Re: [CentOS] Large scale Postfix/Cyrus email system for 100,000+ users

2007-10-24 Thread Christopher Chan
Chris Mauritz wrote: Christopher Chan wrote: I don't recall ever having a problem with postgresql. I guess the latest versions are more crash resilient. But still no builtin replication. This has gotten far afield of CentOS, but recent vintages of Postgresql DO support replication. :) h

Re: [CentOS] Large scale Postfix/Cyrus email system for 100,000+ users

2007-10-24 Thread Chris Mauritz
Christopher Chan wrote: I don't recall ever having a problem with postgresql. I guess the latest versions are more crash resilient. But still no builtin replication. This has gotten far afield of CentOS, but recent vintages of Postgresql DO support replication. :) http://www.postgresql.o

Re: [CentOS] Large scale Postfix/Cyrus email system for 100,000+ users

2007-10-24 Thread Christopher Chan
Les Mikesell wrote: Christopher Chan wrote: Heck, I see lots of circles where they wouldn't trust mysql for an enterprise application so it seems clear that you are not talking about stability or performance but rather familiarity and the amount of trust you have in what you know. Let's see,

Re: [CentOS] Large scale Postfix/Cyrus email system for 100,000+ users

2007-10-24 Thread Les Mikesell
Christopher Chan wrote: Heck, I see lots of circles where they wouldn't trust mysql for an enterprise application so it seems clear that you are not talking about stability or performance but rather familiarity and the amount of trust you have in what you know. Let's see, mysql crashes (elche

Re: [CentOS] Large scale Postfix/Cyrus email system for 100,000+ users

2007-10-24 Thread Christopher Chan
Yeah, well, I guess the Fedora Directory server is unlikely to drop its entire datastore and will actually keep running but hey, are you going to migrate back to ldap if you have a system that is distributed across different mysql boxes running on cheap boxes and does its job? Yes, I've had

Re: [CentOS] Large scale Postfix/Cyrus email system for 100,000+ users

2007-10-24 Thread Christopher Chan
Heck, I see lots of circles where they wouldn't trust mysql for an enterprise application so it seems clear that you are not talking about stability or performance but rather familiarity and the amount of trust you have in what you know. Let's see, mysql crashes (elcheapo hardware, happens onc

Re: [CentOS] Large scale Postfix/Cyrus email system for 100,000+ users

2007-10-24 Thread Craig White
On Thu, 2007-10-25 at 10:30 +0800, Christopher Chan wrote: > Craig White wrote: > > On Thu, 2007-10-25 at 09:58 +0800, Christopher Chan wrote: > >> Les Mikesell wrote: > >>> Christopher Chan wrote: > >>> > >>> I thought the usual ways of doing this were to either use a > >>> high-performan

Re: [CentOS] Large scale Postfix/Cyrus email system for 100,000+ users

2007-10-24 Thread Christopher Chan
Craig White wrote: On Thu, 2007-10-25 at 09:58 +0800, Christopher Chan wrote: Les Mikesell wrote: Christopher Chan wrote: I thought the usual ways of doing this were to either use a high-performance NFS server (netapp filer...) and maildir format so you can run imap from any client facing se

Re: [CentOS] Large scale Postfix/Cyrus email system for 100,000+ users

2007-10-24 Thread Les Mikesell
Christopher Chan wrote: The service provider I used to work for tried openldap in 98. They got burned big time. Maybe it is up to the task today. What kind of hardware, though, would you use for one that the OP indicates will get a lot of writes? Everything I have read says LDAP is not for hi

Re: [CentOS] Large scale Postfix/Cyrus email system for 100,000+ users

2007-10-24 Thread Craig White
On Thu, 2007-10-25 at 09:58 +0800, Christopher Chan wrote: > Les Mikesell wrote: > > Christopher Chan wrote: > > > > I thought the usual ways of doing this were to either use a > > high-performance NFS server (netapp filer...) and maildir format so > > you can run imap from any clien

Re: [CentOS] Large scale Postfix/Cyrus email system for 100,000+ users

2007-10-24 Thread Christopher Chan
Les Mikesell wrote: Christopher Chan wrote: I thought the usual ways of doing this were to either use a high-performance NFS server (netapp filer...) and maildir format so you can run imap from any client facing server, or to keep the delivery host information in an LDAP attribute that you fi

Re: [CentOS] Large scale Postfix/Cyrus email system for 100,000+ users

2007-10-24 Thread Les Mikesell
Christopher Chan wrote: I thought the usual ways of doing this were to either use a high-performance NFS server (netapp filer...) and maildir format so you can run imap from any client facing server, or to keep the delivery host information in an LDAP attribute that you find when validating t

Re: [CentOS] Large scale Postfix/Cyrus email system for 100,000+ users

2007-10-24 Thread Christopher Chan
Les Mikesell wrote: Christopher Chan wrote: I thought the usual ways of doing this were to either use a high-performance NFS server (netapp filer...) and maildir format so you can run imap from any client facing server, or to keep the delivery host information in an LDAP attribute that you f

Re: [CentOS] Large scale Postfix/Cyrus email system for 100,000+ users

2007-10-24 Thread Craig White
On Thu, 2007-10-25 at 02:26 +0800, Christopher Chan wrote: > Craig White wrote: > > On Wed, 2007-10-24 at 21:21 +0800, Christopher Chan wrote: > >>> I thought the usual ways of doing this were to either use a > >>> high-performance NFS server (netapp filer...) and maildir format so you > >>> can

Re: [CentOS] Large scale Postfix/Cyrus email system for 100,000+ users

2007-10-24 Thread Christopher Chan
Craig White wrote: On Wed, 2007-10-24 at 21:21 +0800, Christopher Chan wrote: I thought the usual ways of doing this were to either use a high-performance NFS server (netapp filer...) and maildir format so you can run imap from any client facing server, or to keep the delivery host information

Re: [CentOS] Large scale Postfix/Cyrus email system for 100,000+ users

2007-10-24 Thread Craig White
On Wed, 2007-10-24 at 21:21 +0800, Christopher Chan wrote: > > I thought the usual ways of doing this were to either use a > > high-performance NFS server (netapp filer...) and maildir format so you > > can run imap from any client facing server, or to keep the delivery host > > information in a

Re: [CentOS] Large scale Postfix/Cyrus email system for 100,000+ users

2007-10-24 Thread Les Mikesell
Christopher Chan wrote: I thought the usual ways of doing this were to either use a high-performance NFS server (netapp filer...) and maildir format so you can run imap from any client facing server, or to keep the delivery host information in an LDAP attribute that you find when validating

Re: [CentOS] Large scale Postfix/Cyrus email system for 100,000+ users

2007-10-24 Thread Christopher Chan
I thought the usual ways of doing this were to either use a high-performance NFS server (netapp filer...) and maildir format so you can run imap from any client facing server, or to keep the delivery host information in an LDAP attribute that you find when validating the address. This is t

Re: [CentOS] Large scale Postfix/Cyrus email system for 100,000+ users

2007-10-24 Thread Les Mikesell
Matt Shields wrote: I'm trying to set up a large scale email system that supports 100,000+ IMAP accounts. We have an existing frontend web interface that does a lookup on a mysql db to figure out which IMAP server to connect to for each user. For the email infrastructure we have decided on Post

Re: [CentOS] Large scale Postfix/Cyrus email system for 100,000+ users

2007-10-24 Thread Ralph Angenendt
Matt Shields wrote: > Because of the way that the infrastructure is (biz reasons) we are not > doing shared storage, we have numerous IMAP servers that we distribute > accounts across. As we add more users, we image up a new IMAP server. > For our business's scaling purposes this was the best pla

Re: [CentOS] Large scale Postfix/Cyrus email system for 100,000+ users

2007-10-23 Thread mouss
mouss wrote: > Matt Shields wrote: >> I'm trying to set up a large scale email system that supports 100,000+ >> IMAP accounts. We have an existing frontend web interface that does a >> lookup on a mysql db to figure out which IMAP server to connect to for >> each user. For the email infrastructur

Re: [CentOS] Large scale Postfix/Cyrus email system for 100,000+ users

2007-10-23 Thread mouss
Matt Shields wrote: > I'm trying to set up a large scale email system that supports 100,000+ > IMAP accounts. We have an existing frontend web interface that does a > lookup on a mysql db to figure out which IMAP server to connect to for > each user. For the email infrastructure we have decided o

Re: [CentOS] Large scale Postfix/Cyrus email system for 100,000+ users

2007-10-23 Thread Christopher Chan
What I am having a problem is how do I get postfix to transfer the email to the particular IMAP server that the user account is on. I know that I need to use lmtp and transport, but all the examples I have seen show forwarding all email to 1 IMAP server. I would like Postfix to do a lookup for

[CentOS] Large scale Postfix/Cyrus email system for 100,000+ users

2007-10-23 Thread Matt Shields
I'm trying to set up a large scale email system that supports 100,000+ IMAP accounts. We have an existing frontend web interface that does a lookup on a mysql db to figure out which IMAP server to connect to for each user. For the email infrastructure we have decided on Postfix and Cyrus. We hav