Requirements for deploying IBM Storage Ceph stretch cluster with arbiter

IBM Storage Ceph is an open source enterprise platform that provides unified software-defined storage on standard, economical servers and disks. With block, object, and file storage that is combined into one platform, IBM Storage Ceph efficiently and automatically manages all your data, so you can focus on the applications and workloads that use it.

This section provides a basic overview of the IBM Storage Ceph deployment. For more full deployment instructions, see IBM Storage Ceph documentation 6.1.

Note: Only Flash media is supported since it runs with min_size=1 when degraded. Use stretch mode only with all-flash OSDs. Using all-flash OSDs minimizes the time that is needed to recover once connectivity is restored, thus minimizing the potential for data loss.

Important: Erasure coded pools cannot be used with stretch mode.