Thanks a lot Shawn. This answers my question really well! On Thu, Jan 13, 2022 at 2:17 PM Shawn Heisey <apa...@elyograg.org> wrote:
> On 1/11/2022 7:01 PM, Ashwin Ramesh wrote: > > 1. Does the local node/core download the config (schema etc.) & solr.xml > > from ZK? If so, where would the files exist? (I can't seem to locate it > in > > my local running instance). > > The files are not downloaded. Solr pulls them from zookeeper and uses > them directly. I really doubt that the files obtained are ever saved to > the local disk. > > > 2. When I issue a RELOAD command, what does SolrCloud and the underlying > > nodes in a collection actually do? > > If you issue a RELOAD with the collections API, Solr will ask each shard > replica in the collection to reload. > > If you issue a RELOAD with CoreAdmin on a single core, I am actually not > sure whether Solr would magnify that to the rest of the cores in the > collection. Hopefully it won't. I do not have access to a SolrCloud > install to try this. FYI: Using the CoreAdmin API for ANYTHING is > strongly discouraged when Solr is in cloud mode. > > > 3. If we change the solr.xml file and upload the new version to the root > > directory of the ZK path for the given cluster, will a RELOAD command > > update the configuration for all running nodes? > > The solr.xml file contains configuration for the node as a whole. > Reloading will not make changes take effect. After changing solr.xml in > ZK you will need to completely restart each Solr instance connected to > that zookeeper ensemble. When it starts, it check for the existence of > solr.xml in ZK. If it finds it there, it will pull solr.xml from > zookeeper to configure itself. If it doesn't find solr.xml in zookeeper > then it will look for it in the solr home. I'm fairly sure that if it's > not found in either location, the Solr versions I have used will not > start. If that's still the case, I think it's a bug. > > Thanks, > Shawn > -- ** ** <https://www.canva.com/>Empowering the world to design Share accurate information on COVID-19 and spread messages of support to your community. Here are some resources <https://about.canva.com/coronavirus-awareness-collection/?utm_medium=pr&utm_source=news&utm_campaign=covid19_templates> that can help. <https://twitter.com/canva> <https://facebook.com/canva> <https://au.linkedin.com/company/canva> <https://twitter.com/canva> <https://facebook.com/canva> <https://au.linkedin.com/company/canva> <https://instagram.com/canva>
