Archive old content data in different database

Question

How can i make archive my old content and save in different db with my cron job.

I want to store in different DB because i want to increase my site performance.

In drupal 7 what's the best way to do it ?

Answer 1

Here's what you can do:

• Add your archive database to your settings.php below your default database.

  $databases['my_other_db']['default'] = array(
    // Your secondary database's credentials here.
    // You will be able to explicitly connect to this database from your modules.
  );
  

• In your cron script, load all nodes you want to archive. In this example I retrieve all nodes older than a month and no more than 50 at a time.

  $nodes_to_archive = array();
  
  $query = db_select('node', 'n')
    ->fields('node')
    ->condition('type', 'your_content_type')
    ->condition('created', REQUEST_TIME - (86400 * 30), '<')
    ->range(0, 50);
  $result = $query->execute();
  
  while($record = $result->fetchAssoc()) {
    $nodes_to_archive[] = $record;
  }
  

• In the same script, switch from database and add the nodes to the archive (make sure the second database has the same structure as the existing one)

  db_set_active('my_other_db');
  
  foreach ($nodes_to_archive as $node) {
    db_insert('node')
      ->fields($node)
      ->execute();
  }
  

• Still in the same script, switch back to the default database and remove the archived nodes.

  db_set_active();
  
  $nids = array();
  foreach ($nodes_to_archive as $node) {
    $nids[] = $node->nid;
  }
  
  node_delete_multiple($nids);
  

I haven't tested any of this so you might need to improve it here and there. If anything's unclear, please ask.

Here is a list of helpfull resources:

• How to connect to multiple databases within Drupal
• Function db_select
• Function db_insert
• Function node_delete_multiple