Re: Limitations

[Jens Beyer <jbe@xxxxxxxxxxx>]

We use LVS mainly to Balance Web servers (but also mail-related stuff),
distributing about 10-15Mbit incoming traffic (on 4 LB-pairs) with
60-80Mbit outgoing traffic.
We found two limitations; since LVS has no access to content of
(http-)packets all kind off session-based services without having
a central session manager aren't LVS'able. Since LVS is too "low-level" 
this is easily understood. 
Much more complicated to explain to managers is why one may have only 
one service-http (one VIP) per machine (we have a lot webservers which 
perform better on two parallel running apache). Best bet here is to 
distribute those service over different machines (high availability).
Last Escape I found therefor is 2 VIP distributed per DNS-RR on one 
Loadbalancer balancing to 2x5 Realservers (this service has 7 Mbit IN
and 40 Mbit OUT). Of course this applies only to DR/Tunnel which we
prefer in cause of better performance.

Jens

-- 
Jens Beyer
jbe@xxxxxx