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A short glossary for those who are unfamiliar with the topic:

  • Ceph is an open source distributed object storage platform.
  • Ceph OSD is the object storage daemon responsible for storing the object data on a local disk
  • Ceph MSD is the metadata server daemon that manage object access and the filesystem namespace
  • CephFS a POSIX filesystem on top of a ceph cluster
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    This is painfully similar to my own experiences with Ceph.