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From "Erick Erickson (JIRA)" <j...@apache.org>
Subject [jira] [Created] (SOLR-4478) Allow cores to specify a named config set
Date Wed, 20 Feb 2013 16:11:17 GMT
Erick Erickson created SOLR-4478:
------------------------------------

             Summary: Allow cores to specify a named config set
                 Key: SOLR-4478
                 URL: https://issues.apache.org/jira/browse/SOLR-4478
             Project: Solr
          Issue Type: Improvement
    Affects Versions: 4.2, 5.0
            Reporter: Erick Erickson
            Assignee: Erick Erickson


Part of moving forward to "the new way", after SOLR-4196 etc... I propose an additional parameter
specified on the <core> node in solr.xml or as a parameter in the "discovery" mode core.properties
file, call it configSet, where the value provided is a path to a directory, either absolute
or relative. Really, this is as though you copied the conf directory somewhere to be used
by more than one core.

Straw-man: There will be a directory <solr_home>/configsets which will be the default.
If the configSet parameter is, say, "myconf", then I'd expect a directory named "myconf" to
exist in <solr_home>/configsets, which would look something like
<solr_home>/configsets/myconf/schema.xml
                              solrconfig.xml
                              stopwords.txt
                              velocity
                              velocity/query.vm

etc.

If multiple cores used the same configSet, schema, solrconfig etc. would all be shared (i.e.
shareSchema="true" would be assumed). I don't see a good use-case for _not_ sharing schemas,
so I don't propose to allow this to be turned off. Hmmm, what if shareSchema is explicitly
set to false in the solr.xml or properties file? I'd guess it should be honored but maybe
log a warning?

Mostly I'm putting this up for comments. I know that there are already thoughts about how
this all should work floating around, so before I start any work on this I thought I'd at
least get an idea of whether this is the way people are thinking about going.

Configset can be either a relative or absolute path, if relative it's assumed to be relative
to <solr_home>.

Thoughts?

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