Occasionally, you must override the auto switching behavior in Acquia Search for specific reasons (which can include the following):

• You are implementing a single search page returning results from several Drupal websites. For this approach, all websites must read and write to a single Solr index and use a module such as the Apache Solr Multisite Search module to power your search pages.
• Your subscription level isn’t entitled to several Acquia Search Solr indexes, and you must write into your single, available index from several environments.
• You must read/write access from a local- or non-Acquia-hosted website.

To stop Acquia Search from enabling auto switching, use one of the following methods:

• Using code overrides to set the Acquia Search Solr connection for Acquia Search
• Disabling auto switching

Using code overrides to set the Acquia Search Solr connection¶

Acquia Search subscribers can choose to manually configure the connections in the settings.php file by overriding variables. For non-hosted subscribers, setting these variables is the only available method to use multiple Acquia Search Solr indexes.

Code override procedure¶

Select the code override to use based on your installed Drupal version and the module in use, from the following tabs:

// Override the ID of the Acquia Search Solr core to use.
// Replace ABCD-123456.env.mysite with the Solr core ID you wish to connect to

// For acquia_search 3.1.7:
// Acquia recommends that you use this option. If you use this option, the system does not override the Solr core used by the Drupal site as one Drupal site can have multiple Solr cores.

$settings['acquia_search']['server_overrides'][$server_id] = 'ABCD-123456.env.mysite';

// For acquia_search 3.1.7 and later:
// Acquia recommends that you avoid using this option. However, if you use this option, the system overrides the Solr core used by the Drupal site.

$settings['acquia_search']['override_search_core'] = 'ABCD-123456.env.mysite';

Disabling auto switching¶

Code Override for Acquia Search¶

Setting $settings['acquia_search']['read_only'] to FALSE avoids auto switching, causing the production Solr index to enforce read/write mode as shown in the following code example:

$settings['acquia_search']['read_only'] = FALSE;