How is the kafka offset value computed?

问题

Is kafka offeset value unique per partition or per topic (considering same group id)?

回答1:

It is unique per partition. start from zero and long data type.

回答2:

It is a signed long, unique per partition and is incremented for every messages added to the partition log.

来源：https://stackoverflow.com/questions/40094936/how-is-the-kafka-offset-value-computed