Special Forums IP Networking Proxy Server Squid parent Selection Algorithm Post 302947093 by brusell on Monday 15th of June 2015 11:12:11 AM
Squid parent Selection Algorithm

Hello guys,
I have one question regarding choosing proper peer Selection Algorithm. Actually we have six Squid (2.7) servers with two parent upstream proxies running on two web appliances. In appliance statistics we see that balancing is not optimal and first appliance is keeping the majority of load.

Currently configuration on all Squids looks like:
Code:
cache_peer parent1 parent 80 0 no-query no-digest no-netdb-exchange userhash sourcehash round-robin
cache_peer parent2 parent 80 0 no-query no-digest no-netdb-exchange userhash sourcehash round-robin

My question is how exactly Squid is acting when there is defined more algorithms of Peer Selection (in this case userhash sourcehash round-robin) and how it will behave in case that there are define only two upstream proxies?
Just note that before all six proxies is network balancer which is masking source IP of client so sourcehash seems to be for me as nonsense since source IP is the same every time. User name is visible for proxies so userhash is feasible solution but not sure how much is optimal in case just two parent proxies.

Many thanks for sharing your opinions.
 
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cachemgr.cgi(8) 					      System Manager's Manual						   cachemgr.cgi(8)

NAME
cachemgr.cgi - squid HTTP proxy manager interface SYNOPSIS
http://your.server/cgi-bin/cachemgr.cgi DESCRIPTION
The cache manager (cachemgr.cgi) is a CGI utility for displaying statistics about the Squid HTTP proxy process as it runs. The cache man- ager is a convenient way to manage the cache and view statistics without logging into the server. FILES
./cachemgr.conf /etc/squid/cachemgr.conf The access configuration file defining which Squid servers may be managed via this cachemgr.cgi program. Each line specifies a server:port followed by an optional description The server name may contain shell wildcard characters such as *, [] etc. A quick selection dropdown menu is automatically con- structed from the simple server names. Specifying :port is optional. If not specified then the default proxy port is assumed. :* or :any matches any port on the target server. SECURITY
cachemgr.cgi calls the requested server on the requested port using HTTP and returns a formatted version of the response. To avoid abuse it is recommended to configure your web server to restrict access to the cachemgr.cgi program. Configuration examples for many common web servers can be found in the Squid FAQ. SEE ALSO
squid(8) The Squid FAQ, Chapter 9 The Cache Manager Squid Web Proxy 3.0.STABLE25 cachemgr.cgi(8)

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