I have been trying to determine strategies for implementing sessions via Ruby on Rails. I am particularly concerned about scalability and session replication across multiple servers in large scale sites. What is the proper choice? Here are some options for session management with Rails:
- No session
- PStore
- ActiveRecordStore
- MemCacheStore
Using PStore writes to a local file system, which doesn’t scale across multiple servers unless it is a shared directory visible to them all. This isn’t very practical across multiple data-centers. ActiveRecordStore uses a DB which means each access of the session objects may use DB resources. Again this isn’t scalable.
Thus, MemCacheStore looks like the way to go for most web applications. There is a great discussion of it by Stefan Kaes.
Anybody else using another solution?
