Thanks. On (2) I'm thinking only of Redis as a memory cache, in that case I think it's fairly simple, as with Memcached. Once you start doing persistence, then

Thanks. On (2) I'm thinking only of Redis as a memory cache, in that case I think it's fairly simple, as with Memcached. Once you start doing persistence, then yes, it becomes a bit more complicated with a lot of other things to worry about, especially that you need RAM >= disk space. While it's another advantage of Redis that persistent caching is possible (and can be bolted on at a later date), taking advantage of it definitely adds some complexity and room for error.