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RE: Policies based on packet content

To: "'Shez'" <shez@xxxxxxx>, "lvs-users@xxxxxxxxxxxxxxxxxxxxxx" <lvs-users@xxxxxxxxxxxxxxxxxxxxxx>
Subject: RE: Policies based on packet content
From: Nicolas Huillard <nhuillard@xxxxxx>
Date: Thu, 11 May 2000 17:08:49 +0200
Didn't I just read about this kind of persistence, needed for the https 
protocol. Maybe I read this on the ultra-monkey site, or linux-ha.org, or the 
LVS site...
I think this is just a matter of configuring lvs.

Nicolas Huillard

-----Message d'origine-----
De:     Shez [SMTP:shez@xxxxxxx]
Date:   jeudi 11 mai 2000 15:30
À:      lvs-users@xxxxxxxxxxxxxxxxxxxxxx
Objet:  Policies based on packet content

Hi there,
        What I want to achieve is HA and load balancing for a web-farm handling
many thousands of different sites.  For a variety of efficiency and
performence reasons I want to have a form of persistance based on the ``Host:''
header of the incoming packets.  

In this way during normal usage requests for a particular site would always end
up at the same backend server.  Normal usage is here defined as when load is
acceptable and no failures have occured.

Now I understand that LVS makes most of its decisions in kernel space, and
this sort of data based filtering generally is better off living in user space,
but I also know that the standard kernel masquarading does some work of this
type, for example for re-writing ftp command streams.

So basicaly I'm curious to see if anyone thinks that this sort of scheme will
ever work in LVS, or whether I should go off investigate high-performence
userland relays?

Cheers
Shez

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