Am 08.05.13 21:18, schrieb Paras pradhan: > I have a three nodes swift cluster. I can see the objects being > replicated to all three nodes. Each node has 12 2TB disks. Since I > have 3 replicas the usable space is only 24TB ? Yes, that's correct. > How this will scale up if we add two more storage nodes of the same > capacity? 5 * 12 * 2 / 3: ~ 40TB usable capacity. > Also, is there any tool to monitor the usage, health of the whole > cluster? To detect failed drives you might have a look at http://docs.openstack.org/developer/swift/admin_guide.html#detecting-failed-drives For Swift-related monitoring please refer to http://docs.openstack.org/trunk/openstack-object-storage/admin/content/ch_introduction-to-openstack-object-storage-monitoring.html For general node monitoring you can use your preferred tool (Nagios, Icinga, Shinken, RHQ, Hyperic...).