Showing posts with label what is. Show all posts
Showing posts with label what is. Show all posts

Sunday, January 20, 2013

What is Bandwidth pooling ?

Bandwidth pooling

Bandwidth pooling is used in network switches to optimize the use of network resources. It allows switch processing cards to be shared by physical interface cards. This innovation frees switch resources that would otherwise be stranded when lower-rate interface cards are deployed in an aggregation switch.

Bandwidth Pooling in Dedicated Hosting: This is a key mechanism for hosting buyers to determine which provider is offering the right pricing mechanism of bandwidth pricing. Most Dedicated Hosting providers bundle bandwidth pricing along with the monthly charge for the dedicated server. Let us illustrate this with the help of an example. An average $100 server from any of the common dedicated bandwidth providers would carry 2 TB of bandwidth. Suppose you purchased 10 servers then you would have the ability to consume 2 TB of bandwidth per server. However, let us assume that given your application architecture only 2 of these 10 servers are really web facing while the rest are used for storage, search, database or other internal functions then the provider that allows bandwidth pooling would let you consume overall 20 TB of bandwidth as incoming or outbound or both depending on their policy. The provider that does not offer bandwidth pooling would just let you use 2 TB of bandwidth and the rest of the 18 TB of bandwidth would be practically unusable.

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Friday, January 11, 2013

Cruise control


Speed control with a centrifugal governor was used in automobiles as early as the 1910s, notably byPeerless. Peerless advertised that their system would "maintain speed whether up hill or down". The technology was invented by James Watt and Matthew Boulton in 1788 to control steam engines. The governor adjusts the throttle position as the speed of the engine changes with different loads.

Modern cruise control (also known as a speedostat) was invented in 1945 by the blind inventor and mechanical engineer Ralph Teetor. His idea was born out of the frustration of riding in a car driven by his lawyer, who kept speeding up and slowing down as he talked. The first car with Teetor's system was the 1958 Imperial (called "Auto-pilot")[1]. This system calculated ground speed based on driveshaft rotations and used a solenoid to vary throttle position as needed.

A 1955 U.S. Patent for a "Constant Speed Regulator" was filed in 1950 by M-Sgt Frank J. Riley.[2] He installed his invention, which he conceived while driving on the Pennsylvania Turnpike, on his own car in 1948.[3] Despite this patent, the inventor, Riley, and the subsequent patent holders were not able to collect royalties for any of the inventions using cruise control.

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