Tool for copy hashes from redis to redis
Usage of ./r2s:
-h --help Print help information
-p --production Redis production node <host:port>
-s --sandbox Redis sandbox node <host:port>
-i --production-db Redis production db <num>. Default: 0
-o --sandbox-db Redis sandbox db <num>. Default: 0
-d --debug Enable debug mode
./r2s_darwin_64 -p 127.0.0.1:6379 -i 3 -s 127.0.0.1:6379 -o 4