The rules suggested by Steve is correct. I tested it locally and I got the same errors. That means a bug exists probably. All the new development efforts are invested in the new policy feature .https://lucene.apache.org/solr/guide/7_4/solrcloud-autoscaling-policy-preferences.html
The old one is going to be deprecated pretty soon. So, I'm not sure if we should be investing our resources here On Wed, Sep 26, 2018 at 1:23 PM Chuck Reynolds <creyno...@ancestry.com> wrote: > > Shawn, > > Thanks for the info. We’ve been running this way for the past 4 years. > > We were running on very large hardware, 20 physical cores with 256 gigs of > ram with 3 billion document and it was the only way we could take advantage > of the hardware. > > Running 1 Solr instance per server never gave us the throughput we needed. > > So I somewhat disagree with your statement because our test proved otherwise. > > Thanks for the info. > > Sent from my iPhone > > > On Sep 25, 2018, at 4:19 PM, Shawn Heisey <apa...@elyograg.org> wrote: > > > >> On 9/25/2018 9:21 AM, Chuck Reynolds wrote: > >> Each server has three instances of Solr running on it so every instance on > >> the server has to be in the same replica set. > > > > You should be running exactly one Solr instance per server. When > > evaluating rules for replica placement, SolrCloud will treat each instance > > as completely separate from all others, including others on the same > > machine. It will not know that those three instances are on the same > > machine. One Solr instance can handle MANY indexes. > > > > There is only ONE situation where it makes sense to run multiple instances > > per machine, and in my strong opinion, even that situation should not be > > handled with multiple instances. That situation is this: When running one > > instance would require a REALLY large heap. Garbage collection pauses can > > become extreme in that situation, so some people will run multiple > > instances that each have a smaller heap, and divide their indexes between > > them. In my opinion, when you have enough index data on an instance that it > > requires a huge heap, instead of running two or more instances on one > > server, it's time to add more servers. > > > > Thanks, > > Shawn > > -- ----------------------------------------------------- Noble Paul
