ভোক্তা গ্রুপগুলি বিস্তারিতভাবে কীভাবে কাজ করে?

A CONSUMER GROUP = consumers cooperating to consume a topic:
  → each PARTITION is assigned to exactly ONE consumer in the group (at a time)
  → partitions are distributed across the group's consumers → PARALLEL consumption
  → e.g. 6 partitions, 3 consumers → 2 partitions each
→ scale consumption by adding consumers (UP TO the partition count — extra consumers idle)