Dear Xavi,
How
is the data fragmented ? what if a file
size is more than
the fragment size? Can a fragment have data corresponding to 2 or more
files ?
How the
data is accessed basically ( file open ?)
? What is a frame ?
I have searched a lot of documents about glusterFS. None of these are helpful to understand the glusterFS in detail (from the perspective of writing a new translator),
Jeff Darcy's tutorial was helpful though.
Perhaps, am I missing something?
Can you point to some good stuffs ?
Best Regards
JK
On Wed, Feb 17, 2016 at 4:24 PM, jayakrishnan mm <jayakrishnan.mm@xxxxxxxxx> wrote:
Dear Xavi,Thanks a lot. That clarified my confusion.Best RegardsJKOn Wed, Feb 17, 2016 at 3:35 PM, Xavier Hernandez <xhernandez@xxxxxxxxxx> wrote:Hi jayakrishnan,
the old implementation was not finally accepted to be included in main glusterfs tree, so it was rewritten in what now is known as ec.
disperse is an alias for ec. They are the same. The algorithm implemented is Reed-Solomon. It's really similar to ida (we could say that ida is a specific implementation of a Reed-Solomon code).
Almost all basic functionality in old code is implemented in new ec in some way, though not using the same approaches. Anyway the latest implementation is way more stable and maintained, while the old code has been abandoned and should not be used.
Regards,
Xavi
On 17/02/16 05:12, 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
Best Regards
JK
_______________________________________________ Gluster-users mailing list Gluster-users@xxxxxxxxxxx http://www.gluster.org/mailman/listinfo/gluster-users
