Re: [Dovecot] Load Balancing and HA

2013-06-06 Thread Edwardo Garcia
We tried one time software solution, not very reliable under load, we move to coyotepoint equalizer hardware load balancer, very good cost and excellent reliable On Wed, May 29, 2013 at 7:23 AM, Romer Ventura rvent...@h-st.com wrote: Hello, I've been thinking about the best way to achieve

Re: [Dovecot] Load Balancing and HA

2013-06-06 Thread Nikolaos Milas
On 6/6/2013 9:34 πμ, Edwardo Garcia wrote: We tried one time software solution, not very reliable under load Could you please provide some details of that software solution setup? Thanks, Nick

Re: [Dovecot] Load Balancing and HA

2013-06-06 Thread Robert Schetterer
Am 06.06.2013 09:28, schrieb Nikolaos Milas: On 6/6/2013 9:34 πμ, Edwardo Garcia wrote: We tried one time software solution, not very reliable under load Could you please provide some details of that software solution setup? Thanks, Nick for loadbalancing keepalived is easy to setup,

Re: [Dovecot] Load Balancing and HA

2013-06-05 Thread Romer Ventura
On 31-05-2013 12:57, Patrick Westenberg wrote: Romer Ventura schrieb: Scenario1: This should allow any to lose any of the servers and clients still have access to their emails (although I am not sure how the indexes would react to this and sudden disconnection) - 2 Dovecot

Re: [Dovecot] Load Balancing and HA

2013-05-31 Thread Patrick Westenberg
Romer Ventura schrieb: Scenario1: This should allow any to lose any of the servers and clients still have access to their emails (although I am not sure how the indexes would react to this and sudden disconnection) - 2 Dovecot Proxy servers, using a virtual IP to where the clients

Re: [Dovecot] Load Balancing and HA

2013-05-31 Thread Andreas Kasenides
On 31-05-2013 12:57, Patrick Westenberg wrote: Romer Ventura schrieb: Scenario1: This should allow any to lose any of the servers and clients still have access to their emails (although I am not sure how the indexes would react to this and sudden disconnection) - 2 Dovecot Proxy

Re: [Dovecot] Load Balancing and HA

2013-05-29 Thread Andreas Kasenides
I am actually going through the first stages of implementing your Scenario1. There is small difference: there will also be 2*Postfix relays also on the Dovecot Proxies. This allows placing them in a DMZ such that the real Dovecot/Postfix servers are placed away from the WAN. After much arguing

Re: [Dovecot] Load Balancing and HA

2013-05-29 Thread Robert Schetterer
Am 29.05.2013 22:46, schrieb Andreas Kasenides: I should say that other more complicated setups like full blown clusters and distributed file systems have been rejected due to their complexity (and the fact we do not have experience with them). Our user base is around 3-4K of heavy users. i

[Dovecot] Load Balancing and HA

2013-05-28 Thread Romer Ventura
Hello, I've been thinking about the best way to achieve load balancing and making my mail servers highly available. So far I believe I have 2 scenarios: Scenario1: This should allow any to lose any of the servers and clients still have access to their emails (although I am not sure how the