Huge intra cluster bandwith

Hi there.

We are using Community Edition 6.5.1 with a 3 node cluster on AWS. 2 node on an AZ and 1 node on another.
We have only one bucket with no replication enabled.
This bucket contains about 100 GB of data which move a lot (each data as few minutes of lifetime in couchbase).
We are clearly not expert about Couchbase.

Our cluster make about 40 GB or traffic per node and per day and we are lookin for solution to reduce that because it’s implies huge inter availability zone data transfert cost.

Thanks you per advance,

I will be happy to give all required information to get help,

Best regards,