https://github.com/duyledat197/messenger

Design a messenger platform that can serve for around more than 100M users. The platform supports web and mobile apps(android, ios).
https://github.com/duyledat197/messenger

cassandra clean-code golang grpc grpc-ecosystem grpc-gateway mqtt opensearch postgresql protoc redis scylladb swagger webrtc websocket

Last synced: 28 days ago
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Design a messenger platform that can serve for around more than 100M users. The platform supports web and mobile apps(android, ios).

• Host: GitHub
• URL: https://github.com/duyledat197/messenger
• Owner: duyledat197
• License: other
• Archived: true
• Created: 2024-03-22T11:28:24.000Z (11 months ago)
• Default Branch: main
• Last Pushed: 2024-06-28T10:12:23.000Z (8 months ago)
• Last Synced: 2024-09-30T04:02:31.397Z (5 months ago)
• Topics: cassandra, clean-code, golang, grpc, grpc-ecosystem, grpc-gateway, mqtt, opensearch, postgresql, protoc, redis, scylladb, swagger, webrtc, websocket
• Language: Go
• Homepage:
• Size: 313 KB
• Stars: 0
• Watchers: 1
• Forks: 0
• Open Issues: 0
• Metadata Files:
  • Readme: README.md
  • License: LICENSE

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README

        
# Problem Statement

Design a messenger platform that can serve for around more than 100M users. The platform supports web and mobile apps(android, ios).

# Gathering Requirements

- Chatting:

  + Support one-on-one conversation.

  + Support group chat that has more than 1000 users per group.

  + Support those who already read the last message.

  + Support message sent time and message read time per user.

- Sending file, and attachment in a conversation:

  + Maximum size of a file, attachment is 5MB.

  + Maximum per sending is 5 files.

  + Just support image types(jpg, jpeg, png, SVG, ...) or document types(doc, docx, csv, xlsx).

  + Support emoji reaction for each message.

- Story video:

  + User can post brief videos.

  + User can post 10 brief videos per day.

  + Video duration must not exceed 60 seconds.

  + Support emoji reaction for each video.

# Capacity Planning

- Number of users on the application every month: 1M

- Number of active users per second at peak traffic: 500K

- Number of messages per second at peak traffic: 10M

- Estimate Database store size: 1M users * 5KB per user

# High-level Design

## General Design

![messenger_high_level_design general](https://github.com/duyledat197/messenger/assets/38448882/0fb884be-78e1-41f0-bfc6-1c4590dd8b8d)

## Chatting Design

![chatting_high_level_design drawio](https://github.com/duyledat197/messenger/assets/38448882/c592f2b1-18d3-4dc6-8e95-8af82e02eeec)

## Emoji Design

![messenger_high_level_design](https://github.com/duyledat197/messenger/assets/38448882/a6af24ec-0cf7-44e4-8caa-6b58d5468066)

# Protocols

# Database

- Pros/Cons Between databases

- Decided or Plan

# API Design

# Monitoring

1. Availability SLA: p99.999

2. Latency SLA: p99.99 of 5 milliseconds