ccr redis connection when using external redis

[kavyavvv]

Can someone help in following doubts
1.during communication with sentinel what commands are used by harbor
2.Which clients are getting used by harbor to connect with sentinel and redis.

[stonezdj]

What is CCR redis? What is the error when using CCR redis? it seems doesn't related to Harbor

[kavyavvv]

what all commands are used by harbor to communicate with redis /sentinel