Supporting `MAXSIZE` as well as `MAXLEN` on `XADD` would also handle a nice Kafka feature (the ability to define your log size in either number of messages or s

Supporting `MAXSIZE` as well as `MAXLEN` on `XADD` would also handle a nice Kafka feature (the ability to define your log size in either number of messages or size on disk). Something like: `XADD MAXSIZE ~ 2147484000 * foo bar` to cap the stream at 2GB + 1 node.