Introduction to High-Availability Clusters On Linux And Other Systems

A part of the RedHat enterprise server Linux distributions (can be used independently too, it seems).
Supports active-passive and probably also active-active clusters (e.g. when used on top of RedHat's GFS shared file-system).
Very simple - does no proper resource monitoring.
Has a simple GUI to configure it.
Supports I/O fencing using the STONITH mechanism.
Works with any kind of block device.

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