What internal component underlies the concept of Topic in Kafka?

In Kafka, the concept of a Topic represents a logical category or channel for messages. Internally, a Topic is divided into several partitions, each of which is an ordered, immutable log of messages.

Each partition stores messages in the order they are written and has a unique offset index for each message. Partitions are distributed across Kafka brokers for scalability and fault tolerance.

Thus, a Topic is a set of partitions that allows for parallel reading and writing of data, ensuring high performance and scalability of the system.