In modern conditions of economic the enterprise information system became an integral part of business. Practically always non-failure operation of information system crucial for successful functioning the enterprise. The special urgency was received with a problem of crucial data preservation in case of emergencies occurrence. We are inclined to carry terrorist attacks and acts of nature to such situations (flooding, fires, etc.).

Thus the enhanced attention is given, not only a problem in preservation of data, but also a problem on maintenance of trouble-free work of the enterprise basic information services. It is especially actual for the enterprises of electronic commerce and trade sphere. In this case besides indirect financial losses the enterprise sustains direct losses in the form of not received profit.

Now at construction of information systems the scheme providing construction of a uniform data-processing centre is widely used. In a basis of that decision consolidation of the enterprise computing resources that promotes essential simplification of information system architecture and increase of controllability IT-resources lays. Thus risks connected with full or partial loss of working capacity of information system because of nature acts, fires, failures on networks wather and power supply, and as failures in networks of data transmission increase. Creation Reserve Data Center reduces this risk level to a minimum.

Creation such data center will allow to provide availability of necessary services and fast restoration of information system functionality of the enterprise in case of the basic Data-processing centre failure.

Creation Reserved Data Centers will allow to minimize the risks connected with:

• Idle time of system, financial losses and possible penal sanctions;
• Inopportuneness of granting of reports and information in supervising bodies;
• Time inaccessibility of a part of services to Customers and Partners;
• Decrease in quality and a level of given services;

The reserve Data-processing centre allows to solve these problems due to:

• Introductions of the modern decision on the basis of the equipment of leading world manufacturers possessing significant opportunities on scalability;
• Uses failure-safe cluster technologies;
• Creations and maintenance in an actual condition reserved spears of basises for Data of the enterprise;
• Duplications of the basic liaison channels;
• Maintenance of automatic switching users for work with Reserve Data Centers information infrastructure at occurrence of an emergency with the basic data-processing centre.

As a rule, the reserve data center is on significant removal from the core data center. As it has independent power supply and data links. It allows to guarantee its availability to users in case of, for example, fire or failure of municipal services in a building of the core data center.

One of the basic criteria at a choice of a place for accommodation Reserve Data Center is the opportunity of the organization of a high-speed liaison channel up to the basic data-processing centre. Presence of the given liaison channel is necessary for creation of backup copies of basises for data of the enterprise and maintenance of automatic switching of users for work with a reserve data-processing centre.

Multilevel and, including, geographically removed reservation of data provides a maximum level of reliability of the information storage. "Hot" synchronization of the basic and reserve storehouses of data allows to restore operatively work of information system in case of failure in work of the basic data center. The problem of working capacity date of the center (and your business) thus is solved at local accidents or terrorist attacks.