Cyrus 2.2.x vs 2.3

[Ken Murchison]

Scott Russell wrote:

> Greets -
> 
> I'm going to be rebuilding our cyrus imap 2.1.x server in the next month 
> and trying to figure out which version of cyrus I should use next. I 
> understand that 2.2.x is stable and that 2.3.x in CVS is the development 
> however it appears that some sites have jumped to 2.3 anyway. (What 
> really got me thinking about it was when I noticed fastmail.fm has 
> deployed 2.3)
> 
> In general, what are the advantages of 2.3 over 2.2.x for a basic site? 
> We don't use murder but we do use SQL auth, sieve, postfix, and dspam on 
> our IMAP server.
> 
> I guess I'm just curious what the driving factor is that pushes people 
> to use 2.3.x instead of the stable 2.2.x release. :)

Changes to the Cyrus IMAP Server since 2.2.x

     * Added support for "unified" and "replicated" Murders. A Murder no 
longer has to have discrete frontend and backend servers; any one 
"unified" server can both proxy and serve local mailboxes (proxy 
functionality in proxyd and lmtpproxyd has been merged with imapd and 
lmtpd respectively), or all "replicated" servers can serve the same 
mailboxes from a shared filesystem. The new mupdate_config option in 
imapd.conf is used to determine whether a Murder is using a 
"traditional", "unified" or "replicated" configuration.
     * Ported/rewrote/integrated David Carter's mailspool replication 
code. Development sponsored by Columbia University.
     * Added support for "delayed" expunge, in which messages are 
removed from the mailbox index at the time of the EXPUNGE (hiding them 
from the client), but the message files and cache entries are left 
behind, to be purged at a later time by cyr_expire. This reduces the 
amount of I/O that takes place at the time of EXPUNGE and should result 
in greater responsiveness for the client, especially when expunging a 
large number of messages. The new expunge_mode option in imapd.conf 
controls whether expunges are "immediate" or "delayed". Development 
sponsored by FastMail.
     * Added support to place some/all mailbox metadata files (cyrus.* 
files) on a separate (probably high-speed) partition. See the new 
metapartition and metapartition_files options for details. Development 
sponsored by FastMail.
     * Added support for accessing subfolders of INBOX via POP3. See the 
new popsubfolders option for details. Development sponsored by FastMail.
     * Added support to lmtpd to do "fuzzy" mailbox matching on 
user+detail addresses. See the new lmtp_fuzzy_mailbox_match option for 
details. Development sponsored by FastMail.
     * Added new sieve_extensions option to allow individual Sieve 
extensions to be enabled/disabled.
     * The Sieve "include" extension is now supported. This also allows 
for global sieve scripts. See the new sieve_extensions options to enable it.
     * The Sieve "body" extension is now supported. See the new 
sieve_extensions option to enable it. Development sponsored by FastMail.
     * The $text$ variable for Sieve notify messages is now supported. 
Development sponsored by FastMail.
     * The MIME structure of a new message destined for multiple 
recipients is now only parsed once rather than once per delivery, 
resulting in better performance. Development sponsored by FastMail.
     * Support 64-bit quota usage (both per mailbox and for the entire 
quotaroot), based on a patch from Jeremy Rumpf. Development sponsored by 
FastMail.
     * Added new flushseenstate option which causes imapd to immediately 
flush changes in \Seen state to disk rather than caching them until the 
mailbox is closed. Enabling this option may fix \Seen state weirdness 
with MS Outlook, at the expense of performance/scalability. Based on a 
patch by John A. Tamplin (jtampli at sph.emory.edu).
     * The Sieve "copy" extension is now supported.
     * The IMAP "CATENATE" extension is now supported.




-- 
Kenneth Murchison     Oceana Matrix Ltd.
Software Engineer     2495 Main St. - Suite 401
716-604-0088 x26      Buffalo, NY 14214
--PGP Public Key--    http://www.oceana.com/~ken/ksm.pgp