-------- Original Message -------- Subject: Re: [lvs-users] question about load balancing smtp From: Bruce Richardson <itsbr...@workshy.org> To: lvs-users@linuxvirtualserver.org Date: 04/26/2010 11:49 AM
> On Sun, Apr 25, 2010 at 08:03:54PM +0200, Michiel van Es wrote: >> Hi, >> >> I want to load balance smtp with LVS because I heard that LVS is capable >> of showing the source ip to the real servers. >> Is that correct? > > Just out of curiosity, why are you load balancing SMTP at all? In my > experience, the number of circumstances that absolutely require SMTP > load balancing/clustering are very rare, given that the protocol has > fault tolerance and failover built into it. In fact, load-balancing > SMTP hosts can actually cause slower deliveries and unpredictable > behaviour, because it can conflict with the protocol's own resilience > features. I know that with DNS and the SMTP protocol load balancing and failover can be established. But I want to experience load balancing through a software load balance setup, a load balancer can balance the load on several algorithms which a smtp proxy or dns setup doesn't have. What about outgoing smtp servers for mailing list servers etc? I understood that LVS is capable of showing the source ip to the real servers so there are no problems with the protocol's own resilience features. > > Even where it is needed, I'd prefer smtp proxies over LVS. > Michiel _______________________________________________ Please read the documentation before posting - it's available at: http://www.linuxvirtualserver.org/ LinuxVirtualServer.org mailing list - lvs-users@LinuxVirtualServer.org Send requests to lvs-users-requ...@linuxvirtualserver.org or go to http://lists.graemef.net/mailman/listinfo/lvs-users
