Good point on the chroot - I used one and at one point I had 3 different
versions of Solr running on 9 VMs - nary a problem...

Sputul, the chroot "instructions" are in my notes...  look for something
like "...../solr6.1" in the notes and you'll see what I mean...

On Tue, Oct 18, 2016 at 2:05 PM, Shawn Heisey <> wrote:

> On 10/18/2016 12:28 PM, John Bickerstaff wrote:
> > For what it's worth, (and it may not work for your situation) I
> > decided not to upgrade, but to "upgrade by replacing". In other words,
> > I just installed 6.x and because I had set up my configs for "include"
> > I didn't have to worry about what would be different about the "new"
> > solrconfig.xml and the managed_schema file. Instead, I was able to use
> > a copy from one of the sample projects and add my "included" configs.
> John's way is the way that I would recommend doing it.  If you utilize a
> chroot, you can even use the same zookeeper ensemble for the new cloud,
> it will just go in a different location in the database. SolrCloud
> evolves very quickly, so trying to use an existing zookeeper database
> may result in less than optimal operation.  Solr itself doesn't evolve
> nearly as fast, but if you go to 6.x, you're going to jump two major
> versions -- even for Solr, that's a LOT of change.
> > By the way - unless I misunderstand the Zookeeper docs, you can't get
> > away with any less than 3 Zookeeper nodes. So keep that in mind.
> This is 100% correct.  If you want zookeeper redundancy, you must have
> at least 3 zookeeper servers.  This is clear in the zookeeper
> documentation.
> > I have my rough notes about what I did available online. You can go
> > here for the link...
> >
> zookeeper-nodes-john-bickerstaff
> I haven't gone over these notes, but if they work, awesome.
> Regarding the latest question on the thread, there is no magic "reindex"
> button:
> Thanks,
> Shawn

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