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The IPVS kernel sync daemon is the feature that keeps the sessions going
in that failover scenario.
It seems to work fine for simple TCP connections.
Especially for some internal load balancing I do in the app stack, the
IPVS sync is handy for enabling routine load balancer maintenance
without causing long-lived connections to get torn down.
I will say there's one other odd thing about it: ipvsadm -L does not
show connections picked up from a partner load balancer, but they work
anyway. I can live with this stuff so long as it doesn't kill IPVS or
otherwise destabilize the machine.
Dave
Charles Williams wrote:
> As far as I have read all sessions are lost upon a failover and must be
> restart/rebuilt. almost
> positive this applies to ftp sessions as well.
>
> chuck
>
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