Topics are the core abstraction in Kafka. Topics is the name of the stream to which records are published. For example, a topic named orders can be used to publish orders from an e-commerce website. To be more specific,
A topic is a category or feed name to which records are published.
- Topics are split into partitions.
- Each partition is ordered and immutable. This means that records are appended to a partition in a strictly sequential order and once written, they cannot be modified.
- Each record in a partition is assigned a sequential id number called the offset that uniquely identifies each record within the partition.
