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An Efficient Log File Analysis algorithm Using binary-based Data Structure

Procedia - Social and Behavioral Sciences 2014年 129卷 518-526页

作者： Sallam Osman Fageeri Rohiza Ahmad Department of Computer & Information Science Universiti Teknologi PETRONAS Malaysia

Log files provide valuable insight to previous history of system's usages. Using the information from a log file can help improve future access of a system. However, log files often contain huge amount of data which require significant amount of time to be processed. Even though some popular algorithms already exist to handle this, it is still an open challenge for researchers to further improve them. Hence, in this paper, a novel binary-based approach for frequency mining of a database log file is presented. The approach includes the use of a new algorithms along with its supportive data structures. Construction of the approach began with evaluation of some of the existing methods and identifying their drawbacks. From there the new algorithms were developed and tested. Initial experimentation of the approach reveals a significant improvement in terms of the execution time of the log file's frequency mining calculation.

关键词： Log File Frequency Mining binary-based algorithm Data Structure

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Recursive multi-factoring algorithm for MPI_Allreduce

Recursive multi-factoring algorithm for MPI_Allreduce

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International Conference on Parallel and Distributed Computing and Networks

作者： Imamura, Toshiyuki Univ Electro Commun Dept Comp Sci Chofu Tokyo 1828585 Japan

ISBN: (纸本)9780889866379

This paper shows an effective all-reduction algorithm and its implementation on the Message Passing Interface. It performs comparatively stable in case not only composite numbers of processors but also prime numbers, since we introduce the process detachment strategy on each factorizing stage. On a preliminary test, we examine its efficiency, and we discuss and compare it with the existing algorithms by introducing a performance model of our algorithm.

关键词： collective communication MPI Allreduce binary-based algorithm binomial algorithm Rabensefner's algorithm

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