Each shard is a separate file of size equal to value of
"features.shard-block-size".
So when a brick/node was down, only those shards belonging to the VM that
were modified will be sync'd later when the brick's back up.
Does that answer your question?

-Krutika

On Wed, Mar 27, 2019 at 7:48 PM Sahina Bose <sab...@redhat.com> wrote:

> On Wed, Mar 27, 2019 at 7:40 PM Indivar Nair <indivar.n...@techterra.in>
> wrote:
> >
> > Hi Strahil,
> >
> > Ok. Looks like sharding should make the resyncs faster.
> >
> > I searched for more info on it, but couldn't find much.
> > I believe it will still have to compare each shard to determine whether
> there are any changes that need to be replicated.
> > Am I right?
>
> +Krutika Dhananjay
> >
> > Regards,
> >
> > Indivar Nair
> >
> >
> >
> > On Wed, Mar 27, 2019 at 4:34 PM Strahil <hunter86...@yahoo.com> wrote:
> >>
> >> By default ovirt uses 'sharding' which splits the files into logical
> chunks. This greatly reduces healing time, as VM's disk is not always
> completely overwritten and only the shards that are different will be
> healed.
> >>
> >> Maybe you should change the default shard size.
> >>
> >> Best Regards,
> >> Strahil Nikolov
> >>
> >> On Mar 27, 2019 08:24, Indivar Nair <indivar.n...@techterra.in> wrote:
> >>
> >> Hi All,
> >>
> >> We are planning a 2 + 1 arbitrated mirrored Gluster setup.
> >> We would have around 50 - 60 VMs, with an average 500GB disk size.
> >>
> >> Now in case one of the Gluster Nodes go completely out of sync,
> roughly, how long would it take to resync? (as per your experience)
> >> Will it impact the working of VMs in any way?
> >> Is there anything to be taken care of, in advance, to prepare for such
> a situation?
> >>
> >> Regards,
> >>
> >>
> >> Indivar Nair
> >>
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