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

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 for a

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

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 fair

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 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 How do I do

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 running?

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 server? On what OS

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 at all What is

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