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All Journal Media Informatika Seminar Nasional Aplikasi Teknologi Informasi (SNATI) Jurnal Buana Informatika JUITA : Jurnal Informatika Jurnal Riset Teknologi dan Inovasi Pendidikan (Jartika) JSiI (Jurnal Sistem Informasi) INTEK: Informatika dan Teknologi Informasi
Teduh Dirgahayu
Department of Informatics, Islamic University of Indonesia
Arts Humanities Computer Science & IT Control & Systems Engineering Decision Sciences, Operations Research & Management Education Engineering Mathematics Social Sciences Other

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Journal : Media Informatika

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Comparison on Efficiency and Speed of 2-Tier And 3-Tier OLTP Systems Teduh Dirgahayu; Muhammad Indra Utama
Media Informatika Vol. 2 No. 2 (2004)
Publisher : Department of Informatics,Faculty of Industrial Technology,Islamic University of Indonesia

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Abstract

Online Transaction Processing (OLTP) systems are characterized by a large number of users accessing online data simultaneously. Available architectures for distributed OLTP systems are 2-tier and 3-tier client/server architecture. Two major factors that have to be considered in deciding architecture of an OLTP system are resource efficiency and speed. This research aimed to compare those two different architectures on efficiency and speed. As a test bed, we developed 2-tier and 3-tier web-based application for online banking using Microsoft COM+ and ASP. We then tested them using Microsoft Web Application Stress Tool. Our components were designed into two layers: Business Access Layer (BAL) and Data Access Layer (DAL). The results show us that there was a trade-off on resource efficiency and system’s speed. The 2-tier OLTP system gave us better speed performance but lower resource efficiency. On the other hand, the 3-tier system offered more efficient resource utilization i.e. it saved 62% - 64% of the connection needed for 2-tier system, but its speed reduced at about 24% than the speed of 2-tier system. Further research is needed to examine more number of concurrent users in longer test duration so as to get realistic behaviors of large OLTP systems.
Dari Konstruksi Pemrograman BPEL ke Notasi Grafis ISDL Teduh Dirgahayu
Media Informatika Vol. 3 No. 1 (2005)
Publisher : Department of Informatics,Faculty of Industrial Technology,Islamic University of Indonesia

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Abstract

Tulisan ini menyajikan hasil pemetaan beberapa konstruksi pemrograman BPEL (Business Process Execution Language for Web Services) ke notasi grafis ISDL (Interaction Systems Design Language). Pemetaan telah mencakup baik konstruksi pemrograman umum maupun konstruksi pemrograman khusus BPEL. Konstruksi-konstruksi pemrograman tersebut adalah penugasan, pengambilan keputusan, perulangan, pengurutan eksekusi, penerimaan permintaan, pengembalian hasil, permintaan layanan, penantian, dan eksekusi paralel. Dengan pengetahuan hasil pemetaan ini, suatu model ISDL yang bebas teknologi implementasi dapat lebih dirinci untuk diimplementasikan pada teknologi Web services dengan BPEL sebagai bahasa pemrogramannya.
Co-Authors Abdul Azis Danar Retno Sari Faris Ikbal Musyaffa Gigih Istiawan Hanson Prihantoro P Irving Vitra Paputungan Lahan Adi Purwanto Muhammad Indra Utama Muhammad Rizky Rizki Setyo Nugroho Sjamsul Arifin TAUFIQ HIDAYAT Yundari, Yundari