Re: Ceph and NFS

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On Tue, Jan 19, 2016 at 12:36 PM, Gregory Farnum <gfarnum@xxxxxxxxxx> wrote:
> I've found that using knfsd does not preserve cephfs directory and file
> layouts, but using nfs-ganesha does. I'm currently using nfs-ganesha 2.4dev5
> and seems stable so far.

Can you expand on that? In what manner is it not preserving directory
and file layouts?
-Greg

My mistake - I wrongly assumed that the directories did not preserve layout - it was only subdirectories created under a directory that had a ceph.dir.layout xattr did not have ceph.dir.layout xattr. Files created under a subdir that does not have ceph.dir.layout still inherits the file layout. The same applies to kernel mounted as well as via knfsd, so it does preserve directory and file layouts. On a separate note, there's no way of knowing what the default ceph.dir.layout is for a subdirectory unless you traverse up the tree.

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