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Linux High Availability: The Complete Documentation

• This category contains 6 Papers
• The last paper was added on 2007-03-26 (YYYY-MM-DD)

High Availability Cluster Checklist

Published on 2000-12-01, by Tim Burke, ©Specialized Systems Consultants, Inc..

In today's competitive environment, the adage "time is money"' takes on literal meaning. Keeping your business' data on-line and accessible is the foundation of overall system uptime. Whether it be database back ends, web servers or network file systems (NFS) used as e-mail and user directories, outages in your data storage tier can be catastrophic.

High Availability NFS Server with Linux Heartbeat

Published on August 2003, by André Bonhôte, ©Linux Magazine.

Clusters or failover solutions are the typical answer to high availability on Linux. Linux Heartbeatmakes light work of this with a redundant NFS Server and a shared hard disk.

High Availability systems under Linux

Published on November 2000, by Atif Ghaffar, ©Atif Ghaffar.

Even though I trust Linux blindly, I don't trust the companies that make the machines, power supply, network cards, motherboards etc, and I am always afraid that if one of these fail, my system will be unusable. Hence the service will be unavailable, further more I will be taking down all the company services even though they are not directly related to me.

High-Availability File Server with heartbeat

Published on September 2001, by Steve Blackmon and John Nguyen, ©CMP Media LLC.

Maintaining maximum system uptime is becoming increasingly critical to the success of any organization. While there are many off-the-shelf solutions for high availability, they are often very expensive and require expertise that smaller companies do not have on staff. In this article, we present a much lower cost alternative to achieving high-availability (HA) services using inexpensive hardware and publicly available software. A systems administrator can learn to use and maintain our system with minimal time investment. We will provide step-by-step procedures for building a high-availability file server for UNIX and Windows clients. Although the article focuses on how to set up a file server, the technique could be applied to any number of services.

Highly Available LDAP

Published on December 01, 2002, by Jay D. Allen and Cliff White, ©Specialized Systems Consultants, Inc..

As an organization adds applications and services, centralizing authentication and password services can increase security and decrease administrative and developer headaches. However, consolidating any service on a single server creates reliability concerns. High availability is especially critical for enterprise authentication services, because in many cases the entire enterprise comes to a stop when authentication stops working. This article describes one method of creating a reliable authentication server cluster. We use an LDAP (Lightweight Directory Access Protocol) server to provide authentication services that can be subscribed to by various applications. To provide a highly available LDAP server, we use the heartbeat package from the Linux-HA initiative (www.linux-ha.org).

Highly-Affordable High Availability

Published on November 2003, by Alan Robertson, ©Linux Magazine.

If you're a system administrator, you've already had it happen: you've just ordered lunch when your pager goes off. No lunch for you today. Or maybe you're on the other side of the fence: the server is down, and your system administrator can't be found. You miss your deadline because no one's available to fix your critical system.