[Gluster-devel] Is it possible to setup a RAID 6 using GlusterFS?

[Xavier Hernandez]

Hello David,

we aren't the core developers of GlusterFS, but we are
developing a new translator that will be able to implement something
similar to a RAID6. In fact it will be able to have a configurable level
of redundacy. A redundancy of 1 is equivalent to RAID 5; a redundancy of
2 is equivalent to RAID 6; and higher levels of redundancy are
supported.

We are also trying to improve performance over replicate by
using a new contention detection and locking mecanism, but no promises
about that yet.

We plan to begin internal tests soon. When we consider
it stable, we will release a first beta.

Xavi

On 29.03.2012 17:14,
Pascal wrote: 

> Am Thu, 29 Mar 2012 11:02:38 -0400
> schrieb David
Coulson <david at davidcoulson.net>:
> 
> Sorry for confusion, I understood
you wrong in the first place. Now I
> guess I know what you mean and I
will think about it. 
> 
> Are there more suggestions or official plans
from the GlusterFS
> developers?
> 
>> Not following. If you have a
replica count of 3, you can lose two boxes in that group and still have
access to all your data. It's more like a 3-way RAID-1 than anything
like RAID-6. On 3/29/12 11:00 AM, Pascal wrote: 
>> 
>>> Am Thu, 29 Mar
2012 10:47:38 -0400 schrieb David Coulson<david at davidcoulson.net [6]>:
Hello David, thanks for your quick reply. I already considered a replica
count of 3 (and six servers at all, correct?), but the problem would
still be that two hard drives from the same "replica group" were not
allowed to fail at the same time. 
>>> 
>>>> Try doing a
distributed-replica with a replica count of 3. Not really 'RAID-6'
comparable, but you can have two nodes fail without outage.
http://download.gluster.com/pub/gluster/glusterfs/3.2/Documentation/AG/html/sect-Administration_Guide--Setting_Volumes-Distributed_Replicated.html
[5]On 3/29/12 10:39 AM, Pascal wrote: 
>>>> 
>>>>> Hello everyone, I
would like to know if it is possible to setup a GlusterFS installation
which is comparable to a RAID 6? I did some research in the community
and several mailing lists and all I could find were the similar request
from 2009
(http://gluster.org/pipermail/gluster-users/2009-May/002208.html [1],
http://www.gluster.org/community/documentation/index.ph/Talk:GlusterFS_Roadmap_Suggestions
[2]). I would just like to have a scenario where two GlusterFS
nodes/servers, respectively their hard drives, could fail at the same
time. Thanks in advance! Pascal
_______________________________________________ Gluster-devel mailing
list Gluster-devel at nongnu.org [3]
https://lists.nongnu.org/mailman/listinfo/gluster-devel [4]
>>>
_______________________________________________ Gluster-devel mailing
list Gluster-devel at nongnu.org [7]
https://lists.nongnu.org/mailman/listinfo/gluster-devel [8]
> 
>
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Links:
------
[1]
http://gluster.org/pipermail/gluster-users/2009-May/002208.html
[2]
http://www.gluster.org/community/documentation/index.ph/Talk:GlusterFS_Roadmap_Suggestions
[3]
mailto:Gluster-devel at nongnu.org
[4]
https://lists.nongnu.org/mailman/listinfo/gluster-devel
[5]
http://download.gluster.com/pub/gluster/glusterfs/3.2/Documentation/AG/html/sect-Administration_Guide--Setting_Volumes-Distributed_Replicated.html
[6]
mailto:david at davidcoulson.net
[7] mailto:Gluster-devel at nongnu.org
[8]
https://lists.nongnu.org/mailman/listinfo/gluster-devel
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