Thank you all!
On 13-10-2017 00:19, Jorge Pinilla López wrote:
The rbd has 2 kinds of data, metadata and data itself, the metadata
gives information about the rbd imagen and small amounts of internal
information. This one is place on the replicated pool and that's why
it's considering that the image is on the replicated pool.
But the actual data (big information) are stored in the Erasure pool.
So when you start filling your image you will see how your replicated
metadata pool grows a little bit when the actual Erasure data pool
grows way more!
You can get information about your image using rbd info {replicated
pool}/{image name}
-------- Mensaje original --------
De: Josy <[email protected]>
Fecha: 12/10/17 8:40 PM (GMT+01:00)
Para: David Turner <[email protected]>, [email protected]
Cc: ceph-users <[email protected]>
Asunto: Re: [ceph-users] Erasure coding with RBD
Thank you for your reply.
I created a erasure coded pool 'ecpool' and a replicated pool to store
metadata 'ec_rep_pool'
And created image as you mentioned :
rbd create --size 20G --data-pool ecpool ec_rep_pool/ectestimage1
But the image seems to be created in ec_rep_pool*
*
============
[cephuser@ceph-las-admin-a1 ceph-cluster]$ rbd ls -l ecpool
[cephuser@ceph-las-admin-a1 ceph-cluster]$ rbd ls -l ec_rep_pool
NAME SIZE PARENT FMT PROT LOCK
ectestimage 20480M 2
ectestimage1 20480M 2
Is that how it suppose to work ?
On 12-10-2017 23:53, David Turner wrote:
Here is your friend.
http://docs.ceph.com/docs/luminous/rados/operations/erasure-code/#erasure-coding-with-overwrites
On Thu, Oct 12, 2017 at 2:09 PM Jason Dillaman <[email protected]
<mailto:[email protected]>> wrote:
The image metadata still needs to live in a replicated data pool --
only the data blocks can be stored in an EC pool. Therefore, when
creating the image, you should provide the "--data-pool <pool-name>"
optional to specify the EC pool name.
On Thu, Oct 12, 2017 at 2:06 PM, Josy <[email protected]
<mailto:[email protected]>> wrote:
> Hi,
>
> I am trying to setup an erasure coded pool with rbd image.
>
> The ceph version is Luminous 12.2.1. and I understand, since
Luminous, RBD
> and Cephfs can store their data in an erasure coded pool
without use of
> cache tiring.
>
> I created a pool ecpool and when trying to create a rbd image,
gets this
> error.
>
> ==============
>
> [cephuser@ceph-las-admin-a1 ceph-cluster]$ rbd create --size 20G
> ecpool/ectestimage2
> 2017-10-12 10:55:37.992965 7f18857fa700 -1
librbd::image::CreateRequest:
> 0x55608e1e0c20 handle_add_image_to_directory: error adding image to
> directory: (95) Operation not supported
> rbd: create error: (95) Operation not supported
> ==============
>
>
>
> _______________________________________________
> ceph-users mailing list
> [email protected] <mailto:[email protected]>
> http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com
--
Jason
_______________________________________________
ceph-users mailing list
[email protected] <mailto:[email protected]>
http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com
_______________________________________________
ceph-users mailing list
[email protected]
http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com
