On Thu, 21 Jun 2012 17:29:40 +0200, Móczik Gábor wrote:
> I want cyrus-imapd and dovecot-imapd both installed simultaneously until
> migrating all the mails from Cyrus and testing the new service.
>
> The problem is, that apt want to remove Cyrus if I install dovecot.
What's the exact output you get from apt?
> Is there a technical reason for this restriction?
At a first glance I see none, both packages should be able to coexist in
the same system. A different thing would be that you wanted to use both
services at the same time in the same host using the standard ports...
> I think, it will not cause any problems if I run dovecot on different
> port, and when I finshed the migration and testing I remove Cyrus
> manually.
Yup, I also think so. Having a virtual/spare machine for testing these
things can help in such cases.
> Is there a way not to automatically remove Cyrus?
I wonder what package/rule is the reason for the "break" or "conflict"
here.
> It's not an option to stop IMAP service for hours or so.
I'm curious about the replacement, may I ask why you want to replace
Cyrus for Dovecot?
Greetings,
--
Camaleón
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06-21-2012, 05:30 PM
Móczik Gábor
cyrus --> dovecot
2012.06.21. 18:07 keltezéssel, Camaleón írta:
On Thu, 21 Jun 2012 17:29:40 +0200, Móczik Gábor wrote:
I want cyrus-imapd and dovecot-imapd both installed simultaneously until
migrating all the mails from Cyrus and testing the new service.
The problem is, that apt want to remove Cyrus if I install dovecot.
What's the exact output you get from apt?
progzmaster:~# apt-get install dovecot-imapd
Reading package lists... Done
Building dependency tree
Reading state information... Done
The following packages were automatically installed and are no longer
required:
cyrus-common-2.2 libgssapi2-heimdal libheimntlm0-heimdal
Use 'apt-get autoremove' to remove them.
The following packages will be REMOVED:
cyrus-imapd-2.2
The following NEW packages will be installed:
dovecot-imapd
0 upgraded, 1 newly installed, 1 to remove and 0 not upgraded.
Need to get 1,123 kB of archives.
After this operation, 786 kB disk space will be freed.
Do you want to continue [Y/n]? n
Abort.
Is there a technical reason for this restriction?
At a first glance I see none, both packages should be able to coexist in
the same system. A different thing would be that you wanted to use both
services at the same time in the same host using the standard ports...
On different ports, of course...
Is there a way not to automatically remove Cyrus?
I wonder what package/rule is the reason for the "break" or "conflict"
here.
It's not an option to stop IMAP service for hours or so.
I'm curious about the replacement, may I ask why you want to replace
Cyrus for Dovecot?
I don't know which is better, but it worth a try.
I have read that it is better to administer or recover from a failure,
performs better and more standard-compliant.
I don't know until I try. :-)
However, Cyrus seemed stable for years without significant data loss.
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On Thu, 21 Jun 2012 19:30:40 +0200, Móczik Gábor wrote:
> 2012.06.21. 18:07 keltezéssel, Camaleón írta:
>> What's the exact output you get from apt?
(...)
> The following packages will be REMOVED:
> cyrus-imapd-2.2
> The following NEW packages will be installed:
> dovecot-imapd
(...)
Mmmm... is the same for the pop3 counterparts?
>>> Is there a way not to automatically remove Cyrus?
>>
>> I wonder what package/rule is the reason for the "break" or "conflict"
>> here.
>
> dovecot:
>
> Replaces: dovecot-common, imap-server
> Provides: imap-server
^^^^^^^^^^^
I would contact the Cyrus package maintainers and ask them about this.
The "conflict" flag in cyrus seems too restrictive (although "courier-
imap" also has it), but maybe there's a strong reason for it we can't
see :-?
Greetings,
--
Camaleón
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cyrus --> dovecot
