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

By Kailash Jayaswal

Achieve a pragmatic wisdom of information middle concepts

To create a well-designed information heart (including garage and community structure, VoIP implementation, and server consolidation) you need to comprehend various key thoughts and applied sciences. This booklet explains these elements in a fashion that smoothes the trail to implementation and administration. no matter if you wish an advent to the applied sciences, a refresher path for IT managers and knowledge heart team of workers, or an extra source for complicated examine, you'll locate those instructions and recommendations supply an outstanding beginning for construction trustworthy designs and safe facts middle policies.
* comprehend the typical reasons and excessive expenses of carrier outages
* how you can degree excessive availability and accomplish greatest levels
* layout a knowledge middle 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 while consolidating information heart resources
* extend your wisdom of most sensible practices and security
* Create a knowledge heart surroundings that's consumer- and manager-friendly
* find out how excessive availability, clustering, and catastrophe restoration recommendations will be deployed to guard severe information
* how one can use a unmarried community infrastructure for IP info, voice, and garage

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

Example text

Data volumes and files systems can be increased, decreased, or checked for problems while they are online. Applications can be upgraded while they are up. Some applications must be shut down before an upgrade or a configuration change. Outages for planned activities can be avoided by having standby devices or servers in place. Server clustering and redundant devices and links help reduce service outages during planned maintenance. If the application is running in a cluster, it can be switched to another server in the cluster.

These components are secondary in importance and not essential to the existence of the data center. However, most data centers have these. The requirements for the equipment are that it must be available all the time (that is, it must have almost 100 percent uptime). Most data centers have mission-critical servers and need 24 × 7 service uptime. The connection to the Internet must be redundant with two or more feeds from different ISPs. Also, network devices, sources of backup power (UPS or generators), and cooling units must have built-in redundancy.

Natural disasters occur mercurially all the time and adversely impact business operations. And, to add to all that, there are disasters caused by human beings, such as terrorist attacks. The best protection is to have one or more remote, mirrored disaster recovery (DR) sites. In the past, a fully redundant system at a remote DR site was an expensive and daunting proposition. Nowadays, conditions have changed to make it very affordable: ■■ Hardware costs and system sizes have fallen dramatically.

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