Moveout

Moveout operations move data from memory (WOS) into a new ROS container. Moveout flushes all historical data from the WOS to the ROS.

The following illustration shows the effect of a projection moveout on a single node:

ROS Containers

A ROS (Read Optimized Store) container is a set of rows stored in a particular group of files. ROS containers are created by operations like Moveout or COPY DIRECT. You can query the STORAGE_CONTAINERS system table to see ROS containers. The ROS container layout can differ across nodes due to data variance. Segmentation can deliver more rows to one node than another. Two data loads could fit in the WOS on one node and spill on another.