Real-Time Database and Information Systems: Research Advances 87 chto moe mesto zdes'

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Real-Time Database and Information Systems: Research Advances 87 chto moe mesto zdes'Real time systems are defined as those for which correctness depends not only on the logical properties of the produced results, but also on the temporal properties of these results. In a database, real time means that in addition to typical logical consistency constraints, such as a constraint on a data item's value, there are constraints on when transactions execute and on the `freshness' of the data transactions access. The challenges and tradeoffs