Implementasi Mail Server Berbasis Squirrelmail Dengan Exchange Server Menggunakan Teknologi Virtualisasi di SMK Negeri 1 Pendalian IV Koto

Teknologi virtualisasi server merupakan penggunaan bersama satu mesin fisikal oleh beberapa sistem operasi server. Perancangan dan implementasi mail server ini dibangun dengan menggunakan Debian.5 sebagai base operating system server. Perancangan dan implementasi mail server ini dibangun dengan menggunakan dns server, web server dan mail server/squirrelmail, di konfigurasi menggunakan bantuan aplikasi virtualbox sebagai server. DNS (Domain Name System) adalah sebuah sistem yang menyimpan informasi tentang nama host maupun nama domain dalam bentuk basis data tersebar (distributed database) di dalam jaringan komputer, misalkan Internet. Aplikasi yang digunakan untuk menangani penghantaran pesan mail adalah mail server. Mail server ini senantiasa menerima pesan dari e-mail client yang digunakan user, atau mungkin dari server e-mail lainnya. Web mail berfungsi untuk mengirim dan melihat pesan email melalui web browser. Konfigurasi squirrelmail dilakukan dengan menjalankan skrip conf.pl : $/var/www/wemail/config/ conf.pl. Layanan Exchange Server antara lain : Directory Service, Simple Mail Transfer Protocol (SMTP), Post Office Protocol ( POP3 ), IMAP (Internet Message Access Protocol), Complementary Services, System Attendant. Untuk Proses Pengiriman Mail Server dapat dilihat pada nomor 5.2. Kata Kunci: Squirrelmail, Exchange Server, DNS Server, Web Server, Mail Server.

Software Aging Forecasting Using Time Series Model

<p class="Normal1">With the emergence of virtualization and cloud computing technologies, several services are housed on virtualization platform. Virtualization is the technology that many cloud service providers rely on for efficient management and coordination of the resource pool. As essential services are also housed on cloud platform, it is necessary to ensure continuous availability by implementing all necessary measures. Windows Active Directory is one such service that Microsoft developed for Windows domain networks. It is included in Windows Server operating systems as a set of processes and services for authentication and <a href="https://en.wikipedia.org/wiki/Authorization">authorization </a>of users and computers in a Windows domain type network. The service is required to run continuously without downtime. As a result, there are chances of accumulation of errors or garbage leading to software aging which in turn may lead to system failure and associated consequences. This results in software aging. In this work, software aging patterns of Windows active directory service is studied. Software aging of active directory needs to be predicted properly so that rejuvenation can be triggered to ensure continuous service delivery. In order to predict the accurate time, a model that uses time series forecasting technique is built.</p>