alt Hacker NewsRedis is used for plenty of things, not just memory caches.
For example if you use it for session storage, you can't have your application read from a random instance that may or may not contain the session.
Redis is used for plenty of things, not just memory caches.
For example if you use it for session storage, you can't have your application read from a random instance that may or may not contain the session.
This case is exactly what he talks about. To get HA just setup more than one redis cache - or rebuild the session if it was lost in the redis cache.