>From my experience, you need all nodes to have access to the shared storage. Solr will pick which nodes should write each shard's data, and you do not have a lot of control over which nodes are selected. This is why in the documentation it says that the backup must be written to NFS or HDFS. Solr won't try to retrieve the other replicas over the network.
I think you will actually get an error back when not every node is able to see the path where the backup should be written. But even if you don't receive an error, the backup will not work. - Houston On Thu, Feb 20, 2020 at 11:26 AM Koen De Groote <koen.degro...@limecraft.com> wrote: > Hello all, > > I've recently set up backups, using solr 7.6 > > My setup has 3 replicas per collection and several collections. Not all > collections or replicas are present on all hosts. > > That being said, I run the backup command from 1 particular host and only > that host has access to the mount on which the backup data will be written. > > This means that the host writing the backup data doesn't have all the data > on its local filesystem. > > Is this a problem? > > By which I mean: will data not present on that host be retrieved over the > network? > > What happens in this case? > > Kind regards, > Koen De Groote >
