Online Transaction Processing(OLTP)

OLTP (online transaction processing) is a class of program that facilitates and manages transaction-oriented applications, typically for data entry and retrieval transactions in a number of industries, including banking, airlines, mailorder, supermarkets, and manufacturers.

Today's online transaction processing increasingly requires support for transactions that span a network and may include more than one company. For this reason, new OLTP software uses client/server processing and brokering software that allows transactions to run on different computer platforms in a network

 

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Real-Time Operating System (RTOS)

A real-time operating system (RTOS) is an operating system that guarantees a certain capability within a specified time constraint.

In general, real-time operating systems are said to require:

Multitasking
Process threads that can be prioritized
A sufficient number of interrupt levels

Real-time operating systems are often required in small embedded operating systems that are packaged as part of microdevices. A real-time operating system is usually larger than just the kernel.

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Single Point of Failure (SPOF)

A single point of failure (SPOF) is a potential risk posed by a flaw in the design, implementation or configuration of a circuit or system in which one fault or malfunction causes an entire system to stop operating.

In a data center or other information technology (IT) environment, a single point of failure can compromise the availability of workloads – or the entire data center – depending on the location and interdependencies involved in the failure.

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Power usage effectiveness

Power usage effectiveness (PUE) is a measure of how efficiently a computer data center uses its power; specifically, how much of the power is actually used by the computing equipment (in contrast to cooling and other overhead).
PUE= Total facility power /IT equipment power

PUE is the ratio of total amount of power used by a computer data center facility to the power delivered to computing equipment.

PUE is the inverse of data center infrastructure efficiency (DCiE). An ideal PUE is 1.0.

 

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Data center infrastructure efficiency (DCIE)

Data center infrastructure efficiency (DCIE), is a performance improvement metric used to calculate the energy efficiency of a data center. DCIE is the percentage value derived, by dividing information technology equipment power by total facility power

 

 

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Power Distribution Unit (PDU)

A power distribution unit (PDU) is a device fitted with multiple outputs designed to distribute electric power, especially to racks of computers and networking equipment located within the data center.

 

 

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Uninterruptible Power Supply (UPS)

An uninterruptible power supply, also uninterruptible power source, UPS or battery/flywheel backup, is an electrical apparatus that provides emergency power to a load when the input power source, typically mains power, fails.

 

 

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Performance Per Watt

Performance per watt is a measure of the energy efficiency of a particular computer architecture or computer hardware. Literally, it measures the rate of computation that can be delivered by a computer for every watt of power consumed.

 

 

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FLOPS

FLoating-point Operations Per Second, also flop/s, see below) is a measure of computer performance, especially in fields of scientific calculations that make heavy use of floating-point calculations

 

 

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