How to Optimally Configure a Quorum Disk in Red Hat Enterprise Linux Clustering and High-Availability Environments

There are a number of factors to consider when determining whether or not to include a quorum disk in your cluster. In most cases, a quorum disk is unnecessary and can lead to additional configuration complexity, increasing the likelihood that an incorrect setting might cause unexpected behavior. Red Hat recommends that you only deploy quorum disk if absolutely necessary.

This document, linked under Attachments below, describes the most common use cases for quorum disk and how to optimally configure a quorum disk in a Red Hat cluster. This includes heuristics and settings for multipath. For more information, see the the following additional resources:

• The Cluster Administration and High Availability Add-On Overview documents from Official Product Documentation corresponding to the version of Red Hat Enterprise Linux in your cluster
• man qdisk
• man cman
• man cluster.conf
• man openais.conf