Vertica Analytics Platform Version 9.2.x Documentation

Tuple Mover Operations

The Tuple Mover manages WOS and ROS data storage. It performs two operations:

  • Moveout moves data from WOS to ROS. During moveout operations, the Tuple Mover also enforces storage policies for the storage location.
  • Mergeout combines small ROS containers into larger ones and purges deleted data.

The Tuple Mover automatically performs these tasks in the background, at intervals that are set by its configuration parameters.

Each of these operations occurs at different intervals across all nodes. The Tuple Mover runs independently on each node, ensuring that storage is managed appropriately even in the event of data skew.

Tuple Mover operations are automatic and transparent, and typically require no intervention. However, Vertica provides various ways to control Tuple Mover behavior. For details, see Managing the Tuple Mover.