CephFS : minimum stripe_unit ?

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Hi everyone,

I use Ceph-fuse on a Jewel cluster.

I would like to set stripe_unit to 8192 on a directory but it seems not
possible :

# setfattr -n ceph.dir.layout.stripe_unit -v "8192" maildata1
setfattr: maildata1: Invalid argument

I know stripe_unit must be a multiple of object_size. I didn't change
object_size and default value seems to be 4194304.

And 8192 is a multiple of 4194304, isn't it ?

Is there a minimum value ?

Thank you.

Florent

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