I have no idea, but someone ask about it
- Backup, backup again and again just to be sure
- In your 2.4 redis.conf, set the following properties to zero ; hash-max-zipmap-entries, list-max-ziplist-entries, set-max-intset-entries
- Restart redis and do SAVE command OR BGSAVE
- Edit dump.rdb file. Change first character to REDIS0001
- Copy to 2.0 instance and restart redis.
Redis dumper : https://github.com/r043v/rdd/