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https://issues.apache.org/jira/browse/SOLR-11508?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16277497#comment-16277497
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David Smiley commented on SOLR-11508:
-------------------------------------
Perhaps solr.data.dir should be deprecated in SolrCloud mode (displaying a
warning at startup)? In 8.0 we could remove the "-t" convenience parameter to
bin/solr, leaving it as more of an internal setting.
> Make coreRootDirectory configurable via an environment variable
> (SOLR_CORE_HOME)
> --------------------------------------------------------------------------------
>
> Key: SOLR-11508
> URL: https://issues.apache.org/jira/browse/SOLR-11508
> Project: Solr
> Issue Type: Bug
> Security Level: Public(Default Security Level. Issues are Public)
> Reporter: Marc Morissette
>
> (Heavily edited)
> Since Solr 7, it is possible to store Solr cores in separate disk locations
> using solr.data.home (see SOLR-6671). This is very useful when running Solr
> in Docker where data must be stored in a directory which is independent from
> the rest of the container.
> While this works well in standalone mode, it doesn't in Cloud mode as the
> core.properties automatically created by Solr are still stored in
> coreRootDirectory and cores created that way disappear when the Solr Docker
> container is redeployed.
> The solution is to configure coreRootDirectory to an empty directory that can
> be mounted outside the Docker container.
> The incoming patch makes this easier to do by allowing coreRootDirectory to
> be configured via a solr.core.home system property and SOLR_CORE_HOME
> environment variable.
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