A server farm or server cluster is a collection of computer servers - usually maintained by an organization to supply server functionality far beyond the capability of a single machine. Server farms often consist of thousands of computers which require a large amount of power to run and to keep cool. At the optimum performance level, a server farm has enormous costs associated with it, both financially and environmentally. Server farms often have backup servers, which can take over the function of primary servers in the event of a primary-server failure. Server farms are typically collocated with the network switches and/or routers which enable communication between the different parts of the cluster and the users of the cluster. Server farmers typically mount the computers, routers, power supplies, and related electronics on 19-inch racks in a server room or data center.

Applications

Server farms are commonly used for cluster computing. Many modern supercomputers comprise giant server farms of high-speed processors connected by either Gigabit Ethernet or custom interconnects such as Infiniband or Myrinet. Web hosting is a common use of a server farm; such a system is sometimes collectively referred to as a web farm. Other uses of server farms include scientific simulations (such as computational fluid dynamics) and the rendering of 3D computer generated imagery (also see render farm).

Primary may refer to:

Arts and culture

Computing

Mathematics

Politics

Science and mechanics

A primary election is an election that narrows the field of candidates before an election for office. Primary elections are one means by which a political party or a political alliance nominates candidates for an upcoming general election or by-election.

Primaries are common in the United States, where their origins are traced to the progressive movement to take the power of candidate nomination from party leaders to the people.

Other methods of selecting candidates include caucuses, conventions, and nomination meetings. Historically, Canadian political parties chose their candidates through nominating conventions held by constituency riding associations. Canadian party leaders are elected at leadership conventions, although some parties have abandoned this practice in favor of one member, one vote systems.

Types

General

Where primary elections are organized by parties, not the administration, two types of primaries can generally be distinguished:

Primary is a 1960 Direct Cinema documentary film about the 1960 Wisconsin Primary election between John F. Kennedy and Hubert Humphrey for the United States Democratic Party nomination for President of the United States.

Produced by Robert Drew, shot by Richard Leacock and Albert Maysles, and edited by D. A. Pennebaker, the film was a breakthrough in documentary film style. Most importantly, through the use of mobile cameras and lighter sound equipment, the filmmakers were able to follow the candidates as they wound their way through cheering crowds, cram with them into crowded hotel rooms, and to hover around their faces as they awaited polling results. This resulted in a greater intimacy than was possible with the older, more classical techniques of documentary filmmaking; and it established what has since become the standard style of video reporting.

In 1990, this film was selected for preservation in the United States National Film Registry by the Library of Congress as being "culturally, historically, or aesthetically significant". The film's importance in the evolution of documentary filmmaking was explored in the film Cinéma Vérité: Defining the Moment.