Hi Walter,
it's not a problem to take down zk for a short (1h) time and
reconfigure it. Meanwhile solr would go in readonly mode.
I'd like feedback on the fastest way to do this. Would it work to just
reconfigure the cluster with other 2 empty zk nodes? Would they correctly
sync from the nonempty one? Should first copy data from zk3 to the two
empty zk?
Matteo
2015-10-29 18:34 GMT+01:00 Walter Underwood <wun...@wunderwood.org>:
> You can't. Zookeeper needs a majority. One node is not a majority of a
> three node ensemble.
>
> There is no way to split a Solr Cloud cluster across two datacenters and
> have high availability. You can do that with three datacenters.
>
> You can probably bring up a new Zookeeper ensemble and configure the Solr
> cluster to talk to it.
>
> wunder
> Walter Underwood
> wun...@wunderwood.org
> http://observer.wunderwood.org/ (my blog)
>
>
> > On Oct 29, 2015, at 10:08 AM, Matteo Grolla <matteo.gro...@gmail.com>
> wrote:
> >
> > I'm designing a solr cloud installation where nodes from a single cluster
> > are distributed on 2 datacenters which are close and very well connected.
> > let's say that zk nodes zk1, zk2 are on DC1 and zk2 is on DC2 and let's
> say
> > that DC1 goes down and the cluster is left with zk3.
> > how can I restore a zk quorum from this situation?
> >
> > thanks
>
>
