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ceph-up-set · shipping · also Ceph up set

Up set (Ceph)

In Ceph, the up set is the ordered OSD list assigned to a placement group by CRUSH for a particular map epoch.

Related Observatory article: Up set (Ceph) on hesela.com

It describes placement, not completed data transfer; an explicit PG temp override can make the acting set differ. [1]

Relations

related
placement-group, ceph-acting-set

Citations

  1. Ceph Squid developer documentation: Peering, concepts (accessed 2026-10-13)
  2. Storage availability and correlated failures: placement boundaries (accessed 2026-10-13)

JSON: /data/terms/ceph-up-set.json