Re: Scalability with high density servers and proxies, TCP port limits

2015-07-07 Thread Christian Balzer
On Fri, 3 Jul 2015 14:29:55 +0900 Christian Balzer wrote: On Fri, 03 Jul 2015 07:05:43 +0200 Urban Loesch wrote: Hi, Am 03.07.2015 um 05:14 schrieb Christian Balzer: 2. Here is where the fun starts. Each IMAP session that gets proxied to the real mailbox server needs a

Scalability with high density servers and proxies, TCP port limits

2015-07-02 Thread Christian Balzer
Hello, first post in 3 years, kinda shows how painless Dovecot is. ^o^ Also this isn't really a dovecot issue, alas it's involved and since there are some large scale implementations of it I hope somebody here has some insights I might have missed. Currently we're running this setup: 1. LVS

Re: Scalability with high density servers and proxies, TCP port limits

2015-07-02 Thread Christian Balzer
On Fri, 03 Jul 2015 07:05:43 +0200 Urban Loesch wrote: Hi, Am 03.07.2015 um 05:14 schrieb Christian Balzer: 2. Here is where the fun starts. Each IMAP session that gets proxied to the real mailbox server needs a port for the outgoing connection. So to support 2 million sessions we

Re: Scalability with high density servers and proxies, TCP port limits

2015-07-02 Thread Urban Loesch
Hi, Am 03.07.2015 um 05:14 schrieb Christian Balzer: 2. Here is where the fun starts. Each IMAP session that gets proxied to the real mailbox server needs a port for the outgoing connection. So to support 2 million sessions we need 40 IP addresses here. Ouch. And from a brief test having