Browsing by Author "Mustafa Mat Deris"

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    Efficient access of replicated data in distributed database systems
    (Universiti Putra Malaysia, 2001-09) Mustafa Mat Deris
    Replication is a useful technique for distributed database systems where a data object will be accessed (i.e., read and written) from multiple locations such as from a local area network environment or geographically distributed world wide. This technique is used to provide high availability, fault tolerance, and enhanced performance.
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    IncSPADE
    (Springer International Publishing Switzerland, 2016) Omer Adam; Zailani Abdullah; Amir Ngah; Kasypi Mokhtar; Wan Muhamad Amir Wan Ahmad; Tutut Herawan; Noraziah Ahmad; Mustafa Mat Deris; Abdul Razak Hamdan; Jemal H. Abawajy
    In this paper we propose Incremental Sequential PAttern Discovery using Equivalence classes (IncSPADE) algorithm to mine the dynamic database without the requirement of re-scanning the database again. In order to evaluate this algorithm, we conducted the experiments against three different artificial datasets. The result shows that IncSPADE outperformed the benchmarked algorithm called SPADE up to 20%.
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    Review of Replication Techniques for Distributed Systems
    (LNCS, 2015) Ahmad Shukri Mohd Noor; Nur Farhah Mat Zian; Mustafa Mat Deris; Tutut Herawan
    Distributed systems primarily provide the access to data intensive computation through a wide range of interfaces. Due to the advances of the systems, the scales and complexity of the system have increased, causing faults are likely bound to happen leading into diverse faults and failure conditions. Therefore, fault tolerance has become a crucial property for distributed system in order to preserve its function correctly and available in the presence of faults. Replication techniques particularly concentrates on two fault tolerance manners; masking the failures on the fly as well as reconfiguring the systems in response. This paper presents a brief reviews on different replication techniques, such as Grid Configuration (GC), Box-Shaped Grid (BSG) and Neighbor Replication on Grid (NRG) by comparing and formalizing its communication costs and availabilities analysis based on k-out-of-n model. Each of these techniques presents their own merits and demerits which form the subject matter of this review.