Design the HashTag Service

All possible approaches

Implement 5 approaches to count post per hashtag

• Naive (count++) for every event
• Naive batching (batch on server in a hashmap and then write to database)
• Efficient batching with minimizing stop-the-world usng deep-copy
• Efficient batching with minimizing stop-the-world using two-maps
• Kafka adapter pattern to re-ingest the post hashtags partitioned by hashtag

TODO

1. Artillery for load testing.
2. Setup kafka brokers using docker compose.
3. Measure the number of writes on the database in each of the above approaches - We can try doing this by using artillery