如何通过负载平衡流式传输点播视频

我想弄清楚如何对视频服务器进行负载平衡.
现实世界的场景是；

i have a storage server which stores all my video files,an several
servers to load balance my http request(works like a CDN service).
Client requests a video file -> Nearest Load balancing server
answers request (lets say it LBS) LBS -> Storage (find the video and
start sending first N kbyte to client,so it starts to play) -> LBS caches the rest of the
file on its own storage,and on the next request,serves it directly
from its cache,not from storage.

这种设置的问题是,我想通过RTMP提供视频,但是在平衡机(其nginx Web服务器)上,我无法提供虚拟文件(如rtmp流).

简而言之；我正在寻找一种类似于nginx Web服务器的rtmp服务器实现.任何想法,建议都会很棒.

注意：当前我正在尝试实现crtmpserver

参见有关文档：https://github.com/arut/nginx-rtmp-module/

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