Creating collections in SOLR

java solr solrj
cljk picture cljk · Oct 25, 2012 · Viewed 21k times · Source

On the web searching for collections in SOLR i found only information about distributed search and so on but when I understand the concept of correclty collections are running on the same server instance using the same schema but are logically completely separated. Is this correct? So I can have 3 collections and searching on one collection won´t output results of another right? Would it be possible to search on more than one collection at once?

But my main priority: How do I create a second collection? Even a link to a good doc would be appreciated. In my solr.xml i have

  <cores adminPath="/admin/cores" defaultCoreName="web-collection" host="${host:}" hostPort="${jetty.port:}">
    <core name="web-collection" instanceDir="." />
  </cores>

Would it be sufficient to create a second core-entry and set different paths? like...

  <cores adminPath="/admin/cores" defaultCoreName="web-collection" host="${host:}" hostPort="${jetty.port:}">
    <core name="web-collection" instanceDir="web" />
    <core name="test-collection" instanceDir="test" />
  </cores>

What is the instanceDir about? Is it the index-directory relative to SOLR-Home?

Answer

javanna picture javanna · Oct 25, 2012

You can use multiple cores. Each core is a separate lucene index.
instanceDir is the location of the configuration files for that specific core, the folder that contains the conf directory, which contains schema.xml and solrconfig.xml among others. You usually have a subfolder per core where the solr.xml is (SOLR_HOME) and use relative paths to refer to them within the solr.xml itself.

Related questions

Exception in thread "main" java.lang.NoClassDefFoundError: org/apache/commons/codec/DecoderException

I try Querying Solr via Solrj Here is my code public class ReadFromSolr { public static void main(String[] args) throws MalformedURLException, SolrServerException { String url = "http://localhost:8983/solr"; try{ SolrServer server = new CommonsHttpSolrServer(url); ModifiableSolrParams params = new ModifiableSolrParams(); params.set("qt", "/…

Read More
How to write a solr query for retrieving all records with numeric field value less then specified?

Let's assume we have a set of mp3-players with names and prices. How to write a correct solr query for finding all goods with a certain name and with price less then 100$? q = "(name:(ipod) AND price ???? 100.0)"

Read More
Indexing documents using Solr results in Expected mime type application/octet-stream but got text/html

What I am trying to do is to index document using Solr. I have installed and started Solr server on a Windows environment and I am trying to index using SolrJ. However when I try to add the solr document …

Read More