How to trace the nil result request from Redis Cluster?

Redis administration
1

Need to monitor the failed requests where the keys are not available in Redis Database.

Requirements: This will help me in build my cache to feed the value for those unavailable keys.

I have tried $ redis-cli monitor | grep -i “get” but it give all requests.

For example

127.0.0.1:6379> get 100CCVVYYAll
(nil)

Appreciate for a quick support.
Regards,
Santosh