Template:CephClusterCreate

Creating a Ceph Cluster

The QuantaStor Grid and a Ceph Cluster are separate constructs. The Grid must be setup first and can consist of heterogeneous mix of up to 64 appliances which can span sites. Within the grid one can create up to 20x Ceph Clusters where each cluster must have at least 3x appliances. A given appliance cannot be a member of more than one grid or cluster at the same time. Typically a grid will consist of just one or two Ceph clusters and most often the cluster is built using appliances that are all within one site but a cluster can span multiple sites as long as the network connectivity is stable and the latency is relatively low. For high latency links the preferred method is to setup a asynchronous remote-replication link to transfer data (delta changes) from a primary to a secondary site based on a schedule.

Make sure that all of the network ports selected for the front-end network are the ports that will be used for client access (S3/SWIFT, iSCSI/RBD) and that the back-end ports are on a private network.