Re: DNS round robin does not give "fair" load balancing

2010-01-25 Thread Wietse Venema
Wietse Venema: > ram: > > > > On Mon, 2010-01-25 at 14:43 +0100, Emmanuel Seyman wrote: > > > > > * ram [25/01/2010 14:41] : > > > > > > > > All mails are sent by a postfix server and this box has to relay the > > > > mails to 3 load balanced machines. > > > > No windows machines in the picture

Re: DNS round robin does not give "fair" load balancing

2010-01-25 Thread Wietse Venema
ram: > > On Mon, 2010-01-25 at 14:43 +0100, Emmanuel Seyman wrote: > > > * ram [25/01/2010 14:41] : > > > > > > All mails are sent by a postfix server and this box has to relay the > > > mails to 3 load balanced machines. > > > No windows machines in the picture at all > > > > What is the DNS

Re: DNS round robin does not give "fair" load balancing

2010-01-25 Thread ram
On Mon, 2010-01-25 at 14:43 +0100, Emmanuel Seyman wrote: > * ram [25/01/2010 14:41] : > > > > All mails are sent by a postfix server and this box has to relay the > > mails to 3 load balanced machines. > > No windows machines in the picture at all > > What is the DNS server? On what OS is it

Re: DNS round robin does not give "fair" load balancing

2010-01-25 Thread Wietse Venema
ram: > On Mon, 2010-01-25 at 06:00 -0500, Wietse Venema wrote: > > > ram: > > > I try load balancing using a relayhost to a DNS A record with multiple > > > IP's > > > But I find that somehosts *always* get more mails than others > > > Doesnt help if I use MX records instead of A records > > >

Re: DNS round robin does not give "fair" load balancing

2010-01-25 Thread Emmanuel Seyman
* ram [25/01/2010 14:41] : > > All mails are sent by a postfix server and this box has to relay the > mails to 3 load balanced machines. > No windows machines in the picture at all What is the DNS server? On what OS is it running? Emmanuel

Re: DNS round robin does not give "fair" load balancing

2010-01-25 Thread ram
On Mon, 2010-01-25 at 06:00 -0500, Wietse Venema wrote: > ram: > > I try load balancing using a relayhost to a DNS A record with multiple > > IP's > > But I find that somehosts *always* get more mails than others > > Doesnt help if I use MX records instead of A records > > > > > > How do I do

Re: DNS round robin does not give "fair" load balancing

2010-01-25 Thread Wietse Venema
ram: > I try load balancing using a relayhost to a DNS A record with multiple > IP's > But I find that somehosts *always* get more mails than others > Doesnt help if I use MX records instead of A records > > > How do I do fair loadbalancing with postfix http://support.microsoft.com/default.a

Re: DNS round robin does not give "fair" load balancing

2010-01-25 Thread ram
On Mon, 2010-01-25 at 08:59 +0100, Bjørn Ruberg wrote: > ram wrote: > > I try load balancing using a relayhost to a DNS A record with multiple > > IP's > > But I find that somehosts *always* get more mails than others > > Are Windows DNS resolvers involved? If so, see for instance this article

Re: DNS round robin does not give "fair" load balancing

2010-01-25 Thread Bjørn Ruberg
ram wrote: I try load balancing using a relayhost to a DNS A record with multiple IP's But I find that somehosts *always* get more mails than others Are Windows DNS resolvers involved? If so, see for instance this article for a lead on why those resolvers think they know better than your DNS

DNS round robin does not give "fair" load balancing

2010-01-24 Thread ram
I try load balancing using a relayhost to a DNS A record with multiple IP's But I find that somehosts *always* get more mails than others Doesnt help if I use MX records instead of A records How do I do fair loadbalancing with postfix Thanks Ram