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HA-OSCAR: Five Steps to a High-Availability Linux Cluster
by Ibrahim Haddad and Chokchai Leangsuksun, Stephen L. Scott
02/03/2005
The HA-OSCAR project's primary goal is to improve the existing OSCAR, Beowulf architecture, and
cluster management technology systems (including OSCAR, ROCKS, and Scyld) while providing high-
availability and scalability capabilities for Linux clusters. The OCG recognized the project as an official
working group, along with the current OSCAR and Thin-OSCAR working groups. HA-OSCAR
introduces several enhancements and new features to OSCAR, mainly in the areas of availability,
scalability, and security. The new features in the initial release are head node redundancy and self-
recovery for hardware, service, and application outages.
This document provides a systematic installation guide for system administrators, as well as a detailed
explanation of what happens during the installation. This guide assumes familiarity with basic Linux
mands. Prior knowledge of OSCAR installation and administration will be useful.
Supported Distributions and System Requirements
The HA-OSCAR team has tested HA-OSCAR to work with OSCAR , , and based on Red
Hat . The test environment for the installation discussed in this article is as follows:
? Head node: Two dual Xeon machines, each with 1GB of RAM, a 40GB HD, and two
network interface cards (NICs)
? Client node: Four dual Xeon machines, each with 1GB of RAM, a 40GB HD, and two
NICs
? Switch: D-Link 10/100Mbps switch
This article assumes that you have built the cluster with OSCAR beforehand. If this is not the case,
please refer to the OSCAR project page for the OSCAR installation procedure.
The primary and standby servers s