The modern companies, make service great demands very much of the high-critical applications.

Recently alongside with high quality of information services grantingthe important role is played with a continuity of their granting. Idle times of information systems, both planned, and not planned, threaten the companies with straight lines and indirect losses.

The increasing quantity of the applications used in the companies information system, receive the status "high-critical". It means, that functioning business of all company depends on continuous work of such appendix as a whole. Usually such applications is the software for planning resources of the enterprise, financial, nonproduction systems, systems of the information automated processing, system of electronic trade and many other things.

Failures in work of such applications are fraught with loss of the company work efficiency, trust of clients, incomes. Thus cost of idle times constantly grows.

For the decision of this problem there is the whole complex of measures named by decisions of a high degree of reliability for high availability. Below components of these systems are listed:

• Servers with special measures on increase of reliability;
• ON association of servers in highly reliable clusters;
• ON mirroring disks;
• Systems of high availability data storage;
• System technical support.

Also these products can be added by the following:

• Oracle 8, Oracle Parallel Server + means of fast restoration of a DB;
• ON HP Process Resource Manager for management of system resources;
• Means of reserve copying and sources of a uninterrupted feed.

All aforesaid in aggregate allows to construct an information infrastructure meeting needs practically any company, beginning from the average sizes and finishing large. Offered products enable to make the information environment of any company accessible to its employees, partners and clients during 99.999% of Server Up Time that gives as a result only 5 minutes of idle time in a year.

Data who support transactions of electronic trade, should be protected accordingly and to be accessible with the minimal idle time. These data should not only to be supported in regular intervals in the local data centers, but should be copied also to databases in the remote data center connected on the high-speed computer network. This remote center of data should be equipped by secondary servers, with readiness accessible, and is synchronized with primary servers. It gives business ability to switch to these servers under advice the moment with the minimal idle time instead of waiting within many hours, to restore servers and to return data.

Maintenance of the synchronized remote data centers - an example where redundancy is constructed on an infrastructure of all system. It can be dear. However, critical mission the nature of systems and data which it protects, can justify this charge.

While business, probably, requires powerful servers to execute search of data, it should not reflect these data concerning the basis in real time. Protection of noncritical data can be received, simply carrying out on a regular basis planned backup copies.

For business of electronic trade, manufacture commercial planning of the end and system of stock as expect, will have above HA requirements than systems of data search, and thus they can use technologies, type of local reflection or local pictures, in addition to the planned backup copies and backup offsite.

Business should use an infrastructure of management which carries out full management of systems, administration and the control, and provides the executive instrument panel. This infrastructure of management should be very accessible and failure-safe.

At last, full infrastructure IT for this business of electronic trade should be extremely safe, protect against ill-intentioned external network attacks.