im架构设计目录

0.im设计

https://www.163.com/dy/article/G69UAB430511X1MK.html

1.保证在线实时消息的可靠投递

http://www.habadog.com/2015/04/29/webim-msg-send-ack/

https://www.163.com/dy/article/G69UAB430511X1MK.html

2.微信长轮训机制

http://www.habadog.com/2015/04/28/webim-msg-ontime/

3.移动端IM中大规模群消息的推送如何保证效率、实时性

https://cloud.tencent.com/developer/article/1194225

4.用户状态管理

http://www.52im.net/thread-715-1-1.html