Month: May 2016

Poor power quality and its impact on IT equipment

Electricity is to a data center as blood is to human body – both are lifelines of their respective systems. Electricity is the life force which makes a dead data center and its equipment live and functioning. Hence it is important that this life force is of pure quality if the performance of the components is to be continuous and without any possible chances of damage from the same electricity. Yet the power quality of the grid power supplied to a data center may not be always as intended. The power could be of poor quality and this could result in damage to the electrical and electronic equipment of the data center. We will learn more about this phenomenon to follow. What is Power Quality? How to you define the term quality in an intangible entity such as electricity. Well let me tell you that quality in case of electric power means that the power is supplied at the designated voltage, amplitude and frequency without much variation in any of its major parameters. Quality is important since the equipments are designed to work for a specific range of values such as voltage, current and so forth. Of course most equipment can withstand slight variations in these parameters but any substantial change could result in temporary or permanent damage to the equipment, which in turn would damage the data/information and...

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Monitoring, Management and Service Frameworks

Written by Jon Greaves Since the first computers entered server rooms, the need to monitor them has been well understood. Earliest forms of monitoring were as simple as status lights attached to each module showing if it was powered up or in a failed state. Today’s datacenter is still awash with lights, with the inside joke being that many of these are simply “randomly pleasing patterns” and in all honestly, providing very little use. In 1988, RFC1065 was released. Request for Comment (RFC), allowed like-minded individuals to band together and build standards. RFC’s – typically under the umbrella of organizations like the Internet Engineering Task Force (IETF), 1065 and two sister RFC’s – outline a protocol “Simple Network Management Protocol” (SNMP) and a data structure Management Information Base (MIB). SNMP was originally focused on network devices, but its value was soon realized covering all connected IT assets including servers. Today, SNMP has been through three major releases and is still a foundation for many monitoring solutions. At the highest-level, three forms of monitoring exist today: Reactive – a device (server, storage, network, etc.) sends a message to a console when something bad happens Proactive – the console asks the device if it is healthy Predictive – based on a number of values, the health of a device is inferred Each of the above has pros and cons. For example,...

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Introduction to Computers–The Basics

Many people believe that knowing how to use a computer, is one of the basic skills needed to succeed in the workplace. In order to use the computer it is necessary to understand how the computer works.   The Hardware Computer hardware is made up of the equipment used to make up you computer unit. These parts include your monitor, central processing unit (CPU), keyboard, mouse, printer, and modem. The computer is an electronic machine that performs the following four general operations: Input Storage Processing Output. Input The input hardware allows you to enter data into the computer. The primary devices used are the keyboard and mouse. Keyboard – The keyboard looks like the typewriter. A numeric keypad is located to the right of the keyboard. Numeric keys have the same placement as a 10-key calculator, which allow the operator to enter data rapidly. Mouse – The mouse is a device that allows you to control the movement of the insertion point on the screen. The operator places the palm of the hand over the mouse and moves it across a mouse pad, which provides traction for the rolling ball inside the device. Movement of the ball determines the location of the I beam on the computer screen. When the operator clicks the mouse the I beam becomes an insertion point which indicates the area you are working on...

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