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GL> Mladen Turk wrote:

>> Ok, just wanted to clear if we are going to make another compromise :),
>> since sticky sessions are tightly coupled with the load balancer itself and
>> the way it decides the client route.

GL> In theory sticky sessions shouldn't be tightly coupled like this - it
GL> should be a case of "plan a) stick to the same server, else revert to
GL> plan b)".

GL> In this case plan B could be simple DNS round robin, or it could be a
GL> load balancer, in other words another module entirely.

GL> This raises a question - what order do the modules run in? In theory the
GL> sticky module should run last, in other words a load balancer (or DNS
GL> round robin, or whatever) orders the IPs based on some criteria (load,
GL> or round robin, or whatever), and then the sticky module takes the
GL> sticky server identified by the cookie/parameter and moves that sticky
GL> IP on top of the list.

GL> I suppose in this case the load balancer would run HOOK_MIDDLE, and
GL> sticky would run HOOK_LAST.

GL> Regards,
GL> Graham
GL> --


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