Re: questions for users of shared mailboxes: conversations

on. den 24. 09. 2025 klokka 16.23 (-0400) skreiv Ricardo Signes via
Info:
> Over time, we're trying to reduce the number of possible configurations of Cyrus.  Every optional feature means more possible configurations, which means more testing and debugging.  A likely candidate for "no longer optional" in the future is the conversations system.  In general, I do not expect this to cause difficulty, but there is one place that it becomes interesting.
> 
> The conversations database is per-user, and so grows in proportion to the user's mail size.  That's the unit you have to scale at.
> 
> For shared, not-user-owned mailboxes, there is no conversationsdb.  If we want to create one, we will need to think about where it goes, and how we scale.  For example, if you're using shared mailboxes to store all of usenet, you may well want to split that up into multiple conversation databases.
> 
> We (Fastmail) do not use shared mailboxes like this.  I am looking for a show of hands or description of use case from anybody out there who is using shared mailboxes like this so we can get a sense of what folks are doing.  (I realize that this is not going to be a scientific survey of all Cyrus IMAP users.)
> 
> Hit reply or reply to me privately.  Thanks!
> 

I am not entirely sure what conversationsdb is used for, but it seems it
used to track threads for mail sent by clients not using References or
In-reply-to correctly?  why would this need to be per-user?

we have not enabled conversationsdb and have not missed the
functionality.  we do need per-user Seen-databases for shared folders,
though, but that is probably not relevant for this development.

-- 
venleg helsing,
Kjetil T.

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