imap clients say i have 4K messages but spool has 12894 files

[Ken Murchison]

Brian,

Trying running 'unexpunge -l' on the mailbox in question.  This will 
list expunged, but not-yet-removed-from-disk messages.

cyr_expire is used to removed expunged messages from disk.



On 6/3/20 7:30 PM, Ian Willis wrote:
> Hi Brian,
>
> The answer to your question is that yes, UID appears to correlate with 
> the message file name.
> At a guess something appears significantly awry.
>
> To resolve the immediate issue.
> Have you tried create a separate mail user. Copy your existing message 
> over via imap to the new folder.
> Delete and expunge the original mailbox and recreate, recopy.
>
> In the longer term I would be tempted to move to a newer version of 
> cyrus or if you have the patience closely monitor the file-system to 
> debug how this is occurring.
>
> Kind Regards
> Ian
>
> -----Original Message-----
> *From*: Brian J. Murrell <brian at interlinx.bc.ca 
> <mailto:%22Brian%20J.%20Murrell%22%20%3cbrian at interlinx.bc.ca%3e>>
> *To*: info-cyrus at lists.andrew.cmu.edu 
> <mailto:info-cyrus at lists.andrew.cmu.edu>
> *Subject*: Re: imap clients say i have 4K messages but spool has 12894 
> files
> *Date*: Mon, 01 Jun 2020 21:45:42 -0400
>
> On Tue, 2020-05-26 at 09:33 -0400, Brian J. Murrell wrote:
> Hi.
> Every IMAP client I query my cyrus imapd 2.4.17 server with says I
> have
> ~4K messages in my INBOX.  However when I do a listing of
> /var/spool/imap/b/user/brian/ it shows almost 13K files.
> None of these include messages which have been deleted but not
> expunged.  I manually expunge my mailbox many times per day.
> If I'm understanding mbexamine's output correctly, I have files on
> disk
> that are not being displayed by mbexmine.  My understanding of
> mbexamine's output is that on a line formatted as such:
> 000001> UID:00089183   INT_DATE:[redacted] SENTDATE:[redacted]
> SIZE:1537
> that the 00089183 is the reference to the file on the spool in
> /var/spool/imap/b/user/brian/89183.
> Is that correct?  If so, I definitely have files on the disk which
> are
> not found in any "000001> UID" line from mbexamine.  ~9600 of them.
> That seems to make up the difference between what an IMAP client sees
> and how many files are on disk.
> I also have multiple occurrences of the same "000001> UID:" and where
> there are no matching files on the disk.  Should that be possible?
> So how come the huge discrepancies and how do I reconcile them?
> No other thoughts on how I can reconcile this gross discrepancy?
> Ultimately I have an IMAP spool that is growing without bound due to
> messages continuing to live on the spool beyond their life in the index
> and getting orphaned.
> Cheers,
> b.
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-- 
Kenneth Murchison
Senior Software Developer
Fastmail US LLC

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