How do i change the apachesolr index environment based on node values?

Question

I have two apachesolr environment setup in my drupal instance. I want to index some nodes to one environment and some to the other, say based on some node values.

I could see that it always indexes to default the environment. I could see the possibility of indexing in two environments, but it is irrespective of the nodes value.

How can i achieve it?

UPDATE:

To give more detail, I am trying to achieve shards in apache solr in Drupal

UPDATE - 17 DEC 2012

Modules used:

• Apache solr Module and not search api/search api solr

Reason on why i need node values

• I have a large nodes of a particular entity type, This makes my index so large.

  • So Decided to go with shards with multiple indexes of the same node type.

• So based on the node size and its priority of the node or proximity of the nodes location or users location , I want to split up the index to separate cloud servers and index them.

• Proximity of the node also gives me power of separate out search indexes at a later stage.

Answer 1

I do not know if it is possible to shard Drupal nodes into different Solr indexes based on arbitrary field values, I do however know it is possible at a node type level.

From the API documentation:

/**
 * This is invoked for each entity that is being inspected to be added to the
 * index. if any module returns TRUE, the entity is skipped for indexing.
 *
 * @param integer $entity_id
 * @param string $entity_type
 * @param integer $row
 *   A complete set of data from the indexing table.
 * @param string $env_id
 * @return boolean
 */
function hook_apachesolr_exclude($entity_id, $entity_type, $row, $env_id) {
  // Never index media entities to core_1.
  if ($entity_type == 'media' && $env_id == 'core_1') {
    return TRUE;
  }
  // Never index news entities to core_2.
  if ($entity_type == 'news' && $env_id == 'core_2') {
    return TRUE;
  }
  // Default to allow.
  return FALSE;
}

So all you would need to do is allow some node types to be indexed by one core, and allow some other node types to be indexed by another core.