Guys, As I understand, ceph can become fully saturated even with some osds partially free(in terms of disk usage). When some osds become fully saturated ceph becomes virtually unusuable. So, it means I need to add more osds even if I still have some space left. For me it means I'm wasting my disk space. Another option is to rebalance the cluster, but this process is unpredictable. Are there any data about the normal percentage of this free disk space waste in Firefly. Has the situation gotten better in later versions of ceph: Hammer, Jewel? Thanks, Victor. -- To unsubscribe from this list: send the line "unsubscribe ceph-devel" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html