Hi all, Here is how I see it and explain to others that are not too familiar with Solr: Solr comes in two flavours - Cloud and Standalone. In any mode Solr writes to primary core(s). There is option to have different types of replicas, but in Standalone mode one can only have pull replica. In addition to different types of replicas, in SolrCloud mode multiple cores can be shards of a singe collection and primary is not fixed.
Emir -- Monitoring - Log Management - Alerting - Anomaly Detection Solr & Elasticsearch Consulting Support Training - http://sematext.com/ > On 24 Jun 2020, at 15:19, Mark H. Wood <mw...@iupui.edu> wrote: > > On Wed, Jun 24, 2020 at 12:45:25PM +0200, Jan Høydahl wrote: >> Master/slave and standalone are used interchangably to mean zk-less Solr. I >> have a feeling that master/slave is the more popular of the two, but >> personally I have been using both. > > I've been trying to stay quiet and let the new-terminology issue > settle, but I had a thought. Someone has already pointed out that the > so-called master/slave cluster is misnamed: the so-called "master" > node doesn't order the "slaves" about and indeed has no notion of > being a master in any sense. It acts as a servant to the "slave" > nodes, which are in charge of keeping themselves updated. > > So, it's kind of odd, but I could get used to calling this mode a > "client/server cluster". > > That leaves the question of what to call Solr Cloud mode, in which no > node is permanently special. I could see calling it a "herd" or > suchlike. > > Now I'll try to shut up again. :-) > > -- > Mark H. Wood > Lead Technology Analyst > > University Library > Indiana University - Purdue University Indianapolis > 755 W. Michigan Street > Indianapolis, IN 46202 > 317-274-0749 > www.ulib.iupui.edu
