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https://issues.apache.org/jira/browse/SOLR-13035?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16706480#comment-16706480
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Shawn Heisey commented on SOLR-13035:
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My current opinion: The solr.data.home parameter is an expert option. if you
want to change where Solr writes its data, just change the solr home
(solr.solr.home property, -s option on the bin/solr script) -- both the core
instanceDirs and the dataDirs will be under that location.
The only reason to define solr.data.home is to put instanceDir and dataDir
definitions in different places without having to manually edit core.properties
files to set dataDir. Expert users might have reason to separate core configs
from core data ... but I don't think typical users need it. Also, that
separation is readily achieved by running in SolrCloud mode.
To solve issues for the docker images, we need to have the ability for Solr to
start when solr.xml is missing. If we have that, then the docker image can
mount an empty location for the solr home, and Solr will start. Then the user
has the option of adding a solr.xml file if they want to change config options
controlled by that file.
> Utilize solr.data.home / solrDataHome in solr.xml to set all writable files
> in single directory
> -----------------------------------------------------------------------------------------------
>
> Key: SOLR-13035
> URL: https://issues.apache.org/jira/browse/SOLR-13035
> Project: Solr
> Issue Type: Improvement
> Security Level: Public(Default Security Level. Issues are Public)
> Reporter: Amrit Sarkar
> Priority: Major
> Attachments: SOLR-13035.patch
>
>
> {{solr.data.home}} system property or {{solrDataHome}} in _solr.xml_ is
> already available as per SOLR-6671.
> The writable content in Solr are index files, core properties, and ZK data if
> embedded zookeeper is also started in SolrCloud mode. It would be great if
> all writable content can come under the same directory.
> It can then also solve official docker Solr image issues:
> https://github.com/docker-solr/docker-solr/issues/74
> https://github.com/docker-solr/docker-solr/issues/133
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