A "cost function" for evaluate my distributed query optimizer algorithm?

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Daniel Kostrzewa

Unfortunatelly, it can be a complex problem.

I've done some research on this field.

Please have a look on attached work and "A Systematic Method for Query Evaluation in Distributed Heterogeneous Databases" by Yangjun Chen.

Chapter The Comparison of an Adapted Evolutionary Algorithm with the...

Manik Sharma

The cost function can be created based upon response time or throughput i.e. usage of system resources required to execute the query.

you can refer the any standard book on distributed database system for further clarification.