Cannot map rbd image with striping!

[Hadi Montakhabi <hadi@xxxxxxxxx>]

Hi Cephers,

Here is the problem I am facing.

I would like to use striping feature with rbd.

When I create an image with striping arguments defined, I cannot map it:

[cephuser@node01 ~]$ rbd create ceph-client0-rbd0 --image-format 2 --size 10240 --stripe-unit 65536 --stripe-count 4

[cephuser@node01 ~]$ sudo rbd map --image ceph-client0-rbd0                     

rbd: sysfs write failed

rbd: map failed: (22) Invalid argument

However, when I create an image without striping arguments, it gets mapped with no problem:

[cephuser@node01 ~]$ rbd create ceph-client0-rbd0 --size 10240

[cephuser@node01 ~]$ sudo rbd map --image ceph-client0-rbd0

/dev/rbd0

Any thoughts what could go wrong?

Thanks,

Hadi

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