Monday, November 14, 2011

What is server consolidation?

Server consolidation is an approach to the efficient usage of computer server resources in order to reduce the total number of servers or server locations that an organization requires. The practice developed in response to the problem of server sprawl, a situation in which multiple, under-utilized servers take up more space and consume more resources than can be justified by their workload.
According to Tony Iams, Senior Analyst at D.H.

Brown Associates Inc. in Port Chester, NY, servers in many companies typically run at 15-20% of their capacity, which may not be a sustainable ratio in the current economic environment. Businesses are increasingly turning to server consolidation as one means of cutting unnecessary costs and maximizing return on investment (ROI) in the data center. Of 518 respondents in a Gartner Group research study, six percent had conducted a server consolidation project, 61% were currently conducting one, and 28% were planning to do so in the immediate future.


Although consolidation can substantially increase the efficient use of server resources, it may also result in complex configurations of data, applications, and servers that can be confusing for the average user to contend with. To alleviate this problem, server virtualization may be used to mask the details of server resources from users while optimizing resource sharing. Another approach to server consolidation is the use of blade servers to maximize the efficient use of space.

Server consolidation is the management of the total computer server complement to eliminate multiple, individual servers and maximize available resources by loading several different applications on the same server. Database architects or system managers typically complete this function or role. A server is a computer dedicated to the management of data or software applications. It typically has a basic operating system and the rest of the space is used to support multiple users accessing the same software simultaneously.
There are four things to consider when looking at server consolidation: hardware, redundancy, operating system, and maximizing efficiency. The purpose of server consolidation is to decrease the number of individual servers and maximize available resources. Make an inventory list of all your servers, operating system, software installed, versions and their primary function and user group. If possible, review the total traffic load, peak times and overall user demand.
These items all help to make the best decision when moving toward server consolidation. Review the age of the existing servers and determine if new hardware is needed. The vast majority of server consolidation exercises do not require the purchase of new hardware. Instead, the system managers simply combine the existing units together to make them more efficient.
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