Annotation

Every row in the Redis annotation db’s is prefixed with the annotation task as a namespace (e.g., <task>:<row>). Below is a table of the Redis db’s used for annotation, all run on a single Redis server.

Redis DB	Description
users
response
state
key_to_path	Maps from a random key to a b64(row) + ‘ ‘ + b64(column)
path_to_key	Maps from b64(row) + ‘ ‘ + b64(column) to a random key

The state is the global memory of the task as it is being executed. Below is a table of the state rows.

State Row	Description
<task>:rows	PQ of rows, user view reduces priority. Determines which row to show next.
<task>:seen:<user>	Set of rows user has seen.
<task>:data_lock	Lock needed to mutate state/key_to_path/path_to_key