1. Setup / Tune Proxy Server Squid for RTC
Wayne Chiang
04/24/2013

2. What is squid Popular open source proxy server.
Caching proxy for the Web supporting HTTP, HTTPS, FTP, and more.
Reduces bandwidth and improves response times by caching and reusing frequently-requested web pages.

3. Download and Build http://www.squid-cache.org/Versions/
Latest release (released 3/12/2013)
I have built it on miles-lab (Linux 6.4) /home/mlsinst/squid/squid-3.3.3
Installed on /home/mlsinst/squid/install333
Proxy of to

4. squid.conf cache_replacement_policy heap GDSF
memory_replacement_policy heap GDSF
logformat squid %{%b %d %Y %H:%M:%S}tl.%03tu %{%Z}tl %6tr %>a->%lp %Ss/%03>Hs %<st %rm %ru %un %Sh/%<A %mt
access_log /home/mlsinst/squid/install333/var/logs/access.log squid
#cache_store_log none
cache_store_log /home/mlsinst/squid/install333/var/logs/store.log
cache_peer satchmo.ottawa.ibm.com parent no-query originserver name=satchmoAccel ssl login=PROXYPASS sslflags=DONT_VERIFY_PEER
acl satchmoport myport 9843
cache_peer_access satchmoAccel allow satchmoport
coredump_dir /home/mlsinst/squid/install333/var/cache
http_access allow all
cachemgr_passwd disable all
ssl_bump allow all
sslproxy_cert_error allow all
https_port 9843 cert=/home/mlsinst/squid/install333/etc/server.pem accel key=/home/mlsinst/squid/install333/etc/privkey.pem vhost
refresh_pattern %
cache_dir aufs /home/mlsinst/squid/install333/var/cache
buffered_logs on

5. Run squid
Cd /home/mlsinst/squid/install333/sbin
Run './squid -z' to create the directory structure for the first time.
Run './squid' to start the proxy on Linux.
To stop the proxy, you can run "./squid -k shutdown". 

7. access.log TCP_HIT TCP_MISS TCP_MEM_HIT
A valid copy of the requested object was in the cache.
TCP_MISS
The requested object was not in the cache.
TCP_MEM_HIT
A valid copy of the requested object was in the cache and it was in memory, thus avoiding disk accesses.

8. Tuning Squid
Set the "cache_mem" directive in squid.conf as large as possible
Set the "cache_dir" directive in squid.conf to a large value will increase the disk-based cache size for squid.
Turn off access logging if you do not require it for day to day use

9. Reference Setting up the Squid Caching Proxy w/SSL for RTC 2.0
Using content caching proxies for Jazz Source Control

10. Q&A