https://lucene.apache.org/solr/guide/6_6/configuring-solrconfig-xml.html
This page has a section about parameter substitution in config via command line
overrides.
-Original message-
> From:Ganesh Sethuraman
> Sent: Wednesday 27th June 2018 1:06
> To: solr-user@lucene.apache.org
> Subject: Change/Override Solrconfig.xml across collections
>
> I would like to implement the Slow Query logging feature (
> https://lucene.apache.org/solr/guide/6_6/configuring-logging.html#ConfiguringLogging-LoggingSlowQueries)
> across multiple collection without changing solrconfig.xml in each and
> every collection. Is that possible? I am using solr 7.2.1
>
> If this is not possible, is it possible to update only the solrconfig.xml
> into zookeeper for each collection, without the schema update? i have both
> schema and solrconfig.xml in the same directory
>
> Regards
> Ganesh
>
