Redis and LevelDB are very different, with different use cases. LevelDB is a key-value storage library that writes to disk. It's the sort of thing you could us

Redis and LevelDB are very different, with different use cases. LevelDB is a key-value storage library that writes to disk. It's the sort of thing you could use as the storage layer for a relational database. On the other hand, Redis is an in-memory key-value database server.