Data Consistency

As a part of maintaining data consistency and cleanliness, OSDs can scrub objects in PGs, that is, OSDs compare metadata of different OSD object copies in a PG. Scrubbing is usually performed daily to capture OSD defects and file system errors. OSDs also perform deeper scrubbing by comparing object data by bit to capture bad sectors on drives that are not detected during light scrubbing.

To ensure data consistency in the Ceph cluster, you can select either of the multi-copy solution and erasure coding solution.