Re: disperse volume and its relation to xlators/cluster/ec

[Pranith Kumar Karampuri <pkarampu@xxxxxxxxxx>]

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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