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https://issues.apache.org/jira/browse/SOLR-6671?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15180716#comment-15180716
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Jan Høydahl commented on SOLR-6671:
-----------------------------------
bq. What determines the name of the dataDir? Is it the core name, or is the
last path component of the instanceDir?
Here's the code:
{code}
dataDir =
Paths.get(cd.getCoreContainer().getSolrHome()).resolve(dataHomePath).resolve(cd.getName()
+ File.separator + cd.getDataDir()).toAbsolutePath().toString();
{code}
So you will typically see
{{/path/to/solr.data.dir/collname_shard1_replica1/data/}}, but in your example,
it would probably be {{/path/to/solr.data.dir/s0live/s0_1/}}. I had to include
core name as one level so we don't end up with all "data" folders in the same
root dir. Guess I see a bug right there - we need to support absolute path
{{dataDir}} which would override the {{solr.data.home}}.
> Introduce a solr.data.home as root dir for all data
> ---------------------------------------------------
>
> Key: SOLR-6671
> URL: https://issues.apache.org/jira/browse/SOLR-6671
> Project: Solr
> Issue Type: New Feature
> Components: SolrCloud
> Affects Versions: 4.10.1
> Reporter: Jan Høydahl
> Assignee: Jan Høydahl
> Fix For: 5.2, master
>
> Attachments: SOLR-6671.patch, SOLR-6671.patch
>
>
> 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.home}} 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.home\)/$\{solr.core.name\}/data}}
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