Data loss detection

Hi,

We are seeing less data on the brokers than we send form the producers: 84 GB to 58 GB.

What is the best way to ensure / detect if all data has been send properly to the brokers from the producers.

Is there any logs that we can check on the producers?

Configuration is 5 Brokers, 2 producers, no replication factor, async and ask is 1 and no compression.

Thanks,
Maung