Piecemeal migration

[Robert Scussel]

After migrating multiple times, both with ImapSync and manually, and
between Local accounts and Virtual accounts, I agree that ImapSync is the
easiest way to migrate piecemeal or in it's entirety unless there is some
sort of time constraint to get it done quickly. 

Thanks,
B

On Fri, 18 Apr 2008 14:44:02 +0200, "Alain Spineux" <aspineux at gmail.com>
wrote:
> On Mon, Apr 14, 2008 at 5:42 PM, Shelley Waltz <shwaltz at cabm.rutgers.edu>
> wrote:
>> I wish to migrate imap accounts from my current cyrus-imapd-2.2.3-4 on
> RHEl3
>>  to cyrus-imapd-2.3.7 on RHEL5.  I have the new server installed and the
> db
>>  formats will ramin the same on both servers except for deliver.db and
>>  tls_sessions.db which will change from berkeley to skiplist.  My
>>  understanding is that I can simply start with fresh db on the new
> server
>>  and do not need to migrate these(copy and convert).
>>
> 
> Right
> 
>>  I will be migrating about 250 accounts of 1GB or less.  I need to do
> these in
>>  5-10 at a time to minimize complications and downtime.  Last time I did
>>  this, it worked out well, migrating from 1.6 to 2.2 even though I did
> need
>>  to convert dbs.  I will set up alias forwarding for the migrated
> accounts
>>  and once all migrated, change TTL on DNS and modify records to move
>>  completely to new server.
>>
>>  I know I need to copy from olde server to new server,
>>  (1) /var/lib/imap/user/"a-z"/"username".sub,seen
>>  (2) /var/lib/quota/"a-z"/user."username"
>>  (3) /var/lib/imap/sieve/"a-z"/"username"/
>>  and
>>  (4)/var/spool/imap/"a-z"/user/"username"/
>>
>>  Additionally, and this was the sticky part the last time, is the
>>  mailboxes.db which contains the INBOX/folder structure.  Last time, I
>>  migrated my LDAP database(for authentication) and the entire
>>  mailboxes.db(dumped to flatfile and then recreated on the new server)
>>  before beginning to migrate the accounts in batches.  The issue arose,
>>  however, of this being out of sync with some mailboxes in time as users
>>  changed their folders.  Soooo, my question is, is there a way to update
> or
>>  add new mailboxes individually using the flatfile information I can
>>  extract from the old server?  Can one easily do this without stopping
> the
>>  server?
> 
> Do you know imapsync ?
> It can synchronize two imap mailbox, including SEENand ACL (but not
> quota or sieve script)
> You can sync all mailboxes at once using the cyrus manager account:
> 'cyrus'
> Here is a script I used for testing, I use ssh port fowarding to bypass
> IMAPS
> not very well supported by current imapsync
> 
> # /bin/bash
> S_HOST=localhost
> T_HOST=fc8asx
> 
> S_USER=cyrus
> T_USER=cyrus
> 
> S_PASSWD=******
> T_PASSWD=******
> 
> DOMAIN=mydomain.loc
> 
> ssh -f -L 8143:127.0.0.1:143 $T_HOST sleep 60
> /kolab/bin/perl -I/kolab/lib/emailgency/perl /usr/bin/imapsync \
>                 --host1 $S_HOST --user1 $S_USER --authuser1 $S_USER
> --password1 $S_PASSWD \
>                 --host2 127.0.0.1 --port2 8143 --user2 $T_USER
> --authuser2 $T_USER --password2 $T_PASSWD \
>                 --include "^user/.*@${DOMAIN}" \
>                 --syncacls \
> 
> /kolab/lib/emailgency/perl  contains perl-Mail-IMAPClient-2.2.9
> because imapsync like it
> 
> Hope this help regards
> 
>>
>>  Any suggestions are greatly appreciated!
>>  S.Waltz
>>  ----
>>  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
>>
> 
> 
> 
> --
> Alain Spineux
> aspineux gmail com
> May the sources be with you
> ----
> Cyrus Home Page: http://cyrusimap.web.cmu.edu/
> Cyrus Wiki/FAQ: http://cyrusimap.web.cmu.edu/twiki
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