**Redis is an open source (BSD licensed), in-memory data structure store, used as a database, cache and message broker.
**

We currently use Redis manage candidate photos to optimize resource of our main database nodes. Some notes on Redis learned from 2019-03-22:

- Redis does not restart on our instance (although it should), upon an update, Redis needs to be restarted.
- This command can be ran on server util0
- redis-server --daemonize yes --protected-mode no
- /usr/bin/python /root/utilities/canphoto/photos_in_redis.py -i /data/wwwstatic/canphoto/