Community Research and Development Information Service - CORDIS

Integrated Management Information System (IMIS)

IMIS solves the problem of the performance of databases within an industrial context with real time constraints. Although relational databases offer performant solutions, they are not able to deal with complex data. The result offers an enhanced object database dealing with high performant applications.

Generally, applications and databases do not fit very well to support real time constraints. Real time constraints are usually related to the industrial systems in which time bounded reactions of the applications are forced. This is generally due to the very high flow of data received by the applications. For example, in a control system for a nuclear reactor, there are hundreds of thermal captors that process a thermal map of the whole system every one hundredth second. Then, the thermal control application must process the results relative to one map before the receipt of the following one. In such cases, the value of the clock associated to the map will be one hundredth second at the maximum. After that period of time, the current map is not longer available and must be replaced by the next one. This happens because each event that occurs in the system is attached to a clock that specifies the validity duration of the data included in the event, the timestamp. When the duration is passed, the event becomes irrelevant. Then, within such constraints, all the treatments relative to an event must be processed before it becomes irrelevant, i.e. before the timestamp is passed by. To be able to deal with real time requirements, databases need enhanced performance features. The focus within the result was on transaction distribution, session load balancing and object clustering.

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