Integrates with Apache Solr Search Integration to search across multiple sites.
Multisite search is made possible by having many sites share an index. Because each "document" is stored in the index with a site and a hash field, it is possible to filter by site or hash, and thus return results from just one site, or from all of the sites sharing an index.
This module adds a "Multisite search" tab to the search page. Normal Apache Solr search works as before.
The list of facets available to multisite search is different than those available to normal Apache Solr search, but includes created and updated dates, user name, taxonomy terms, and very importantly, site. Thus you can do a search on Site A and then filter your results to show just those on Site B.
Drupal 6 and Drupal 7 Multisite?
Drupal 6 and Drupal 7 can be mixed when using the 7.x-1.x branch and 6.x-3.x branch. Installing the module in each site is sufficient.
The 7.x-1.x branch of the Multisite Search module is compatible with the 7.x-1.x branch of the Apache Solr module
The 6.x-3.x branch of the Multisite Search module is compatible with the 6.x-3.x branch of the Apache Solr module.
The 6.x-1.x branch of the Multisite Search module is compatible with the 6.x-1.x branch of the Apache Solr module.