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A new multithreaded version of linear discriminant analysis is added to Sipina 3.11. Compared to the previous, it presents two assets: (1) it is able to use all the resources available on the machines with multi-core processors or multiprocessor; (2) the load balancing is better . It requires however more amount of memory, the internal structures of calculation are duplicated M times (M is the number of threads). A tutorial will come to compare the behavior of this approach with the previous version and the single-threaded implementation. Keywords : linear discriminant analysis, multihreaded implementation, multithread Sipina website : Sipina Download : Setup file

Most of the modern personal computers have multicore CPU. This increases considerably their processing capabilities. Unfortunately, the popular free data mining tools does not really incorporate the multithreaded processing in the data mining algorithms they provide, aside from particular case such as ensemble methods or cross-validation process. The main reason of this scarcity is that it is impossible to define a generic framework whatever the mining method. We must study carefully the sequential algorithm, detect the opportunity of multithreading, and reorganize the calculations. We deal with several constraints: we must not increase excessively the memory occupation, we must use all the available cores, and we must balance the loads on the threads. Of course, the solution must be simple and operational on the usual personal computers. Previously, we implemented a solution for the decision tree induction in Sipina 3.5. We studied also the solutions incorporated in Knime and RapidMin

The linear discriminant analysis has been enhanced. All operations are performed in a single pass on the data. A multithreaded version of the linear discriminant analysis has been added. It improves the execution speed by distributing calculations on any hearts (computer with a multi-core processor) or processors (multi-processor computer) available on the computer. A tutorial will describe the behavior of these new implementations on some large databases. Keywords : linear discriminant analysis, multihreaded implementation Sipina website : Sipina Download : Setup file