Re: [squid-users] Load Balancing Query

Mario Remy Almeida wrote:
> Hi All,
>
> Want to know if load balancing is possible with squid by maintaining
> sessions.
> Health check should be TCP Ports
>
> eg:
> Server A -> Active port 8080
> Server B -> Active port 8080
>
> Client -> Squid -> Server A and/or B
>
> Request 1 comes from 'Client A' Squid forwards the request to 'Server A'
> Request 2 comes from 'Client A' Squid forwards the request to 'Server A'
> and so on
> any further request from 'Client A' squid should only forward to 'Server
> A' until the session is same
>
> if
>
> Request 1 comes from 'Client B' Squid forwards the request to 'Server B'
> Request 2 comes from 'Client B' Squid forwards the request to 'Server B'
>
> if 'Server A' fails Squid should forward all the request to 'Server B'
>
> //Remy
>

HTTP is stateless. It contains no such thing as sessions. That is a
browser feature.

What you are looking for is something like CARP or sourcehash peering
algorithms. They keep all requests for certain URLs sent to the same
place (CARP) or all requests for the same IP to the same place (sourcehash).

see
http://www.squid-cache.org/Doc/config/cache_peer

Amos

-- 
Please be using
   Current Stable Squid 2.7.STABLE6 or 3.0.STABLE15
   Current Beta Squid 3.1.0.8 or 3.0.STABLE16-RC1