Ulrich Spoerlein wrote: > On Sat, 23.06.2007 at 22:34:33 -0300, Patrick Boutilier wrote: >> Daniel O'Connor wrote: >>> On Sunday 24 June 2007 07:37, Gary Mills wrote: >>>> For only 30 gigabytes, you might be better off just copying the files >>>> over, with IMAP down. It could only take a few hours. You can copy >>>> a sample from the live system to get an idea of the timing. >>> You could rsync the mail spool while it is live, take it down and then >>> rsync again. >>> >>> That should save considerable time as I would imagine the vast majority >>> of email would be unchanged between the first & second copy. >> But unfortunately rsync will still have to scan each file to determine >> what has changed, and that can chew up a lot of time. > > Better than to speculate is to measure. > Time the rsync of the mailboxes to your new server. *Don't* shutdown > cyrus, but rsync right again. Measure the second run, too. This will > roughly be your expected downtime. I would be surprised if it is more > than 5-10 minutes. Depends on how many files are on the filesystem. I have done this kind of move before and to speed things up I did a seperate rsync for each of the letters (A-W) in the mail partition. > > You could also do: rsync (long time), rsync (short time), shutdown > cyrus, rsync (even shorter time). > > hth > Ulrich Spoerlein ---- Cyrus Home Page: http://cyrusimap.web.cmu.edu/ Cyrus Wiki/FAQ: http://cyrusimap.web.cmu.edu/twiki List Archives/Info: http://asg.web.cmu.edu/cyrus/mailing-list.html
