, in a large number, use consumer-grade devices with capacities ranging from 80 to 400 GB in capacity. According to the company, the project covered "more than 100,000" drives that were put into production in or after 2001. The drives ran at a platter rotation speed of 5400 and 7200 rpm, came from "many of the largest disk drive manufacturers and from at least nine different models."
Google said that it is collecting "vital information" about all of its systems every few minutes and stores the data for further analysis. For example, this information includes environmental factors (such as temperatures), activity levels and SMART parameters (Self-Monitoring Analysis and Reporting Technology) that are commonly considered to be good indicators to describe the health of disk drives.
In general, Google's hard drive population saw a failure rate that was increasing with the age of the drive. Within the group of hard drives up to one year old, 1.7% of the devices had to be replaced due to failure. The rate jumps to 8% in year 2 and 8.6% in year 3. The failure rate levels out thereafter, but Google believes that the reliability of drives older than 4 years is influenced more by "the particular models in that vintage than by disk drive aging effects."
Breaking out different levels of utilization, the Google study shows an interesting result. Only drives with an age of six months or younger show a decidedly higher probability of failure when put into a high activity environment. Once the drive survives its first months, the probability of failure due to high usage decreases in year 1, 2, 3 and 4 - and increases significantly in year 5. Google's temperature research found an equally surprising result: "Failures do not increase when the average temperature increases. In fact, there is a clear trend showing that lower temperatures are associated with higher failure rates. Only at very high temperatures is there a slight reversal of this trend," the authors of the study found.
In contrast the company discovered that certain SMART parameters apparently do have an effect drive failures. For example, drives typically scan the disk surface in the background and report errors as they discover them. Significant scan errors can hint to surface errors and Google reports that fewer than 2% of its drives show scan errors. However, drives with scan errors turned out to be ten times more likely to fail than drives without scan errors. About 70% of Google's drives with scan errors survived the first eight months after the first scan error was reported.
Similarly, reallocation counts, a number that results from the remapping of faulty sectors to a new physical sector, can have a dramatic impact on a hard drive's life: Google said that drives with one or more reallocations fail more often than those with none. The observed average impact on the average fail rate came in at a factor of 3-6, while about 85% of the drives survive past eight months after the first reallocation.
Google discovered similar effects on hard drives in other SMART categories, but them bottom line revealed that 56% of all failed drives had no count in either one of these categories - which means that more than half of all failed drives were put out of operation by factors other than scan errors, reallocation count, offline reallocation and probational counts.
In the end, Google's research does not solve the problem of predicting when hard drives are likely to fail. However, it shows that temperature and high usage alone are not responsible for failures by default. Also, the researcher pointed towards a trend they call "infant mortality phase" - a time frame early in a hard drive's life that shows increased probabilities of failure under certain circumstances. The report lacks a clear cut conclusion, but the authors indicate that there is no promising approach at this time than can predict failures of hard drives: "Powerful predictive models need to make use of signals beyond those provided by SMART."
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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?
[url]
Am I mistaken?
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Jul 20, 2007
Burstnet
Dednow/Beachcomber
FDCServers
Softlayer
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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Aug 7, 2009
I'm looking around for a nice, cheap colo place for a Dell PE 2650 I just purchased...
Requirements
* 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.
Prospects
* 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.
Conclusion
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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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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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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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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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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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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Apr 15, 2008
Anyone know which providers have san jose datacenters?
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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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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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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. I’ve 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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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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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 Netdirekt.de, 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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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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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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Nov 27, 2008
Is there a great webhost with their datacenter in California?
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Sep 26, 2008
Does anbybody has any experience with WorldStream datacenter?
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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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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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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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