looking for Cyrus mail format documentation

[Phil Howard]

On Sun, Feb 02, 2003 at 08:20:03PM -0500, Rob Siemborski wrote:

| On Sat, 1 Feb 2003, Phil Howard wrote:
| 
| > So this new message was be appended to the same FILE?  That sounds
| > more like the old UNIX mailbox format.
| 
| No.  Same mailbox.
| 
| Two servers are in sync, both with a UIDNEXT of 1000 for a particular
| mailbox.  They suffer a netsplit and both have an APPEND happen,
| regardless of the mailstore implementation, they now both have a different
| concept of what UID 1000 is.
| 
| > | Doing replicated IMAP stores (espeically geographicly distanct ones) is
| > | not an easy problem.
| >
| > It's easy if every message is a separate file.
| 
| This is not true.  It has nothing to do with the implementation of the
| mailstore.

Apparently the way Cyrus does it, there are problems.  But that does
not mean it cannot be done in general.  By keeping a sequential number
and naming the files by that number alone, of course there can be
collisions.  If the original design of the mailstore required being
able to do two-way replication reliably, it would be a matter of
making the file names be more unique, such as using a timestamp plus
hostname.

So basically it comes down to, this isn't possible with Cyrus without
major hacking.

-- 
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| Phil Howard - KA9WGN |   Dallas   | http://linuxhomepage.com/ |
| phil-nospam at ipal.net | Texas, USA | http://ka9wgn.ham.org/    |
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