Hi,
I want to use varnish in my scenario as cache service, I have about 10 http
servers that serve Hls fragments as the backend servers and about 5 varnish
servers for caching purpose, the problem comes in when I use round-robin
director for backend servers in varnish,
if a varnish for specific file requests to one backend server and for the same
file but to another backend server it would cache that file again because of
different Host headers ! so my solution is using fallback director instead of
round-robin as follow:
```
In varnish-1:
new hls_cluster = directors.fallback();
hls_cluster.add_backend(b1());
hls_cluster.add_backend(b2());
hls_cluster.add_backend(b3());
hls_cluster.add_backend(b4());
hls_cluster.add_backend(b5());
hls_cluster.add_backend(b6());
hls_cluster.add_backend(b7());
hls_cluster.add_backend(b8());
hls_cluster.add_backend(b9());
hls_cluster.add_backend(b10());
In varnish-2:
new hls_cluster = directors.fallback();
hls_cluster.add_backend(b10());
hls_cluster.add_backend(b1());
hls_cluster.add_backend(b2());
hls_cluster.add_backend(b3());
hls_cluster.add_backend(b4());
hls_cluster.add_backend(b5());
hls_cluster.add_backend(b6());
hls_cluster.add_backend(b7());
hls_cluster.add_backend(b8());
hls_cluster.add_backend(b9());
In varnish-3:
new hls_cluster = directors.fallback();
hls_cluster.add_backend(b9());
hls_cluster.add_backend(b1());
hls_cluster.add_backend(b2());
hls_cluster.add_backend(b3());
hls_cluster.add_backend(b4());
hls_cluster.add_backend(b5());
hls_cluster.add_backend(b6());
hls_cluster.add_backend(b7());
hls_cluster.add_backend(b8());
hls_cluster.add_backend(b10());
```
But I think this is not the best solution, because there is no load balancing
despite, I used different backend for the first argument of fallback directive,
What is varnish recommendation for this scenario?
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