Group of independent systems working together as a single system Clustering technology allows groups of servers to access a single disk array containing applications and data
a cross between parallel processing and distributed computing Networked computers, on a local level, work together just like a parallel machine Although the work is split across multiple computers, they behave in a parallel fashion The same hurdles for parallel processing still exist Mentioned in: DC Alternatives, Parallel Processing See also: parallel processing
Listing of one page from each website within a search engine or directory This avoids occupation of all the top results by a small number of web sites and makes the list of results clearer and more useful to the user
Definition: The process of listing a single page from a web site within a search engine or directory's search results This is a common practice in order to provide a wider variety of relevant results and is aimed to keep one company from occupying all of the top positions
A server architecture that emulates multiprocessing by interconnecting two or more individual computers in order to share the application processing load Microsoft's future clustering technology for Windows NT now carries the code name Wolfpack A number of third parties offer proprietary clustering hardware and software for Windows NT Server 4 0
Clustering algorithms find groups of items that are similar For example, clustering could be used by an insurance company to group customers according to income, age, types of policies purchased and prior claims experience It divides a data set so that records with similar content are in the same group, and groups are as different as possible from each other Since the categories are unspecified, this is sometimes referred to as unsupervised learning
Creating a mini-network of computers that function in a fault resilient manner If one computer fails, others in the cluster take up the additional load
1 A method of super-computing that involves connecting groups of computers to share in compute tasks and processes Synonymous to networked, pre-emptive multi-tasking Most commonly used in digital animation studios instead of massively parallel supercomputers 2 A method of sharing resources for fail-over Commonly applied to separate servers that share a drive tower or RAID The most prevalent, affordable, secure and powerful server clustering technology and platform today is still DEC VMS/OpenVMS, UNIX being still a very distant second
The practice of linking many small computers to do a big job Companies hope clusters of Linux computers will give them the power they want on the cheap
A closely grouped series of events or cases of a disease or other health-related phenomena with well-defined distribution patterns in relation to time or place or both The term is normally used to describe aggregation of relatively uncommon events or diseases, e g , plague, smallpox
- A technique in which two or more servers are interconnected and can access a common storage pool Clustering prevents the failure of a single file server from denying access to data and adds computing power to the network for large numbers of users
Connecting two or more computers together for the purpose of sharing resources and request load Each member computer of a cluster is called a node The nodes in a cluster may either have their own storage devices or share a common device Typically, clustering will involve support for load balancing, fault tolerance, and failover See also load balancing; node; fault tolerance; failover
The technique of grouping records together based on their locality and connectivity within the n-dimensional space This is an unsupervised learning technique
A type of multiprocessor or architecture in which there is a hierarchy of the units of replication At the lowest level, "processors" are replicated to form a "cluster" The cluster consists of M processors and a shared switching network that provides communication among the processors and access to a shared local memory At the next higher level, the clusters are replicated A clustered "system" consists of N clusters interconnected through a global network that allows communication among the clusters and access to a global memory that is shared among the cluster The purpose of clustering is to reduce conflicts in accessing shared resources, whether these resources are the communication network or the storage system