High Availability solutions targeting Linux Systems cannot by nature depend on costly external storage solutions

The need to avoid external shared disk solutions and all the compatibility problems they can bring has become a necessity.

This is why KeyCluster integrates replica resources to gain the most from local hard disks on cluster nodes.

Taking advantage of the possibility of using local disks on nodes in a mirrored fashion and replicating them through the heartbeat network, the availability rate can equal that of a more complex external storage system.

Another barrier is dropped in favour of low cost, linux-based cluster systems.