Network File System Implementation on Computer-Based Exam

In the world of education, exam is the final stage to evaluate the student abil-ity. The length of the correction process and the expensive cost of printing for manually exams are obstacles that often occurs when administering the ex-ams. Computer-based exams is an effort that is present to solve the problems, by using a computer, then the cost of printing documents and others can be minimized, besides that there is no need for manually correction time, be-cause when students finished the exam, the student's grades can be immedi-ately known. So many advantages are offered by computer-based exams but of course there are still problems that arise. The most common thing is the slow server in processing requests from clients when accessed together, in-creasing the number of servers using Network File Server is one of the efforts to correct the shortcomings of computer-based exams. Using Network File Server is expected to be able to overcome these problems.

Server Clustering in Cloud Computing Using Proxmox Based High Availability Method

Cloud Computing technology Service and data stored on machine, the server this makes important factor engine server as a supporting service availability. More and more users are accessing the service will result in engine performance server load becomes heavier and less than optimal, because the service must work continuously to provide data that can be accessed anytime by the user via the network connected. Server hardware has a performance period. Likewise with software that may crash. With functionality server which provides services to the client, the server is required to have level of availability. A high this enables the engine server to experience downtime. Server machine must also be turned off for maintenance purposes. The purpose of this study is build Clustering Server to work together as a single system which over the virtual environment. This is a solution to overcome these problems. In this study researcher use a server virtualization proxmox, FreeNAS is a NAS server and DRBD to support high availability of services in the sphere of HA, data synchronization in a High Availability to perform mirroring another system machine. With the implementation of the method of HA and synchronization DRBD and NFS (Network File System) on a system cluster obtained results average migration time on node1 towards node2 reach 9.7(s), 3.7(s) for node2 towards node3, and 3(s) on node3 towards node1. Also obtained downtime less amounting 0.58 ms on node1, on node2 0.02 ms, and 0.02 ms on node3.

Booting of Diskless Workstation

This paper focuses on proposing a system for centralization of the IT infrastructure by building upon the concept of Diskless Booting. The client stations are configured to boot over an existing network using the Network Boot. The Client Station lacks an actual Hard Drive, which is responsible for storing the boot files and other necessary files. It consists of other hardware excluding the Hard Drive such as, RAM, Processor, etc. The network consists of DHCP (Dynamic Host Configuration Protocol) server which assigns IP addresses to several client stations connected. The NIS (Network Information Service) server stores the login credentials of all the users, enabling the users to login from any client station without any restrictions. The NFS (Network File System) server makes the files available for the user, even on the absence of local secondary storage. Security is ensured by SHA (Security Hash Algorithm), which encrypts the sensitive data by creating the hash values. Individual ports and services can be kept secured by using the Firewall service. The open source Cockpit Tool provides a GUI with which the administrator can conveniently carry out several admin-oriented tasks, such as memory management, user management.

Clustering Server Pada Cloud Computing Berbasis Proxmox VE Menggunakan Metode High Availability

Layanan dan data teknologi Cloud Computing tersimpan pada server, hal ini menjadikan faktor pentingnya server sebagai pendukung ketersediaan layanan. Semakin banyak pengguna yang mengakses layanan tersebut akan mengakibatkan beban kinerja mesin server menjadi lebih berat dan kurang optimal, karena layanan harus bekerja menyediakan data terus-menerus yang dapat diakses kapanpun oleh penggunanya melalui jaringan terkoneksi. Perangkat keras server memiliki masa performa kinerja. Hal serupa dengan perangkat lunak yang dapat mengalami crash. Dengan fungsi server yang memberikan layanan kepada client, server dituntut untuk memiliki tingkat availability yang tinggi. Hal tersebut memungkinkan mesin server mengalami down. Server juga harus dimatikan untuk keperluan pemeliharaan. Penelitian bertujuan ini membangun Clustering Server yang dapat bekerja bersama yang seolah merupakan sistem tunggal diatas lingkungan virtual. Hal ini merupakan solusi untuk mengatasi permasalahan tersebut. Pada penelitian ini penulis menggunakan server virtualisasi proxmox, FreeNAS sebagai server NAS dan DRBD untuk pendukung ketersediaan layanan tinggi dalam lingkup HA, sinkronisasi data dalam High Availability (HA) yang dapat melakukan mirroring sistem kemesin lain. Dengan diterapkannya metode HA dan sinkronasi DRBD serta penggunaan NFS (Network File System) pada sistem cluster didapatkan hasil rata-rata waktu migrasi sebesar 9.7(s) pada node1 menuju node2, 3.7(s) node2 menuju node3, dan 3(s) pada node3 menuju node1. Didaptkan juga waktu downtime yang lebih sedikit yaitu sebesar 0.58 ms pada node1, 0.02 ms pada node2, dan 0.02 ms pada node3.