[Recap] How Discord stores trillions of messages

Reference:

• https://discord.com/blog/how-discord-stores-billions-of-messages

• https://discord.com/blog/how-discord-stores-trillions-of-messages

This note will show the evolution of Discord storage. It starts from a single Database to a cluster Database supporting trillion messages. We also will understand the drawback of using Cassandra at Discord and how they chose and migrated to the new Database.