Re: Reread of config without restart

From: Michael Rennt <>
Date: Tue, 11 Mar 2008 19:50:06 +0100

Willy Tarreau wrote:
> On Tue, Mar 11, 2008 at 05:00:27PM +0100, Michael Rennt wrote:

>> Hi,
>> just tested it and it's working fine.
>> Where is haproxy retaining the persistence database or is the old process 
>> actually handing over the persistence information to the new one in memory?

> no, and generally speaking, you should as most as possible avoid to maintain
> any state in any equipment. Persistence is the worst thing to maintain because
> (when it is possible), it costs a lot and is generally a sign of poor initial
> design.
> Simply insert a cookie for your persistence and have any process and/or any
> machine be able to replace the first one at any time.

But how is persistence solved with source based balancing for example? How is haproxy maintaining the mapping of source ip to the destination server?

Also, how is query hashing realized? Do you put the hash into a cookie?


Michael Received on 2008/03/11 19:50

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