Topic

• Topics are like table, provides scalability
• Each topic has 1 or more than 1 partition
• Each partition is an ordered, immuatable sequence of records
• Each record is assigned a sequential number called offset
• Each partition is independent of each other
• Ordering is guaranteed only at the partition level
• Partition continously grows as new records are produced
• All the records are persisted in a distributed commit log in the file system where Kafka is installed