Re: cephfs <fs> set_layout --pool_meta <SSD> --pool_data <SAS>

[Andreas Bluemle <andreas.bluemle@itxperts.de>]

Hi all,

sorry; my previous answer went to ceph-devel by accident;
apologies for the use of german.

The "invalid argument" in the cephfs command was a result
of the new pool still missing at the mds.

What was missing was the corresponding

   ceph mds add_data_pool <pool id>

command to declare a new pool for being usable by mds.


Best Regards

Andreas Bluemle



On Tue, 16 Jul 2013 14:26:21 +0200
Andreas Bluemle <andreas.bluemle@itxperts.de> wrote:

> Hallo Dieter,
> 
> Kein Fehler, sondern ein fehlendes Kommando.
> Ein neuer pool muss dem mds erst bekannt gemacht werden.
>      ceph mds add_data_pool <pool number>
> 
> Siehe Mitschnitt unten.
> 
> Damit duerfte uebrigens auch meine Frage von gestern geloest
> sein: die zugehoerigkeit zu einem bestimmten Pool kann 
> fuer ein Verzeichnis und damit einen ganzen Baum vergeben
> werden.
> 
> Mit freundlichen Gruessen
> 
> Andreas Bluemle
> 
> [root@rx37-2 ~]# cephfs /mnt/cephfs/pool3 set_layout -s 4194304 \
>                       -c 1 -u 4194304 -p 6
> Error setting layout: Invalid argument
> 
> [root@rx37-2 ~]# ceph mds add_data_pool 6
> added data pool 6 to mdsmap
> 
> [root@rx37-2 ~]# cephfs /mnt/cephfs/pool3 set_layout -s 4194304 \
>                       -c 1 -u 4194304 -p 6
> [root@rx37-2 ~]# cephfs /mnt/cephfs/pool3 show_layout
> layout.data_pool:     6
> layout.object_size:   4194304
> layout.stripe_unit:   4194304
> layout.stripe_count:  1
> 
> 
> 
> On Tue, 16 Jul 2013 13:58:50 +0200
> Kasper Dieter <dieter.kasper@ts.fujitsu.com> wrote:
> 
> > BTW is there are a solution to put Cephfs metadata on a pool
> > 'SSD-group' and Cephfs data on a 2nd pool 'SAS-group' ?
> > 
> > Regards,
> > Dieter Kasper
> > 
> > 
> > On Tue, Jul 16, 2013 at 01:54:48PM +0200, Kasper Dieter wrote:
> > > I followed the description
> > > http://www.sebastien-han.fr/blog/2013/02/11/mount-a-specific-pool-with-cephfs/
> > > ... to change the pool assigned to cephfs:
> > > 
> > > # ceph osd dump | grep rule
> > > pool 0 'data' rep size 2 min_size 1 crush_ruleset 0 object_hash
> > > rjenkins pg_num 10304 pgp_num 10304 last_change 1 owner 0
> > > crash_replay_interval 45 pool 1 'metadata' rep size 2 min_size 1
> > > crush_ruleset 1 object_hash rjenkins pg_num 10304 pgp_num 10304
> > > last_change 1 owner 0 pool 2 'rbd' rep size 2 min_size 1
> > > crush_ruleset 2 object_hash rjenkins pg_num 10304 pgp_num 10304
> > > last_change 1 owner 0 pool 3 'SSD-group-2' rep size 2 min_size 1
> > > crush_ruleset 3 object_hash rjenkins pg_num 3300 pgp_num 3300
> > > last_change 299 owner 0 pool 4 'SSD-group-3' rep size 3 min_size 1
> > > crush_ruleset 3 object_hash rjenkins pg_num 3300 pgp_num 3300
> > > last_change 302 owner 0 pool 5 'SAS-group-2' rep size 2 min_size 1
> > > crush_ruleset 4 object_hash rjenkins pg_num 3300 pgp_num 3300
> > > last_change 306 owner 0 pool 6 'SAS-group-3' rep size 3 min_size 1
> > > crush_ruleset 4 object_hash rjenkins pg_num 3300 pgp_num 3300
> > > last_change 309 owner 0
> > > 
> > > # cephfs /mnt/cephfs/ show_layout
> > > layout.data_pool:     0
> > > layout.object_size:   4194304
> > > layout.stripe_unit:   4194304
> > > layout.stripe_count:  1
> > > 
> > > # mount | grep ceph
> > > 10.10.38.13:/ on /mnt/cephfs type ceph
> > > (name=admin,key=client.admin)
> > > 
> > > # cephfs /mnt/cephfs/ set_layout -p 3 -u 4194304 -c 1 -s 4194304
> > > Error setting layout: Invalid argument
> > > 
> > > 
> > > Is this a bug in the current release ?
> > > # ceph -v
> > > ceph version 0.61.4 (1669132fcfc27d0c0b5e5bb93ade59d147e23404)
> > > 
> > > How can this issue be solved ?
> > > 
> > > 
> > > Kind Regards,
> > > Dieter Kasper
> > --
> > To unsubscribe from this list: send the line "unsubscribe
> > ceph-devel" in the body of a message to majordomo@vger.kernel.org
> > More majordomo info at  http://vger.kernel.org/majordomo-info.html
> > 
> > 
> 
> 
> 



-- 
Andreas Bluemle                     mailto:Andreas.Bluemle@itxperts.de
Heinrich Boell Strasse 88           Phone: (+49) 89 4317582
D-81829 Muenchen (Germany)          Mobil: (+49) 177 522 0151