#solr multicore

Download Solr 1.4.1 from a mirror: http://www.apache.org/dyn/closer.cgi/lucene/solr/

Download the Apache Solr Drupal module and unzip wherever you put your Drupal modules.

For Drupal 6.x-1.x, download the Solr PHP Client library (http://code.google.com/p/solr-php-client/downloads/list) and unpack it so it is under the apachesolr module directory as SolrPhpClient (i.e. sites/all/modules/apachesolr/SolrPhpClient).

Unpack the tarball OUTSIDE OF THE WEB ROOT.  This will create a folder called "apache-solr-1.4.1".

Make a copy of the "example" directory found in the "apache-solr-1.4.1" directory; call it "drupal".

Go to "apache-solr-1.4.1/drupal/solr/conf" and rename schema.xml and solrconfig.xml.  Add a .bak to the end or something.

Go to where you unzipped the Solr Module.  Copy "schema.xml" and "solrconfig.xml" to "apache-solr-1.4.1/drupal/solr/conf"

Delete the following directories.  They're just in the way: - example-DIH - exampleAnalysis - exampledocs - work

Copy "drupal/multicore/solr.xml" to "drupal/solr/solr.xml" 

Delete the "drupal/multicore" directory.

Now create directories within the "drupal/solr" directory for each site you want to use Solr with.  For example, if I had two sites "anovasolutions.com" and "myrandomideas.com" and I wanted to use Solr with them both, I might create the following directories: drupal/solr/site_anovasolutions drupal/solr/site_myrandomideas

Copy the "drupal/solr/conf" directory into each directory you just created. When you're done each site's directory should have a copy of "conf" in them.

Now alter the solr.xml file you copied over to list both sites.  So your solr.xml would look like this:

<?xml version="1.0" encoding="UTF-8" ?> <solr persistent="false"> <cores adminPath="/admin/cores">   <core name="anovasolutions" instanceDir="site_anovasolutions" />   <core name="myrandomideas" instanceDir="site_myrandomideas" /> </cores> </solr>

Now fire up the Jetty servlet container from the command line in the drupal directory with: "java -jar start.jar"

Enable the "Apache Solr framework" and "Apache Solr search" modules. Also, enable the core Drupal Search module if you haven't already. Do this for both sites.

Navigate to the Solr Settings page for each site (?q=admin/config/search/apachesolr/settings/solr/edit). - Solr host name: localhost - Solr port: 8983 - Solr path for anovasoutions.com: /solr/anovasolutions - Solr path for myrandomideas.com: /solr/myrandomideas - Number of items to index per cron run: I always set this to 200. - Enable spellchecker and suggestions: Check that...it's sweet! Now we go to the edit setting of solr server: change from http://127.0.0.1:8983/solr to http://127.0.0.1:8983/solr/anovasolutions

Click "Save Configuration."  The first time around it'll probably tell you it can't reach the server, but if you refresh the page you'll be good to go.  

Note that you're going to have to start Solr every time you reboot the machine.  Windows users, set up a scheduled task.  *nix/Mac users, follow these instructions.  There's a great walkthrough there as well.

Check out admin/blocks.  You'll see a bunch of new blocks related to Solr.  I'd just activate all of these so you can get an idea of what you're dealing with.