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Data is replicated on across three disks on three nodes in three racks with distinct power feeds and network paths, secured against simultaneous failure of two full nodes in the primary data center. With current connectivity, the cluster supports an aggregate read/write speed of 3.75GB/s, with capability to increase bandwidth as needed. The Ceph software performs daily and weekly data scrubbing to ensure replicas remain consistent. An option for daily snapshots of data and stored to a secondary data center on Lehigh’s campus is also available.
NOTE: Ceph does not do backups. If you need daily snapshot and store the snapshots, you need to purchase an additional block of Ceph storage. If you need backup, one alternative is mount the Ceph project as a network drive and use Crashplan to backup contents in your Ceph project.
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