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

[Xavier Hernandez]

Sorry, the previous message was intended for Pascal.

Xavi

On
30.03.2012 08:29, Xavier Hernandez wrote: 

> 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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