In order to activate the archiving function go to the following location:

...(root of your eZ Publish  installation)/extension/ezfind/settings/ezfind.ini

In your ezfind.ini enable Solr attribute storage like this:

[IndexOptions]
EnableSolrAttributeStorage=true

Next re-index the installation with this command:

$php extension/ezfind/bin/php/updatesearchindexsolr.php -s <admin  site access>

Keep in mind that you must change <admin site access> with your admin site access.

Then go to your solr.ini, which is located here:

...(root  of your eZ Publish installation)/extension/ezfind/settings/solr.ini

Edit this file by adding a new shard definition, like this:

Shards[]
Shards[archive]=<location Solr archive>

The default setting is Shards[archive]=http://localhost:8984/solr/admin

Example setup

An easy example of how to do this is to copy the java sub-directory like described here:

1. Copy .../extension/ezfind/java to .../extension/ezfind/archive:

   $  cp -r extension/ezfind/java extension/ezfind/archive
   

2. Run the following command in extension/ezfind/java:

   $ cd extension/ezfind/java
   $ java -jar start.jar
   

3. Then activate this second Solr instance in extension/ezfind/archive on a dedicated port:

   $ cd extension/ezfind/archive
   $ java -jar -Djetty.port=8984 start.jar
   

4. And then as described above assign this URI to the archive shard:

   Shards[]
   Shards[archive]=http://localhost:8984/solr/admin