Re: load balancing at fastmail.fm

2007-02-12 Thread Marten Lehmann
Hello, what do you think about moving the mailspool to a central SAN storage shared via NFS and having several blades to manage the mmapped files like seen state, quota etc.? So still only one server is responsible for a certain set of mailboxes, but these SAN boxes have nice backup and

Re: load balancing at fastmail.fm

2007-02-12 Thread David Newman
-BEGIN PGP SIGNED MESSAGE- Hash: SHA1 On 2/12/07 5:41 AM, Marten Lehmann wrote: Hello, what do you think about moving the mailspool to a central SAN storage shared via NFS and having several blades to manage the mmapped files like seen state, quota etc.? So still only one server is

Mail cluster with Murder or Perdition and MySQL: what is best and how to do?

2007-02-12 Thread Igor Zhbanov
Hello! I want to build load-balanced mail system with LVS, Postfix, Cyrus IMAP, MySQL and Murder or Perdition. For now I plan to use two nodes for storing users' mailboxes (each node will store one half of mailboxes). First, incoming mail will come to Postfix. But where (at what node) Postfix

Cyrus + LDAP = death by 13

2007-02-12 Thread Konstantin V. Gavrilenko
Hi list, I have a problem with my cyrus server that I managed to track to the presence of the LDAP on the system. The user and group information is obtained form the LDAP server. When this functionality is enabled, when I start cyrus I get the following error: Feb 12 14:58:12 pingo

Re: Mail cluster with Murder or Perdition and MySQL: what is best and how to do?

2007-02-12 Thread Rudy Gevaert
Igor Zhbanov wrote: Hello! I want to build load-balanced mail system with LVS, Postfix, Cyrus IMAP, MySQL and Murder or Perdition. A note on LVS with perdition (launched from xinetd): set the KEEPALIVE flag to true if you are using xinetd. For now I plan to use two nodes for storing

Re: load balancing at fastmail.fm

2007-02-12 Thread David Carter
On Mon, 12 Feb 2007, Marten Lehmann wrote: what do you think about moving the mailspool to a central SAN storage shared via NFS and having several blades to manage the mmapped files like seen state, quota etc.? Why do you need NFS? The whole point of a SAN is distributed access to storage

Re: Thunderbird + Kerberos 5 + Cyrus SASL-and-IMAP?

2007-02-12 Thread Jeff Blaine
If anyone wants to assist in testing, here is the bug report I filed just now: https://bugzilla.mozilla.org/show_bug.cgi?id=370178 Cyrus Home Page: http://cyrusimap.web.cmu.edu/ Cyrus Wiki/FAQ: http://cyrusimap.web.cmu.edu/twiki List Archives/Info:

New messages stop showing up in Outlook 2000 SP3

2007-02-12 Thread James Miller
Hi everyone, I have a user running Outlook 2000 and new messages stopped showing a few days ago. After running reconstruct once, two new messages showed up, but subsequent runs have not had any affect. I have about 50 users running a mix of various Outlooks, Thunderbird and Eudora and none one

Re: New messages stop showing up in Outlook 2000 SP3

2007-02-12 Thread Warren Turkal
On Monday 12 February 2007 10:56, James Miller wrote: So, I'm not sure if this is an Outlook issue or cyrus-imap issue -- I'm leaning towards it being something wrong with that profile on Outlook since if he switches to Tbird all of the messages show up just fine -- and I had him create a

Re: load balancing at fastmail.fm

2007-02-12 Thread Marten Lehmann
Hello, Why do you need NFS? because NFS is the only standard network file protocol. I don't want to load a proprietary driver into the kernel to access a SAN device. The whole point of a SAN is distributed access to storage after all :). So where's the point? SANs usually have redundant

Re: load balancing at fastmail.fm

2007-02-12 Thread David Carter
On Mon, 12 Feb 2007, Marten Lehmann wrote: because NFS is the only standard network file protocol. I don't want to load a proprietary driver into the kernel to access a SAN device. Fair enough, although NFS is likely to be really rather slow compared to a block device which just happens to

Re: load balancing at fastmail.fm

2007-02-12 Thread urgrue
David Carter wrote: Why do you need NFS? The whole point of a SAN is distributed access to storage after all :). SAN distributes the disk, not the filesystem. I presume in this case hes not using the SAN for its multiple-client-access features but just because its fast/reliable. Some

Re: load balancing at fastmail.fm

2007-02-12 Thread David Newman
-BEGIN PGP SIGNED MESSAGE- Hash: SHA1 On 2/12/07 11:01 AM, David Carter wrote: I would be surprised if NFS worked given that it is only a approximation to a real Unix filesystem. Cyrus really hammers the filesystem. NFS does not work with cyrus. Been there, done that, didn't like the

Re: load balancing at fastmail.fm

2007-02-12 Thread Rob Mueller
Fastmail dont use SAN, as I understand they use external raid arrays. There are many ways to lose your data, one of these being filesystem error, others being software bugs and human error. Block-level replication (typically used in SANs) is very fast and uses few resources but doesnt protect

Re: load balancing at fastmail.fm

2007-02-12 Thread urgrue
If it's using block level replication, how does it offer instant recovery on filesystem corruption? Does it track every block written to disk, and can thus roll back to effectively what was on disk at a particular instant in time, so you then just remount the filesystem and the replay of the

Re: load balancing at fastmail.fm

2007-02-12 Thread David Lang
On Mon, 12 Feb 2007, urgrue wrote: If it's using block level replication, how does it offer instant recovery on filesystem corruption? Does it track every block written to disk, and can thus roll back to effectively what was on disk at a particular instant in time, so you then just remount

Re: Thunderbird + Kerberos 5 + Cyrus SASL-and-IMAP?

2007-02-12 Thread Jeff Blaine
GSSAPI authentication from Thunderbird to Cyrus IMAP works! You MUST: 1. Specify a FQDN for your IMAP server in Thunderbird's account settings. I was specifying an IP address. Not good enough. 2. The FQDN must resolve somehow. For me, it was a matter of adding info to

Re: load balancing at fastmail.fm

2007-02-12 Thread Rob Mueller
I agree of course about avoiding SPOFs, but I do like a multi-tiered approach, I mean multiple lines of defense. I use SAN for its speed, reliability, and ease of administration, but naturally I replicate everything on the SAN and have true backups as well. So you have multiple SAN's? Or