Chapter 29. Set the Number of Object Replicas

To set the number of object replicas on a replicated pool, execute the following:

ceph osd pool set <poolname> size <num-replicas>

For example:

ceph osd pool set data size 3

You may execute this command for each pool. Note: An object might accept I/Os in degraded mode with fewer than pool size replicas. To set a minimum number of required replicas for I/O, you should use the min_size setting. For example:

ceph osd pool set data min_size 2

This ensures that no object in the data pool will receive I/O with fewer than min_size replicas.