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Chapter 3. Resilient and non-resilient data pools
What are resilient pools and a non-resilient pools?
A resilient data pool enables data to replicate or encode its data.
The non-resilient data pool does not enable to replicate or encode its data.
A non-resilient pool is also called replica1, and is not protected from data loss. A small cluster with non-resilient data pools does its own replication and does not need replication from Red Hat Ceph Storage as it does its own replication.
Cluster utilization with data pools
With smaller configurations, the cluster utilization reduces because of the loss of resiliency. The recovery is limited by host utilization and might potentially impact production input/output operations per second (IOPS). When there is a single node of failure, you can add a third node to limit the host utilization and for Red Hat Ceph Storage to recover to full replication.
