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Joko Purwadi
Duta Wacana Christian University
Computer Science & IT

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GENERATOR POHON KEPUTUSAN DENGAN MENERAPKAN ALGORITMA C4.5 UNTUK PROGRAM KONSULTASI Irma Kharis; Rosa Delima; Joko Purwadi
Jurnal Informatika Vol 9, No 1 (2013): Jurnal Informatika
Publisher : Universitas Kristen Duta Wacana

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (5860.533 KB) | DOI: 10.21460/inf.2013.91.145

Abstract

C4.5 algorithm is used to simplify decision tree from decision table by generating decision tree from an existing decision tree. With this algorithm, knowledge base in the decision table can be simplified. This research will build a consultation program using C4.5 algorithm which is called decision tree generator. Decision tree generator provides inference facility and a user interface for consultation. The user is required to build a knowledge base first, and the application will generate user interface automatically. There are two steps in decision tree generator: firstly, the application will build the decision tree, and after that the application will build the user interface for consultation session. The results of this research show that the decision tree generator can get goal and advice from tree exploration in consultation session.
Implementasi Load Balancing Web Server Menggunakan Metode LVS-NAT Jefry Alvonsius Rabu; Joko Purwadi; Willy Sudiarto Raharjo
Jurnal Informatika Vol 8, No 2 (2012): Jurnal Informatika
Publisher : Universitas Kristen Duta Wacana

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (6069.19 KB) | DOI: 10.21460/inf.2012.82.126

Abstract

Web server plays a vital role on serving requests from clients. As Internet users grows so fast, the request number increases significantly, thus reducing the overall performance of the web server. One solution is to implement a load balancing system.In this paper, we implement load balancing with Linux Virtual Server to distribute the load to several machines within a cluster. We compared Round Robbin and Least Connection algorithm. The study reveals that load balancing using LVS-NAT can double the throughput output compared to single web server, but less significant on response time and CPU utilization. Implementing LVS-NAT using round robbin algorithm is more robust in optimizing the throughput, CPU utilization, and response time compared to least connection.
Co-Authors Irma Kharis Jefry Alvonsius Rabu Rosa Delima Willy Sudiarto Raharjo