Introduction

GOIM is a IM and push notification server cluster.

Features

• Light weight
• High performance
• Pure Golang
• Supports single push, multiple push and broadcasting
• Supports one key to multiple subscribers (Configurable maximum subscribers count)
• Supports heartbeats (Application heartbeats, TCP, KeepAlive, HTTP long pulling)
• Supports authentication (Unauthenticated user can’t subscribe)
• Supports multiple protocols (WebSocket，TCP，HTTP）
• Scalable architecture (Unlimited dynamic job and logic modules)
• Asynchronous push notification based on Kafka

Architecture

Benchmark

Benchmark Server

CPU	Memory	OS	Instance
Intel(R) Xeon(R) CPU E5-2630 v2 @ 2.60GHz	DDR3 32GB	Debian GNU/Linux 8	1

Benchmark Case

• Online: 1,000,000
• Duration: 15min
• Push Speed: 40/s (broadcast room)
• Push Message: {“test”:1}
• Received calc mode: 1s per times, total 30 times

Benchmark Resource

• CPU: 2000%~2300%
• Memory: 14GB
• GC Pause: 504ms
• Network: Incoming(450MBit/s), Outgoing(4.39GBit/s)

Benchmark Result

• Received: 35,900,000/s
• English
• 中文

Documents

• Protocol
• Push API
• Cloud Infrastructure

Examples

• Online Example: Online Example
• Websocket: Websocket Client
• Android: Android Client
• iOS: iOS Client

LICENSE

goim is is distributed under the terms of the MIT License.