[Dovecot] mdbox packing

[Daniel L. Miller]

On 5/6/2012 8:12 PM, Daniel L. Miller wrote:
> On 5/6/2012 8:09 PM, Daniel L. Miller wrote:
>> On 4/30/2012 5:23 PM, Timo Sirainen wrote:
>>> On Mon, 2012-04-30 at 12:43 -0700, Daniel L. Miller wrote:
>>>> Is there a way to manually force an mdbox storage to be rebuilt 
>>>> into new
>>>> files?  Particularly files of the maximum size?
>>> You could do it with dsync.
>>>
>>>
>> dsync seems to do a marvelous job - new question.?
>>
>> Given a mailbox with a larger number of older mails - assuming any 
>> new mails will have later dates - will the new mail storage files be 
>> identical?  I'm probably not saying the right - let me try this:
>>
>> 1.  "dsync backup mdbox" (with appropriate args) is run for a given 
>> user.
>> 2.  "dsync mirror mdbox" is done just to catch up.
>> 3.  Old mailstore moved off.
>> 4.  New mailstore moved to active location.
>>
>> I'm sure there's a safer way to do the above - but I've got a 
>> low-traffic site and I can just shut down mail service altogether for 
>> a few minutes if I want during this.
>>
>> Now - repeat the above four steps.  Will mail files m.1 through 
>> m.(n-1) be identical to the last run?  Is this a valid packing 
>> strategy prior to performing an rsync type backup - assuming no 
>> changes are being made to the archived mails between pack runs?
>
> Given the above, and SIS - if the backup is performed in the same 
> spool, i.e. original is /var/mail/domain/user, backup is 
> /var/mail/domain/user-new - will this result in any problems with 
> SIS?  If after the pack and rename operation, the old mail tree is 
> simply deleted - will that leave SIS files unreferenced if the user 
> later deletes the messages from their active store?
>

And yet another one - dsync does not APPEAR to be copying ACL's in this 
process.

-- 
Daniel