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https://issues.apache.org/jira/browse/SOLR-6671?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14189823#comment-14189823
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Jan Høydahl commented on SOLR-6671:
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Hmm, perhaps better to do this as part of {{DirectoryFactory#getDataHome}} and
add a setting inside {{<directoryFactory>}} tag in solrconfig (data.home is a
naming more in line with existing stuff):
{code:xml}
<str name="solr.data.home">${solr.data.home:}</str>
{code}
This way, each directory impl can have a say in what a data root means.
> Introduce a solr.data.root as root dir for all data
> ---------------------------------------------------
>
> Key: SOLR-6671
> URL: https://issues.apache.org/jira/browse/SOLR-6671
> Project: Solr
> Issue Type: Bug
> Components: SolrCloud
> Affects Versions: 4.10.1
> Reporter: Jan Høydahl
> Fix For: 5.0, Trunk
>
>
> Many users prefer to deploy code, config and data on separate disk locations,
> so the default of placing the indexes under
> {{$\{solr.solr.home\}/$\{solr.core.name\}/data}} is not always wanted.
> In a multi-core/collection system, there is not much help in the
> {{solr.data.dir}} option, as it would set the {{dataDir}} to the same folder
> for all collections. One workaround, if you don't want to hardcode paths in
> your {{solrconfig.xml}}, is to specify the {{dataDir}} property in each
> {{solr.properties}} file.
> A more elegant solution would be to introduce a new Java-option
> {{solr.data.root}} which would be to data the same as {{solr.solr.home}} is
> for config. If set, all collections would default their {{dataDir}} as
> {{$\{solr.data.root\)/$\{solr.core.name\}/data}}
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