Computer Cases & Towers

Servers: Racks, Blades and Towers

 

Unlike tower servers, offices that use rack servers which traditionally come in 1U, 2U, 3U, 4U or 6U are installed in racks. The numbers that give names to the rack mounted servers precisely indicate the number of Us they occupy in the racks. The 1U server occupy a single 1U bay, the 2U occupy two and the 4U occupy four, while a rack of standard size has up to 42U:

 

The servers in 1U format are preferred by companies for use in hosting and data, because they are very compact (only 4.4 cm high), which lets you install a large number of servers per rack. The main limitations of this format is the limitations with regard to ventilation (due to the small inner space), impeding the use of processors with high energy consumption and the need to use coolers and special fans, which all run at an extra cost. Besides the basic components, spare space in general to install 2 or 4 hard drives of 3.5 "(according to the provision of other components) and a single expansion card, installed horizontally, with the help of a Riser.

 

Then there are the 2U servers. They use “normal” power sources and coolers and therefore end up being a little cheaper. The bigger internal space makes the format more suitable for 2U servers with two or more processors, or processors that use high consumption. The height is not enough to install expansion cards upright, as in tower servers, but you can use a Riser (as in the case of 1U), or use half-height cards (the lower plates, which have half the height of normal plates).

 

Finally, we have the biggest servers, which use 3U or 4U. There are 6U servers, but they are rare: this format is typically used by the disk arrays and chassis for blade servers (see the topic below). Using a 3U server or larger completely eliminates the problems with space, allowing the expansion cards to be fit in vertically and a large number of removable hard drives installed in bays, but causes the server to occupy more space in the rack, which increases the cost to the host of the datacenter, where you would pay an extra fee per pen used.

 

Another format that is becoming increasingly popular are the blade servers (blade comes from the word "blade", indicating the small format), an ingenious idea to further increase the density of servers and allow the sharing of common components in the datacenter, as power supplies and optical disks.

 

The idea is that instead of having 10 1U servers, with 10 sources (or 20, if sources were used redundant), 20 network cables (each server typically uses two cables, one for the network and another for management or redundancy), as well as power cables, cables used by KVM and so on, you can use a single Chassis, with an equivalent number of blade servers.

 

Each blade is a complete server with its independent processor, memory, network card and disks. Its small size, the blade servers typically use low-power processors and hard drives of 2.5”. At the beginning, it was the common use of processors from Transmeta and VIA, but they ended up being almost completely replaced by Intel & AMD multiple cores processors which are much faster, but still relatively economics. In the case of hard drives, the disks of 2.5 "are favorites for providing lower access times (but lose with respect to transfer rate), in addition to electric consumption.

 

Thought not all blade system are created equally. Therefore if you are planning to jump into the blade campaign you should find the best fit blade system for your case. Check out the below comparisons which will help you compare between the best of them:

 

HP Blade system vs IBM Blade System

 

HP Blade System vs Dell Blade System

 

About the Author

Julie Cole member of http://www.itcomparison.com as well write for http://www.virtualizationteam.com

Excel With The Benefits Of Online Video Learning

Online video learning as a means to improve one’s career dawns two kinds of people. The first ones are those who see themselves getting to the next position in a company where they plan to stay for the longest time. However, lack of time restrains them.

The following group is comprised of those pushed to have a career shift. Besides lack of time, they have insufficient funds to take another course or additional university degree.

This type of learning has its advantages and its drawbacks. However, having a positive outlook on it particularly that it is not only for the IT knowledgeable or those who are offering SEO services, can encourage everyone considering it.

Its topmost noticeable advantage is the flexibility of the study time. You can set it any time your schedule allows. This practice can even urge you to be more motivated and resourceful on how you spend your valuable hours each day.

Adults who have already started a family always make a difficult decision when faced with the fact of how they are going to spend their time. Work usually takes the majority of their daytime hours. That leaves only a few hours each day that could be dedicated for learning a new course.

Granted that they have been blessed with free time, the next thing they would need to decide on is searching for the courses offered in places close to home as traveling time could be another issue. Resorting to online video learning can save them from both of these.

With this, the toughest decision you will make would only be choosing the most credible provider of the web video training online course that suits your business or career advancement. Let us say you have set your late hours after bedtime to be your study time. If you are an early riser you might set it before breakfast time. Whichever is the most convenient time for you, online learning can serve its purpose in relation with your learning needs.

The latest developments in the area of information and technology have made use of this beyond the stereotypes system of classrooms. The employment of training videos online has covered different learning needs. They vary from the typical learning videos on school subjects, to training videos for employees, to self-help videos, and to business or career building videos.

Innovations today have allowed interactive learning videos available for the learning of the young and old. Besides saving their user’s precious time, they too allow cuts on expenses such as fare and food budgets needed when attending a live class or training. Moreover, it also saves anyone from unforeseen expenses that could be brought about by a need for retraining or retaking a class.

Sometimes a learner might find a particular lesson difficult to understand. With online learning, he can take things at his own pace. He can take it slowly at the parts he wants to spend more time on and pick up some speed on the parts that may be easy for them.

The importance of a learning video does not stop at the moment it has served its purpose to an individual. It remains important as long as the lesson it provides remains relevant. Let us say your purchased video which delves on business or career advancement. After you and/or your first batch of employees have finished it, your future employees can still be trained with it.

Besides its obvious benefits, online video learning In conclusion, online video learning aims at building up its learners’ professional and technical skills. The sole disadvantage it has is the absence of a live teacher or trainer who can provide immediate responses to the queries a learner might have for a particular lesson.is expected to hone the professional and technical skills of all its users. The only shortcoming it holds is the lack of personal interaction between the trainee and the trainer. Although most videos are easy to understand, there are learners who ask even the simplest and rhetorical questions. Unfortunately, their trainers on the video cannot give them instant answers for that matter.

To the Early Risers of the New Day: what role shall you play in the ultimate elevation of human consciousness?

Shall you act as a catalyst to usher in a golden age of reason and understanding?
It seems that our kind is at a crossroad and its future hangs by a thread.
Is there any knowlege that can stay our hand and keep the thread in tact?
Have we repeated the mistakes of our ancestors?
They were not spared the consequences of their actions...
Will we be?
What to do...what to do...?

Tell me of the Awakening...

"No eternal reward will forgive us now for wasting the dawn"- on sleep, that is. Morrison's silly words have more meaning than he meant them to have, kinda like drip painting.

The last age of enlightenment humanity had was in the fifties and sixties, I think. These times seem to be marked by an underlying belief in acting for the communal good and the forsaking of religious dogma- religion altogether (in favor of spirituality).
Before that was back in the late Victorian times when the artists made their great stand and ended up atop the world for a time. Kinda funny how what the artist in the late 1800's started with Delacroix, Monet.. ended in the fifties and sixties with Rothco, Pollock, and finally men like Warhol (in the time of Jim Morrision, lol.) To paraphrase H.S Thompson: if you stand on the right hilltop overlooking the streets of Manhattan or Paris, you can still see the high water mark where the wave finally broke- and fell back.
But did they pass on the torch, or did they all just fade into yuppies and oblivion? It has been almost another fifty years and it seems due time for another resurge- but where are OUR leaders, where are the peaceful, forceful, revolutionaries who will rip the terrified from the terroists and start real change (and I don't mean B.S politician change)?
We're now in a dark age of greed and fear. Those who would follow are under sway of the gangsters in charge who give them protection in return for allegiance.

I don't know but I think its just the way of reality for humanity to go through these cycles. Ups and downs, births and deaths...its the way of things. Its not for us so much to change others or the world as it is for us to change ourselves within.
Get up early, sit on the hill and watch the sun rise, linger in the evening and absorb the stars. Hear the wind in the trees and see the light of the moon.
Smile. Live. Be here and nowhere else.
Give up hope, give up fear; live in harmony with yourself and you'll help tune the world.

Old LMRP cap cut from riser; spare caps nearby - July 11