dovecot - Aug 2022 - Should one prevent reconnection before expunge?

On Fri, 12 Aug 2022, Jack Cecil wrote:
> could you help me understand the 'doveadm expunge' feature better?
>
> If a Maildir has 20 thousand messages and user is reading it over IMAP 
> I have a suspicion it is not a good idea to be rewriting the dovecot 
> index and cache at the same time.
>
> Should I temporarily prevent login (e.g. with passwd-file deny) and 
> then kick them before the expunge?
Hi. Could someone please drop me a hint? I have 309 users that will be 
very angry with me if their Thunderbirds start displaying 0 messages :(

Thanks.

On August 21, 2022 12:34:46 AM GMT+02:00, Jack Cecil <postman at
sysphere.org> wrote:
>On Fri, 12 Aug 2022, Jack Cecil wrote:
>
>> could you help me understand the 'doveadm expunge' feature
better?
>> 
>> If a Maildir has 20 thousand messages and user is reading it over IMAP
I have a suspicion it is not a good idea to be rewriting the dovecot index and
cache at the same time.
>> 
>> Should I temporarily prevent login (e.g. with passwd-file deny) and
then kick them before the expunge?
>
>Hi. Could someone please drop me a hint? I have 309 users that will be very
angry with me if their Thunderbirds start displaying 0 messages :(
>
>Thanks.
I had never thought about this, i do have some folders for which i expunge
message with doveadm with a cron job, never had a problem.

What keeps you from testing with a test account to see what happens when you
expunge while logged in? My assumption is, the client will update it's
knowledge of the mailbox on next access or login.
-- 
Christian Kivalo