what is cluster?

Answer 1

Go here...{:-{}.

Answer 2

A cluster is a basically just what it's name indicates a cluster. It's a cluster of files that don't really seem to be organized together correctly. If your asking this question because you have ran defragment on your computer and looked at the report and noticed you had like 8 clusters all that means is you had music file strings mixed with photo file strings or some other misconfigurations in the way your files stored themselves when you downloaded things onto your computer. If you do not defrag your computer but once ever six months you will notice higher cluster volumes. The more you download the more cluttered your files will become and the more Clusters you will create. Defragging your computer once a month at the very least will keep things where they belong. I do this once a week myself.
Hope that answers your question

Answer 3

A cluster is a group of computers that are linked by a fast network.
Clustering is done to increase availability. It is more fail proof than
a single computer. Clustering is also done to increase the power
beyond that which can be had with a single good computer.

Answer 4

Electronic slave labor.

1 machine designated as the host, sends out workload to all the other computers in the cluster.

Potentially the worlds largest cluster is Google. They have hundreds of thousands of machines tied together all perform search, archiving, retrival, and other functions.

Clusters have the advantage as they can be very dynamic, if you build a small 100 computer cluster, you can probably support a million visitor website. if you build a 1000 computer cluster you could possibly render a high definition video in a reasonable amount of time.

>>> http://news.com.com/2100-1001-983898.html >>>>
Pixar Animation Studios, which brought the world "Monsters Inc." and "Toy Story," is switching from Sun Microsystems to Intel, as the melodrama in the server market heats up.

The Emeryville, Calif.-based film studio is replacing servers from Sun in its "render farm"--a bank of servers that fuses artists' images into finished film frames--with eight new blade servers from RackSaver. In all, the blade system contains 1,024 Intel 2.8GHz Xeon processors, and it runs the open-source Linux operating system.
<<<<<<<<<

Here is a photo of there systems:
http://www.flickr.com/photos/thetwilitekid/85940484/

if you built a 10,000 computer cluster someone is going to come knocking at your door about your power bill.

Answer 5

The exact definition of a cluster computer will depend a little on who you ask. However, there are some general characteristics that most will agree upon.

Consists of many of the same or similar type of machines
(Heterogenous clusters are a subtype, still mostly experimental)
Tightly-coupled using dedicated network connections
All machines share resources such as a common home directory
(NFS can be a problem in very large clusters, so binaries and data must be pushed to scratch on each node.)
They must trust each other so that rsh or ssh does not require a password,
otherwise you would need to do a manual start on each machine.
Must have software such as an MPI implementation installed to allow programs to be run across all nodes
Building a simple cluster

Let's walk through the process of building a simple 4-node cluster out of some existing workstations, assuming that they are nearly identical and located in the same room.

The first step is to tightly couple them together. The typical workstation is probably connected to the network through an Ethernet connection to a hub or switch in the room. The minimum configuration that I would recommend is to use Gigabit Ethernet. This is fairly cheap, at around $100/machine, and provides enough bandwidth to run many applications.

If the computers are not connected this way, you will need to install a Gigabit Ethernet card in each (~$40/machine), connect them to a central Gigabit Ethernet switch ($1600 for a 24-port switch), and configure the interfaces properly. This second interface will be configured as a local network, so use IP addresses like 10.0.0.0 through 10.0.0.3. This requires root access, and differs greatly between operating systems. It is common to edit the /etc/hosts file so that these second interfaces have simple names like node0 through node3.

Now that the hardware is in place, the system may need to be adapted. If there is no common home directory across the nodes, you will need to set one up. This again will require root access, and may differ between operating systems. Basically, create a directory such as /cluster on each machine. Choose one machine to be the master node, and export this subdirectory to the others using the /etc/exports file. On the other nodes, mount the /cluster subdirectory using the /etc/fstab file.

All machines must trust each other enough to allow users to rsh/ssh between them without requiring a password. To test this, simply try 'rsh node1' for example, and you should log into node1 without being prompted for a password. If not, use man rsh or man ssh to determine the next course of action. You may just need to create a .rhosts file, or the appropriate ssh keys. If your machines are not set up to trust each other, you will need to convince the system administrator to change this.

Answer 6

Group of stars in the sky is called as cluster...

Answer 7

A "cluster" is a group or bunch of objects.
like a cluster of stars, a bunch of grapes. etc.

Answer 8

a cluster is a freshly cutted met

Answer 9

If you're referring to clustering servers, it's where two or more servers all share the inbound traffic or processing load, acting as one computer.

Answer 10

it means that it is a mess, trash, or stuff that is not useful that is taking up space.

Answer 11

http://www.google.com/search?num=100&hl=en&lr=&rls=GGGL,GGGL:2006-46,GGGL:en&defl=en&q=define:cluster&sa=X&oi=glossary_definition&ct=title