The baby step that Jan is proposing for a ‘zookeeper’ node-role makes sense to me, for those who are only deploying a very small Solr setup.
What would that look like? Would you start your solr like this? I looked a bit at the Ref Guide page for Nodes, and I’m gathering it might look like: One Solr with what we call Embedded ZK today: bin/solr start -c The -c switch and no -z parameter means it has an implicit Zookeeper Role and therefore fires up an embedded ZK. The Same Thing Explicitly: bin/solr start -c -solr.node.roles=zookeeper:on -z localhost:9983 So, what about two Solr nodes? bin/solr start -c -solr.node.roles=zookeeper:on -z localhost:9983 -p 8983 bin/solr start -c -z localhost:9983 -p 7574 And Four Solr Nodes with 3 enabled for ZK? bin/solr start -c -solr.node.roles=zookeeper:on -z localhost:9983,localhost:8574,localhost:9984 -p 8983 bin/solr start -c -solr.node.roles=zookeeper:on -z localhost:9983,localhost:8574,localhost:9984 -p 7574 bin/solr start -c -solr.node.roles=zookeeper:on -z localhost:9983,localhost:8574,localhost:9984 -p 8984 bin/solr start -c -z localhost:9983,localhost:8574,localhost:9984 -p 7574 At least on the face of it, this doesn’t seem to far away…. I’m sure there is a lot of complexity that I don’t realize about ;-). Like, will Solr start up if one of the three ZK it’s wants isn’t yet available? Eric > On Sep 6, 2023, at 6:14 PM, Jan Høydahl <jan....@cominvent.com> wrote: > > Hi, > > Eric Pugh and I discussed this SIP the other day, as a stepping stone for > making cloud mode the default. Perhaps there is new energy for this two years > down the road? > > We don't need to tackle the full dynamic scaling of ZK on day one. > Just adding a 'zookeeper' node-role so we could have tree fixed nodes acting > as ZK would be a win and lower the complexity of deploying Solr. > We could always add magic auto scaling later. > > Jan > >> 17. jan. 2022 kl. 06:57 skrev Mark Miller <markrmil...@gmail.com>: >> >> Yeah, there two reasons we didn’t push embedded Zookeeper out of the gate >> and even went so far as to call it a non production “demo” feature. Dynamic >> reconfiguration as a cluster changed over time, and a Zookeeper instance per >> Solr node being prohibitive. At least the latter was theoretical externally >> solvable it felt, but at the time, that just brought back around to the lack >> of dynamic configuration. > > > --------------------------------------------------------------------- > To unsubscribe, e-mail: dev-unsubscr...@solr.apache.org > For additional commands, e-mail: dev-h...@solr.apache.org > _______________________ Eric Pugh | Founder & CEO | OpenSource Connections, LLC | 434.466.1467 | http://www.opensourceconnections.com <http://www.opensourceconnections.com/> | My Free/Busy <http://tinyurl.com/eric-cal> Co-Author: Apache Solr Enterprise Search Server, 3rd Ed <https://www.packtpub.com/big-data-and-business-intelligence/apache-solr-enterprise-search-server-third-edition-raw> This e-mail and all contents, including attachments, is considered to be Company Confidential unless explicitly stated otherwise, regardless of whether attachments are marked as such.
