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

[Pascal]

Hello Xavier,

it sounds pretty interesting to me. 
Will you publish any news on this mailing list or is there another
place where I can update my self about your progress?

Am Fri, 30 Mar 2012 08:33:37 +0200
schrieb Xavier Hernandez
<address@hidden>:

> 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 <address@hidden>:
> >> 
> >> 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<address@hidden [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
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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:address@hidden
> [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:address@hidden
> [7] mailto:address@hidden
> [8]
> https://lists.nongnu.org/mailman/listinfo/gluster-devel
>