[Gluster-users] disperse volume and its relation to xlators/cluster/ec

[jayakrishnan mm]

Dear  Pranith,

Thanks for the  reply. So GlusterFS 3.7.6 (which is the  version I am
using) already  contains full   disperse  volume  functionality in it ?
But  where  is the IDA  implementation  ?

Best Regards
JK

On Wed, Feb 17, 2016 at 1:23 PM, Pranith Kumar Karampuri <
pkarampu at redhat.com> wrote:

>
>
> On 02/17/2016 09:42 AM, jayakrishnan mm wrote:
>
> Dear  Xavier,
>
> I am trying to understand the disperse  translator  and its  usage.
>
> From
> https://lists.gnu.org/archive/html/gluster-devel/2014-01/txttzloLYIJOh.txt
> , I see  there  are  four  components namely gfsys,dfc,ida  and  heal
> which needs  to  be  compiled  with GlusterFS main source code.
> I am  confused  this with xlator/cluster/ec.   What is the relationship
> between this  and  the disperse volume components  mentioned  earlier ?
>  Is   xlator/cluster/ec  is  erasure coding (ec) translator
> implementation  in glusterFS ? If yes, which algorithm it implements ? ( I
> know  disperse  volume implements IDA)
> Pls. help
>
>
> hi Jayakrishnan,
>         While Xavi replies to this mail, here are my inputs. I am not very
> familiar with the old code because I didn't get a chance to look at them
> deeply. But I do know about dfc. All the code of disperse volume is in
> 'xlators/cluster/ec'. At the moment EC is using synchronization similar to
> afr for now, so dfc is not in upstream yet. Heal in ec is also changed
> similar to afr and is done automatically by glustershd, so the
> functionality of 'heal' I think is implemented in ec-heal.c(Healing),
> ec-heald.c (automatic healing part). Did I get that right Xavi?
>
> Pranith
>
>
> Best Regards
> JK
>
>
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>
>
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