Ceph Capacity Calculator
Plan your Ceph storage cluster with the Ceph Capacity Calculator. Configure the number of OSDs, individual OSD capacity, and choose between replication (two-way or three-way) and erasure coding profiles to see projected raw and usable capacity. The tool walks you through a guided workflow: define your OSD topology, select a data-protection strategy, and review detailed results including effective storage efficiency, estimated recovery time, and recommendations for pool sizing. Advanced options let you model bluestore write-ahead log sizing, DB partition allocation, and near-full thresholds. Whether you are deploying a greenfield Ceph cluster or expanding an existing Rook-Ceph installation on Kubernetes, this calculator removes the guesswork from capacity planning. Every computation is local to your browser with no data uploaded or stored.