Re: Different mailbox-pathes in SLES and Ubuntu

Thomas,
Patrick is correct about the hash settings.  You would be well advised, 
however, to please review the Cyrus documentation more completely before 
migrating from 2.4.19 to 3.4.3.  This is a very big shift, and one 
cannot expect to succeed by following the copy (or rsync) and 
reconstruct scheme.

To understand hashing, you should review the link Patrick sent.  To 
understand the locations of the state and spool files, you should read 
the whole chapter, File & Directory Locations 
<https://www.cyrusimap.org/imap/reference/admin/locations.html#file-directory-locations>.  
The imapd.conf(5) which comes with the Ubuntu packaging, based on your 
description, sets different defaults than the factory settings.  This 
should be explained in the documentation which accompanies your packages.

Lastly, I would strongly recommend reviewing the sections on Upgrading 
to 3.4 
<https://www.cyrusimap.org/imap/download/upgrade.html#upgrading-to-3-4>.  
And make sure to review release notes, as there are often breaking 
changes which you'll want to know about.  In almost all cases solutions 
are provided to work around breaking changes. Also, while you may be 
focusing on the mail spool, you must pay as much, or more, attention to 
the state directories, which hold the databases which glue together all 
of the data.  If you're coming from 2.4 there's a good chance those are 
Berkeley DB, which is no longer supported, so you'll need to convert 
them.  Fear not, the tools are all provided.

You may find it easier to try using a tool like imapsync 
<https://imapsync.lamiral.info/>, which uses IMAP protocol to sync your 
old server to the new, and lets one work around any incompatibilities 
introduced along the way.  But everything you need to successfully 
upgrade from 2.4.9 to 3.4.3 can be found on the cyrusimap.org site.

Cheers,
     -nic

On 11/13/22 15:23, Patrick Boutilier wrote:
> On 2022-11-13 11:11, [email protected] wrote:
>> Hello,
>> I got the task, to migrate a cyrus imapd installation from an old 
>> SLES 12 with cyrus imapd 2.4.19
>> to an ubuntu-machine with ubuntu 22.04 LTS with cyrus imapd 3.4.3.
>>
>> I'm not very familar with that stuff.
>>
>> My first problem: The path to the mailboxes on the old system is 
>> /var/spool/imap/user/. In this directory there are all the user 
>> mailboxes.
>> But on the ubuntu-Server the mailbox-path-structure is as follows: 
>> /var/spool/cyrus/mail/[a-z]/user.
>>
>> I can't find any setting, where I can manipulate this. Does this path 
>> depend on the OS ? Or on the cyrus imapd version ?
>>
>> My plan was to copy the mailboxes to the new server and start a 
>> reconstruct.
>>
>> But how will I do that ? Do I have to sort the users into the 
>> alphabetical ordered directory structure "manually" ?
>> Or can I keep my old structure ?
>
> The Ubuntu server has "hashimapspool" set to true it seems. And 
> possibly "fulldirhash" as well. You can set these to false if the 
> Ubuntu server doesn't have any live data as changing that setting will 
> break things.
>
>
>
> https://www.cyrusimap.org/imap/reference/admin/locations/hashing.html
>
>
>
>
>
>>
>> thanks
>>
>> Thomas
>>
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-- 
Nic [email protected]
https://www.nicbernstein.com

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