Hi Dieter,
There is a new xattr based interface. See
https://github.com/ceph/ceph/blob/master/qa/workunits/fs/misc/layout_vxattrs.sh
The nice part about this interface is no new tools are necessary (just
standard 'attr' or 'setfattr' commands) and it is the same with both
ceph-fuse and the kernel client.
sage
On Mon, 18 Aug 2014, Kasper Dieter wrote:
> Hi Sage,
>
> a couple of months ago (maybe last year) I was able to change the
> assignment of Directorlies and Files of CephFS to different pools
> back and forth (with cephfs set_layout as well as with setfattr).
>
> Now (with ceph v0.81 and Kernel 3.10 an the client side)
> neither 'cephfs set_layout' nor 'setfattr' works anymore:
>
> # mount | grep ceph
> ceph-fuse on /mnt/ceph-fuse type fuse.ceph-fuse
> (rw,nosuid,nodev,allow_other,default_permissions)
> 192.168.113.52:6789:/ on /mnt/cephfs type ceph (name=admin,key=client.admin)
>
> # ls -l /mnt/cephfs
> total 0
> -rw-r--r-- 1 root root 0 Aug 18 21:06 file
> -rw-r--r-- 1 root root 0 Aug 18 21:10 file2
> -rw-r--r-- 1 root root 0 Aug 18 21:11 file3
> drwxr-xr-x 1 root root 0 Aug 18 20:54 sas-r2
> drwxr-xr-x 1 root root 0 Aug 18 20:54 ssd-r2
>
> # getfattr -d -m - /mnt/cephfs
> getfattr: Removing leading '/' from absolute path names
> # file: mnt/cephfs
> ceph.dir.entries="5"
> ceph.dir.files="3"
> ceph.dir.layout="stripe_unit=4194304 stripe_count=1 object_size=4194304
> pool=SAS-r2"
> ceph.dir.rbytes="0"
> ceph.dir.rctime="0.090"
> ceph.dir.rentries="1"
> ceph.dir.rfiles="0"
> ceph.dir.rsubdirs="1"
> ceph.dir.subdirs="2"
>
> # setfattr -n ceph.dir.layout.pool -v SSD-r2 /mnt/cephfs
> setfattr: /mnt/cephfs: Invalid argument
>
> # ceph osd dump | grep pool
> pool 0 'data' replicated size 3 min_size 2 crush_ruleset 0 object_hash
> rjenkins pg_num 8064 pgp_num 8064 last_change 1 flags hashpspool
> crash_replay_interval 45 stripe_width 0
> pool 1 'metadata' replicated size 3 min_size 2 crush_ruleset 0 object_hash
> rjenkins pg_num 8064 pgp_num 8064 last_change 1 flags hashpspool stripe_width > 0
> pool 2 'rbd' replicated size 3 min_size 2 crush_ruleset 0 object_hash
> rjenkins pg_num 8064 pgp_num 8064 last_change 1 flags hashpspool stripe_width > 0
> pool 3 'SSD-r2' replicated size 2 min_size 2 crush_ruleset 3 object_hash
> rjenkins pg_num 6000 pgp_num 6000 last_change 404 flags hashpspool
> stripe_width 0
> pool 4 'SAS-r2' replicated size 2 min_size 2 crush_ruleset 4 object_hash
> rjenkins pg_num 6000 pgp_num 6000 last_change 408 flags hashpspool
> stripe_width 0
> pool 5 'SSD-r3' replicated size 3 min_size 2 crush_ruleset 3 object_hash
> rjenkins pg_num 4000 pgp_num 4000 last_change 413 flags hashpspool
> stripe_width 0
> pool 6 'SAS-r3' replicated size 3 min_size 2 crush_ruleset 4 object_hash
> rjenkins pg_num 4000 pgp_num 4000 last_change 416 flags hashpspool
> stripe_width 0
>
> # getfattr -d -m - /mnt/cephfs/ssd-r2
> getfattr: Removing leading '/' from absolute path names
> # file: mnt/cephfs/ssd-r2
> ceph.dir.entries="0"
> ceph.dir.files="0"
> ceph.dir.rbytes="0"
> ceph.dir.rctime="0.090"
> ceph.dir.rentries="1"
> ceph.dir.rfiles="0"
> ceph.dir.rsubdirs="1"
>
> # setfattr -n ceph.dir.layout.pool -v SSD-r2 /mnt/cephfs/ssd-r2
> setfattr: /mnt/cephfs/ssd-r2: Invalid argument
>
> # cephfs /mnt/cephfs/ssd-r2 set_layout -p 3 -s 4194304 -u 4194304 -c 1
> Error setting layout: (22) Invalid argument
>
>
> Any recommendations ?
> Is this a bug, or a new feature ?
> Do I have to use a newer Kernel ?
>
>
> Kind Regards,
> -Dieter
>
>
>
> On Sat, Aug 31, 2013 at 02:26:48AM +0200, Sage Weil wrote:
> > On Fri, 30 Aug 2013, Joao Pedras wrote:
> > >
> > > Greetings all!
> > >
> > > I am bumping into a small issue and I am wondering if someone has any
> > > insight on it.
> > >
> > > I am trying to use a pool other than 'data' for cephfs. Said pool has id
> > > #3
> > > and I have run 'ceph mds add_data_pool 3'.
> > >
> > > After mounting cephfs seg faults when trying to set the layout:
> > >
> > > $> cephfs /path set_layout -p 3
> > >
> > > Segmentation fault
> > >
> > > Actually plainly running 'cephfs /path set_layout' without more options
> > > will
> > > seg fault as well.
> > >
> > > Version is 0.61.8 on ubuntu 12.04.
> > >
> > > A question that comes to mind here is if there is a way of accomplishing
> > > this when using ceph-fuse (<3.x kernels).
> >
> > You can adjust this more easily using the xattr interface:
> >
> > getfattr -n ceph.dir.layout <dir>
> > setfattr -n ceph.dir.layout.pool -v mypool
> > getfattr -n ceph.dir.layout <dir>
> >
> > The interface tests are probably a decent reference given this isn't
> > explicitly documented anywhere:
> >
> >
> > https://github.com/ceph/ceph/blob/master/qa/workunits/misc/layout_vxattrs.sh
> >
> > sage
> > _______________________________________________
> > ceph-users mailing list
> > [email protected]
> > http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com
>
>
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