Hi Lidan,

I am not sure if this fit your requirements or not, but you can also set for the specific clients a very low frequency limit.

Please refer to setRequestedMaxFrequency client method to further details. In this case you will receive ADD and DELETE events as usual, but the UPDATE events with very low frequency. Obviously, as Marco said, you can not completely avoid to receive them.

Please note that by setting the frequency limit you give up the "unfiltered" management and then, in special scenarios, two events of ADD and DELETE (for the same key) can be merged together and result in no sending.