A Redis Hash is similar enough to Casandra's data structure I doubt they'd need that.
row key = key
column = field
I know Lua is "an option" in Redis but I avoid it like the plague because under production loads, Redis hashes perform and are easy to maintain w/o Lua.
More or less this. Row = HASH key, sorted sets for secondary key indexing, and also for iterating primary key entries. I've built an abstraction layer on top of redis to automate all that and it works rather well.
