/
References & Glossary for chat system

References & Glossary for chat system

Owned by thierry sinassamy
Last updated: Jun 06, 2022
1 min read

Polling

 

Long Polling

 

 

Storage

2 Types of data :

  • Generic data stored in relational database (user profil, setting, etc.) → Replication and sharding are common techniques to satisfy availability and scalability requirements.

  • Chat history data stored in KV Store (NoSQL DB) →

    • 1) Amount of data is enormous for chat system;

    • 2) only recent chats are accessed frequently and users do not look up for old chats;

    • 3) user might use random access (search, view mentions, …);

    • 4) read to write ratio is about 1:1 for 1 on 1 chat apps.