On Wed, Apr 19, 2023 at 5:57 PM Reto Gysi <rlgysi@xxxxxxxxx> wrote:
>
>
> Hi,
>
> Am Mi., 19. Apr. 2023 um 11:02 Uhr schrieb Ilya Dryomov <idryomov@xxxxxxxxx>:
>>
>> On Wed, Apr 19, 2023 at 10:29 AM Reto Gysi <rlgysi@xxxxxxxxx> wrote:
>> >
>> > yes, I used the same ecpool_hdd also for cephfs file systems. The new pool ecpool_test I've created for a test, I've also created it with application profile 'cephfs', but there aren't any cephfs filesystem attached to it.
>>
>> This is not and has never been supported.
>
>
> Do you mean 1) using the same erasure coded pool for both rbd and cephfs, or 2) multiple cephfs filesystem using the same erasure coded pool via ceph.dir.layout.pool="ecpool_hdd"?
(1), using the same EC pool for both RBD and CephFS.
>
> 1)
>
>
> 2)
> rgysi cephfs filesystem
> rgysi - 5 clients
> =====
> RANK STATE MDS ACTIVITY DNS INOS DIRS CAPS
> 0 active rgysi.debian.uhgqen Reqs: 0 /s 409k 408k 40.8k 16.5k
> POOL TYPE USED AVAIL
> cephfs.rgysi.meta metadata 1454M 2114G
> cephfs.rgysi.data data 4898G 17.6T
> ecpool_hdd data 29.3T 29.6T
>
> root@zephir:~# getfattr -n ceph.dir.layout /home/rgysi/am/ecpool/
> getfattr: Removing leading '/' from absolute path names
> # file: home/rgysi/am/ecpool/
> ceph.dir.layout="stripe_unit=4194304 stripe_count=1 object_size=4194304 pool=ecpool_hdd"
>
> root@zephir:~#
>
> backups cephfs filesystem
> backups - 2 clients
> =======
> RANK STATE MDS ACTIVITY DNS INOS DIRS CAPS
> 0 active backups.debian.runngh Reqs: 0 /s 253k 253k 21.3k 899
> POOL TYPE USED AVAIL
> cephfs.backups.meta metadata 1364M 2114G
> cephfs.backups.data data 16.7T 16.4T
> ecpool_hdd data 29.3T 29.6T
>
> root@zephir:~# getfattr -n ceph.dir.layout /mnt/backups/windows/windows-drives/
> getfattr: Removing leading '/' from absolute path names
> # file: mnt/backups/windows/windows-drives/
> ceph.dir.layout="stripe_unit=4194304 stripe_count=1 object_size=4194304 pool=ecpool_hdd"
>
> root@zephir:~#
>
>
>
> So I guess I should use a different ec datapool for rbd and for each of the cephfs filesystems in the future, correct?
Definitely a different EC pool for RBD (i.e. don't mix with CephFS).
Not sure about the _each_ of the filesystems bit -- Venky or Patrick can
comment on whether sharing an EC pool between filesystems is OK.
Thanks,
Ilya
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