Administering Data Centers: Servers, Storage, and Voice over by Kailash Jayaswal

By Kailash Jayaswal

Achieve a realistic wisdom of knowledge heart concepts

To create a well-designed info middle (including garage and community structure, VoIP implementation, and server consolidation) you need to comprehend a number of key recommendations and applied sciences. This publication explains these components in a fashion that smoothes the trail to implementation and administration. even if you wish an creation to the applied sciences, a refresher path for IT managers and knowledge heart team of workers, or an extra source for complex research, you'll locate those instructions and strategies offer a fantastic origin for development trustworthy designs and safe info heart policies.
* comprehend the typical explanations and excessive bills of carrier outages
* how one can degree excessive availability and accomplish greatest levels
* layout an information heart utilizing optimal actual, environmental, and technological elements
* discover a modular layout for cabling, issues of Distribution, and WAN connections from ISPs
* See what needs to be thought of whilst consolidating information middle resources
* extend your wisdom of most sensible practices and security
* Create an information heart setting that's person- and manager-friendly
* learn the way excessive availability, clustering, and catastrophe restoration strategies may be deployed to guard severe information
* tips to use a unmarried community infrastructure for IP information, voice, and garage

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Additional resources for Administering Data Centers: Servers, Storage, and Voice over IP

Example text

Another problem is that cluster members located in the same general 21 22 Chapter 2 vicinity are affected by a local disaster, potentially damaging all nodes of the cluster. To protect against such mishaps, you must plan for disaster recovery. Level 5: Disaster Recovery Many organizations may find the cost of building and maintaining an off-site facility with duplicate hardware and software highly prohibitive. Various companies such as IBM’s Business Recovery Services, Sungard, and Comdisco provide third-party backup facilities at prices that are affordable because the cost of maintaining the site is shared by several companies that subscribe to the service.

The rapidly increasing demand for placing more and more data online and the constantly decreasing price of storage media have resulted in an increase of huge amounts of critical information being placed online. Employees and partners depend on data being available at all times. Work hours have extended beyond the traditional 9-to-5, five days a week. Intranet servers such as e-mail, internal applications, and so forth, must be always up and functional for work to continue. Every company has at least one businesscritical server that supports the organization’s day-to-day operation and health.

While it does increase overall system MTBF, the component failure rate is increased because of several, similar components. ■■ Mean time to repair (MTTR) — MTTR is the average length of time required to complete a repair action. ■■ Availability — This could be calculated as follows: Availability = MTBF/( MTBF + MTTR) As you can derive from this simple equation, the secret to high availability is using very reliable components (high MTBF) or designing components and systems that can recover from failures rapidly, can be quickly serviced preferably without having to take the application offline, or can be changed by hot-swapping (very low MTTR).

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