Hi, I would like to be certain to understand how Solr use Zookeeper and more precisely when Solr write into Zookeeper.
Solr stores various informations in ZK - globale configuration (autoscaling, security.json) - collection configuration (configs) - collections state (state.json, leaders, ...) - nodes state (live_nodes, overseer) Writes in Zk occur when - a zookeeper member start or stop - a solr node start or stop - a configuration is loaded - a collection is created, deleted or updated (nearly all call to collection, core or config API) Write do not occur during - SolrJ client creation - indexing data (Solrj, HTTP, DIH, ...) - searching (Solrj, HTTP) In conclusion, if Solr nodes are stable (no failure, no maintenance), no calls to collection, core or config API are done, so there is nearly no writes to ZK. Is it correct ? Regards Dominique
