Ceph » rbd

The only validation that librbd currently performs on the stripe unit is that it's a multiple of the object size. However, that technically permits stripe units of 1 byte. Restrict the minimum stripe unit size to the historical 512 byte block size.

$ rbd create --size 1M --stripe-unit 1B --stripe-count=32 image
$ rbd info image
rbd image 'image':
    size 1 MiB in 32 objects
    order 22 (4 MiB objects)
    snapshot_count: 0
    id: 102bef4986b9
    block_name_prefix: rbd_data.102bef4986b9
    format: 2
    features: layering, striping, exclusive-lock, object-map, fast-diff, deep-flatten
    op_features: 
    flags: 
    create_timestamp: Sun Oct 11 17:30:31 2020
    access_timestamp: Sun Oct 11 17:30:31 2020
    modify_timestamp: Sun Oct 11 17:30:31 2020
    stripe unit: 1 B
    stripe count: 32