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[Moritz Krinke <mkrinke@xxxxxxxxxxxxxxxxx>]

Micheal,

thanks for your hints and explanations!

Regards,
Moritz

2012/10/8 Michael Barton <mike-launchpad@xxxxxxxxxxxxxxxx>

> On Mon, Oct 8, 2012 at 8:12 AM, Moritz Krinke <mkrinke@xxxxxxxxxxxxxxxxx>
> wrote:
> > - I cannot change the number of replicas after creating the ring (e.g.
> > changing it from 1 to 2)
>
> Not really.  Logically it's not a difficult operation, there's just no
> code to do it.  There was a patch a while back, but I guess it wasn't
> ever approved:
>
> https://review.openstack.org/#/c/5484/
>
> > - reading about the "unique-as-possible" feature in folsom im asking
> myself
> > how would swift know if nodes are in different places, is there a feature
> > like "regions" i am not aware of?
>
> There's no concept of regions (yet).  The commit message is pretty
> descriptive:
>
>
> https://github.com/openstack/swift/commit/bb509dd863dc99c06a232d1d8e0f950a7e73dcc8
>
> > - after migration of data and having two replicas spread over those two
> > nodes, how can i make sure that in the event of a node beeing down swift
> > will not start copying files to second drives on the healty nodes?
>
> Swift won't over-replicate when a node's down, only when an individual
> drive is unmounted.  There's no way to disable over-replication in
> that case, though.
>
> - Michael