[root@localhost src]# ruby redis-trib.rb reshard 127.0.0.1 7000 --from 7ad192ef15a2eb136b8ae677e75a88799877c04e --to a3149dc5196622de43e3be6501368267b334eb18 --slots 1
redis-trib.rb:1573: warning: key "threshold" is duplicated and overwritten on line 1573
[ERR] Wrong number of arguments for specified sub command

出现上述错误，看代码后得知，是因为 reshard命令的参数个数只能是两个

ruby redis-trib.rb reshard 127.0.0.1:7000

后续根据提示进行填充即可