ask/celery — pull request #590 by steeve (2012-01-17 16:36:33+00:00)
Title: Allows to have a "detailed" mode for the Cassandra backend.

Basically the idea is to keep all states using Cassandra wide columns.
New states are then appened to the row as new columns, the last state being the last column.

To use this feature, the Column Family MUST use a TimeUUID as the column name (comparator_type).
For instance, using cassandra-cli:

create column family task_states with comparator = TimeUUIDType;

Because it uses TimeUUIDs, the last column is guaranteed to be the last state.