On Fri, 11 May 2012, David Mayo wrote: > We are looking at upgrading from Cyrus IMAP 2.3 to 2.4. We run a Murder > with one front end server and one back end server. We plan to XFER > mailboxes from the old back end to a new back end server with more storage. > > From the mailing list I understand we should upgrade the front end > server first before transferring mailboxes. > > My planned changes for the front end server are to add the > suppress_capabilities directive to imapd.conf, ensure the lock directory > is created on tmpfs and touch a blank user_deny.db. My expectation is > that I can stop the front end server, upgrade the software and restart > it with the updated imapd.conf. > > As far as the front end upgrade is concerned, is there really any > difference between the behaviour of 2.3 vs 2.4? Most of the changes > appear to be focused on the mailbox handling code. Does anyone running a > Murder have experience of the upgrade from 2.3 to 2.4 they could share? > Will users notice any difference at this stage? >From my notes: 5. Stop cyrus on frontends 6. Upgrade cyrus-mm to v2.4 7. Switch all cyrus servers to improved_mbox_sort 8. Upgrade cyrus-fe[123] to v2.4 and some more detailed notes on those steps: Switch all cyrus servers to improved_mbox_sort ---------------------------------------------- cd /var/spool/cyrus/config /etc/init.d/cyrus stop /usr/local/cyrus/bin/ctl_mboxlist -d > mailbox_list.txt mv mailboxes.db mailboxes.db.unsorted add "improved_mboxlist_sort: 1" to /etc/imapd.conf /usr/local/cyrus/bin/ctl_mboxlist -u < mailbox_list.txt /etc/init.d/cyrus start Upgrade cyrus-fe[123] to v2.4 ------------------------ /etc/init.d/cyrus stop make install # clean out db dir rm /var/spool/cyrus/config/db/* # suppress new 2.4 capabilities in imapd.conf: suppress_capabilities: ESEARCH LIST-EXTENDED QRESYNC WITHIN XLIST ENABLE SORT=DISPLAY /etc/init.d/cyrus start I upgraded the backends by simply transferring the mailboxes to new backend servers that were running v2.4. This also spread out the load of re-indexing all the mailboxes. I haven't removed the suppress_capabilities settings from the frontends yet, so I don't think my users have seen any difference. Andy ---- Cyrus Home Page: http://www.cyrusimap.org/ List Archives/Info: http://lists.andrew.cmu.edu/pipermail/info-cyrus/
