חדשות, עדכונים, מדריכים ועזרים | עדכוני תוכנות ואפליקציות - (06.03.15) - גרסה חדשה: Dovecot v2.2.16

(06.03.15) - גרסה חדשה: Dovecot v2.2.16

עדכוני תוכנות ואפליקציות

חדשות, עדכונים, מדריכים ועזרים


לפרטים נוספים:
http://www.dovecot.org/doc/NEWS-2.2
http://dovecot.org/list/dovecot-news/20 ... hread.html

להורדה:
http://dovecot.org/releases/2.2/rc/dove ... rc1.tar.gz
http://dovecot.org/releases/2.2/rc/dove ... tar.gz.sig
Looks like it's been a long time since v2.2.15. There have been a ton of changes since it was released though, so here's a release candidate first to find out if somebody can find any bugs before the final v2.2.16.

Unfortunately I haven't had time/energy to read Dovecot mailing list for a while now. I'm hoping this will change, but I don't really expect it to happen anytime soon. On the positive side for Dovecot, it's now becoming used in more and more multi-million user installations, which brings all kinds of nice new improvements.

The largest changes since v2.2.15:

   * dbox: Resyncing (e.g. doveadm force-resync) no longer deletes
     dovecot.index.cache file. The cache file was rarely the problem
     so this just caused unnecessary slowness.
   * Mailbox name limits changed during mailbox creation: Each part of
     a hierarchical name (e.g. "x" or "y" in "x/y") can now be up to 255
     chars long (instead of 200). This also reduces the max number of
     hierarchical levels to 16 (instead of 20) to keep the maximum name
     length 4096 (a common PATH_MAX limit). The 255 char limit is
     hopefully large enough for migrations from all existing systems.
     It's also the limit on many filesystems.

   + director: Added director_consistent_hashing setting to enable
     consistent hashing (instead of the mostly-random MD5 hashing).
     This causes fewer user moves between backends when backend counts
     are changed, which may improve performance (mainly due to caching).
   + director: Added support for "tags", which allows one director ring
     to serve multiple backend clusters with different sets of users.
   + LMTP server: Added lmtp_user_concurrency_limit setting to limit how
     many LMTP deliveries can be done concurrently for a single user.
   + LMTP server: Added support for STARTTLS command.
   + If logging data is generated faster than it can be written, log a
     warning about it and show information about it in log process's
     process title in ps output. Also don't allow a single service to
     flood too long at the cost of delaying other services' logging.
   + stats: Added support for getting global statistics.
   + stats: Use the same session IDs as the rest of Dovecot.
   + stats: Plugins can now create their own statistics fields
   + doveadm server: Non-mail related commands can now also be used
     via doveadm server (TCP socket).
   + doveadm proxying: passdb lookup can now override doveadm_port and
     change the username.
   + doveadm: Search query supports now "oldestonly" parameter to stop
     immediately on the first non-match. This can be used to optimize:
     doveadm expunge mailbox Trash savedbefore 30d oldestonly
   + doveadm: Added "save" command to directly save mails to specified
     mailbox (bypassing Sieve).
   + doveadm fetch: Added body.snippet field, which returns the first
     100 chars of a message without whitespace or HTML tags. The result
     is stored into dovecot.index.cache, so it can be fetched efficiently.
   + dsync: Added -t <timestamp> parameter to sync only mails newer than
     the given received-timestamp.
   + dsync: Added -F [-]<flag> parameter to sync only mails with[out] the
     given flag/keyword.
   + dsync: Added -a <mailbox> parameter to specify the virtual mailbox
     containing user's all mails. If this mailbox is already found to
     contain the wanted mail (by its GUID), the message is copied from
     there instead of being re-saved. (This isn't efficient enough yet
     for incremental replication.)
   + dsync: -m parameter can now specify \Special-use names for mailboxes.
   + imapc: Added imapc_features=gmail-migration to help migrations from
     GMail. See http://wiki2.dovecot.org/Migration/Gmail
   + imapc: Added imapc_features=search to support IMAP SEARCH command.
     (Currently requires ESEARCH support from remote server.)
   + expire plugin: Added expire_cache=yes setting to cache most of the
     database lookups in dovecot index files.
   + quota: If overquota-flag in userdb doesn't match the current quota
     usage, execute a configured script.
   + redis dict: Added support for expiring keys (:expire_secs=n) and
     specifying the database number (:db=n)
   - auth: Don't crash if master user login is attempted without
     any configured master=yes passdbs
   - Parsing UTF-8 text for mails could have caused broken results
     sometimes if buffering was split in the middle of a UTF-8 character.
     This affected at least searching messages.
   - String sanitization for some logged output wasn't done properly:
     UTF-8 text could have been truncated wrongly or the truncation may
     not have happened at all.
   - fts-lucene: Lookups from virtual mailbox consisting of over 32
     physical mailboxes could have caused crashes.