Anybody know about changes in rbd feature 'striping'? May be is
deprecated feature? What I mean:
I have volume created by Jewel client on Luminous cluster.
# rbd --user=cinder info
solid_rbd/volume-12b5df1e-df4c-4574-859d-22a88415aaf7
rbd image 'volume-12b5df1e-df4c-4574-859d-22a88415aaf7':
size 200 GB in 51200 objects
order 22 (4096 kB objects)
block_name_prefix: rbd_data.73bb33166d45615
format: 2
features: layering, striping, exclusive-lock, object-map, fast-diff
flags:
create_timestamp: Tue Jan 16 15:06:26 2018
stripe unit: 4096 kB
stripe count: 1
Striping is enabled.
When I was try create volume by Luminous client:
# rbd --user=cinder create solid_rbd/mysupervol --size=1G
--image-feature layering,striping
# rbd --user=cinder info solid_rbd/mysupervol
rbd image 'mysupervol':
size 1024 MB in 256 objects
order 22 (4096 kB objects)
block_name_prefix: rbd_data.ae31f32ae8944a
format: 2
features: layering
flags:
create_timestamp: Mon Jan 29 14:11:10 2018
Striping is silently disabled, due lack of stripe_unit and stripe_count
defaults:
# ceph --show-config | grep rbd_default_stripe
rbd_default_stripe_count = 0
rbd_default_stripe_unit = 0
Try to define manual defaults
<http://docs.ceph.com/docs/master/man/8/rbd/#striping>
# rbd --user=cinder create solid_rbd/mysupervol --size=1G
--image-feature layering,striping --stripe-unit 4096 --stripe-count 1
# rbd --user=cinder info solid_rbd/mysupervol
rbd image 'mysupervol':
size 1024 MB in 256 objects
order 22 (4096 kB objects)
block_name_prefix: rbd_data.adebc974b0dc51
format: 2
features: layering, striping
flags:
create_timestamp: Mon Jan 29 14:16:13 2018
stripe unit: 4096 bytes
stripe count: 1
So maybe is just a bug?
k
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