[CentOS] Converting to maildir

Tue Jan 4 14:40:17 UTC 2011
Benjamin Franz <jfranz at freerun.com>

On 01/04/2011 06:14 AM, Adam Tauno Williams wrote:
> On Tue, 2011-01-04 at 15:06 +0100, Dominik Zyla wrote:
>> Many people care about storage format.
> And they are misguided in doing so.  Details of message storage is an
> internal [server's] problem.

No. They are being eminently practical. mbox format's 'one big file' 
approach results in significant I/O overhead for update operations, 
locking complexity (file locks on shared network storage - 'nuff said) 
and bloat in differential backups.

I have literally tens of gigabytes of email stored on our servers. mbox 
storage would make backups slower, take significantly more backup 
storage space and add quite a lot of disk I/O for routine mailbox use as 
well as slow down email for the end users. It is also more prone to 'one 
error took out everything' problems.

The idea that "low level/internal details don't matter" is only true 
when you are so far from your resource limits that they are effectively 
infinite. The real world often isn't that way.

Benjamin Franz