On 12/28/2013 02:40 PM, Cedric Lemarchand wrote:
Le 28/12/2013 14:35, Wido den Hollander a écrit :
On 12/28/2013 02:07 PM, Cedric Lemarchand wrote:
Hello Cepher,
As my needs are to lower the $/To, I would like to know if the
replication ratio could only be an integer or can be set to 1,5 or
1,25 ?
In others words, do Ceph can compute data parity or only do multiple
copy of data ?
No, that is not possible with simple replication.
You might be able to use the upcoming Erasure encoding which Ceph has
to offer, but it depends on your use case.
Could you give me more information about this feature (infos, URL) ?
I suggest you read these links:
* http://www.slideshare.net/Inktank_Ceph/erasure-codeceph
*
http://wiki.ceph.com/01Planning/02Blueprints/Dumpling/Erasure_encoding_as_a_storage_backend
*
http://ceph.com/docs/master/dev/osd_internals/erasure_coding/developer_notes/
You can look at it kind of similar to "raid over the network", but it
isn't that!
How and what kind of data do you want to store on Ceph?
I am evaluating an object storage solution, mainly for backup/archiving
purpose.
If you are only going to use the RADOS Gateway to do object storage you
can use Erasure encoding. It doesn't work well with RBD or CephFS.
Wido
Sorry in advance if this is a basic question !
-- Cédric
_______________________________________________
ceph-users mailing list
ceph-users@xxxxxxxxxxxxxx
http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com
--
Wido den Hollander
42on B.V.
Phone: +31 (0)20 700 9902
Skype: contact42on
_______________________________________________
ceph-users mailing list
ceph-users@xxxxxxxxxxxxxx
http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com
