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11-19-2009, 11:40 PM #1Web Hosting Master
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Rack Mount v/s Towers Major Factors
It is usually seen that COLO's provide racks space in terms of U's plus v/s most commercial Datacenter use tower server only. What are the major factors Considered to use Rack mount v/s Tower servers. Pro's & Cons
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11-19-2009, 11:51 PM #2Web Hosting Evangelist
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When using tower servers it is cheaper to procure a system; however it takes up a lot of floor space hence this is only ideal mostly for providers who own their facility and where space isn't an issue.
Rack mount servers take up less floor space which is great but it is a tad bit expensive to procure a system.Antony Mascarenhas How can I help? antony_m@zysek.com
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11-20-2009, 12:21 AM #3Aspiring Evangelist
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Rackmounts are smaller and usually are built with higher quality as your buying direct from a provider.
Tower servers can (but not always) built from any random computer part that works with the motherboard. There are tower servers built for datacenter usage but most people that do colocate a tower usually just use a normal desktop PC. (From what I've heard and seen).
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11-20-2009, 12:48 AM #4Junior Guru Wannabe
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11-20-2009, 01:52 AM #5Web Hosting Master
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I guess Towers are more power effiecient compared to rack mount
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11-20-2009, 06:20 AM #6Web Hosting Master
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Main differences I think are size and redundancy, you can fit loads of 1u's in the same space that would only take a few towers. and redundancy as 1u's commonly have hot swap parts like PSU and hard drives, not really something you see in a tower server. and cost... towers are cheap...
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11-20-2009, 08:01 AM #7Newbie
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tower hosting advantages:
- cheap hardware
- easy to equip with additional hardware
- flexibility
- easier shipping
- same or even less energy consumption
- good cooling possible
rack hosting advantages:
- usually smaller chassis / efficient space usage
- efficient cooling solutions
- can be mounted in all common racks
- brand name hardware in most cases
- optimized constructions for datacenters
I'd prefer the tower servers because the disadvantages don't weigh too heavy
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11-20-2009, 10:25 AM #8THE Web Hosting Master
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What is this based on? You can find power supplies just as efficient for a rackmount system as you can for a tower. Now, it is true that it is probably easier to find a power efficient power supply for a tower, as it is more standard, whereas with a 1u rackmount system you're dealing with a specialty power supply.
Simply put, most tower systems will generally allow you to build systems less expensively. This often then sacrifices space taken up, airflow efficiency, and proper rackmount organization. Now, if you properly engineer things, the later two of those aren't really an issue, then it just becomes floor space cost vs. server cost. You'll then see that a lot of providers with really low real estate costs, like many down in Texas, will favor towers, while ones with higher real estate costs, such as in NYC or downtown Chicago, will use rackmounts.
Personally, I just find rackmount systems easier to deal with. The Supermicro chassis already come with efficient and highly reliable power supplies, hot swap bays, etc. and are easy to work with and give ample flexibility. We can then use proper rackmounts, which in a dedicated server/colocation combined environment lets us standardize on cabinets, no bread racks, which helps in planning, air flow efficiency, and just makes things look better, imho. The extra money we spend on rackmounts is worth it, imho.
One thing people forget is that even though you're spending more money on a rackmount server, it will also have higher resale value when you're done with it. Most people expect servers to be rackmount, so the demand for tower based servers is lower. In addition, the chassis itself will largely retain it's value, since it could be resold at a later date to house other hardware. That then, in the end, makes them really no more costly.Karl Zimmerman - Founder & CEO of Steadfast
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11-20-2009, 10:58 AM #9Web Hosting Master
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Besides what Karl said, there is another embedded implication, the power density.
Excluding the low power Atoms that you can fit up to 80 of those babies in a single rack without breaching the maximum cooling allowed (as they would use about 4.4kW); being rackmount isn't really an advantage, as you can't full a rack with even 40x 1U servers as they will probably breach the maximum density that the datacenter allows (or is projected for). Average market numbers are around the 5kW/rack number.
With newer hardware, that density allows to host a bit more servers, I'd risk to say around 30x CoreDuos or 10-15x Dual Xeons (E5300 based calculation). Yet with old hardware, let's say, a HP DL145G1 or G2 with Dual Opteron 245s; it easily takes 10-12kW per rack on a rack with 40 of these babies.
Between having the monthly cost of a partially empty rack (of of paying more than one rack to compentate for having one full), and the initial cost of purchasing tower servers which are cheaper than rackmounts; it's just the case of preferences and aesthetic. And, if you are working with high power servers, then there would be so few of them rackmountable allowed on a rack (due to power consumption) that it simply does not matter if you go with them on tower or rackmount - on a 44U 19" rack you can fit 10x tower servers if well arranged.
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11-20-2009, 02:33 PM #10THE Web Hosting Master
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We routinely fill entire cabinets with 1u servers, and we separate the Atoms out into separate cabinets, which those have excess power. As long as you're using power efficient hardware, thus not Dells or primarily dual socket systems, filling a full cabinet with servers shouldn't be a huge problem in most facilities.
That does bring up one thought though, Rackmounts offer you much greater flexibility location/provider-wise. All facilities will take rackmount systems and all provide rackmount cabinets, etc. Not every facility will offer bread racks and/or may charge a premium for the space/shelves in cabinets.Karl Zimmerman - Founder & CEO of Steadfast
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11-20-2009, 04:27 PM #11Randy
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Tower servers are not conducive for hot/cold row setups.
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11-21-2009, 03:15 PM #12Web Hosting Master
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But are they efficient in cooling ?? I mean if u you use Tower does it lower cooling bills ??
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11-21-2009, 05:18 PM #13Newbie
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Tower servers are not conducive for hot/cold row setups.
But are they efficient in cooling ?? I mean if u you use Tower does it lower cooling bills ??
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11-21-2009, 06:47 PM #14Web Hosting Master
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For those of you using tower servers, do you use regular racks or baker racks? I was in a DC and they used regular racks but their rack rails were more of shelves. I really wish I could find some but I don't know what to search for.
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11-21-2009, 09:03 PM #15Web Hosting Master
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11-21-2009, 09:07 PM #16Junior Guru
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From what I can last remember is looking at an webcam from the Giga-Internation website. The webcam was showing the servers and all the servers there were Towers
So you probably go on there site and see the webcam to see how they place their servers
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11-21-2009, 09:14 PM #17Web Hosting Master
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yes i saw same on joe's datacenter too. From what it seems is that they are dell optiplex (towers).
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11-21-2009, 09:18 PM #18Junior Guru
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Ok is there any difference from the tower I have at home and the tower they use it data centres?
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11-21-2009, 09:22 PM #19Web Hosting Master
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11-21-2009, 09:26 PM #20Junior Guru
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11-21-2009, 10:39 PM #21Web Hosting Master
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11-21-2009, 11:34 PM #22Web Hosting Master
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Why would u think so ?? Datacenters have better everything to manage servers include alarms if something goes wrong, which residence does not have.
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11-21-2009, 11:38 PM #23Web Hosting Master
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11-22-2009, 12:50 AM #24Aspiring Evangelist
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We use a wide range of different hardware. We actually have more supermicro servers than anything else. The web cam that you were referring to showed a combination of both our internal dedicated and colo servers. We have done some changes and now separate the two facilities. From my own experience the failure rate of rack mount servers as compared to desktop servers is about the same. The difference is when a desktop unit fails its much easier to get a replacement part fast. Computers regardless of what form factor have one thing in common the number one thing to fail is the moving part. Hard drives, fans, ect. The power supplies and hard drives seem to be the things that go first. We really don't have a high number of cpus and motherboards go bad.
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11-22-2009, 12:57 AM #25Aspiring Evangelist
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Unless your doing a cluster or a high availability setup with load balancing I don't think you can truly guarantee 100% up time on the hardware. Most places when they give a up time statistic are referring to the network and power infrastructure. Now there is a big difference between the desktop unit sitting on the floor under your computer desk and the one sitting on a rack with ups power and monitored environmental controls hooked into a mix of different bandwidth providers. Most datacenters are built and maintained to have 100% up time or at least that's the goal. Most residential houses and internet service providers are not. Also most datacenters have staff there who are trained to deal with failure of equipment and have the parts and resources there needed to get the thing running again in the event of a failure.
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