dovecot - Aug 2010 - maildirsize having incorrect content, how to recreate/correct?

Hi List,

I have (otherwise successfull) migrated a server from cyrus to dovecot
(Mac OS X Server 10.5.8 to 10.6.4 [dovecotd version to be
1.1.20apple0.5]).
There are ca. 300+ users of which a very small handfull (ca. 1 %) are
having reported a usage size that is very different to what 'du'
reports.
How can I rebuild the maildirsize and why might it be wrong in the
first place(?)
Will the maildirsize files be regenerated if deleted and when will
this then happen ( at the next time of the user logging in or?)

>From what I can read here:
http://www.inter7.com/courierimap/README.maildirquota.html
The maildirsize file contains (in linenumber > 1) "bytecount SPACE
filecount"

I also have one (perhaps more) user with one line having a negative
value in maildirsize (-138204393 -2294) how can that happen / be
corrected?

Here's the info for one user with an much to high reporting of usage:

sh-3.2# pwd
/Volumes/RAID-06-low/Mail

sh-3.2# cat 495827A6-7AF5-4017-9F07-67C0B04546EE/maildirsize
0S
281470373004731 4966  ### <- THIS LOOKS VERY WRONG
12113561      138
20047924      204
13553876      334
8064 1
8308 1
25240 1
26117 1


sh-3.2# du -hc 495827A6-7AF5-4017-9F07-67C0B04546EE
 12M	495827A6-7AF5-4017-9F07-67C0B04546EE/.Deleted Messages/cur
  0B	495827A6-7AF5-4017-9F07-67C0B04546EE/.Deleted Messages/new
  0B	495827A6-7AF5-4017-9F07-67C0B04546EE/.Deleted Messages/tmp
 12M	495827A6-7AF5-4017-9F07-67C0B04546EE/.Deleted Messages
  0B	495827A6-7AF5-4017-9F07-67C0B04546EE/.Drafts/cur
  0B	495827A6-7AF5-4017-9F07-67C0B04546EE/.Drafts/new
  0B	495827A6-7AF5-4017-9F07-67C0B04546EE/.Drafts/tmp
4.0K	495827A6-7AF5-4017-9F07-67C0B04546EE/.Drafts
 20M	495827A6-7AF5-4017-9F07-67C0B04546EE/.Sent Messages/cur
  0B	495827A6-7AF5-4017-9F07-67C0B04546EE/.Sent Messages/new
  0B	495827A6-7AF5-4017-9F07-67C0B04546EE/.Sent Messages/tmp
 20M	495827A6-7AF5-4017-9F07-67C0B04546EE/.Sent Messages
 14M	495827A6-7AF5-4017-9F07-67C0B04546EE/.U&APg-nsket e-mail/cur
  0B	495827A6-7AF5-4017-9F07-67C0B04546EE/.U&APg-nsket e-mail/new
  0B	495827A6-7AF5-4017-9F07-67C0B04546EE/.U&APg-nsket e-mail/tmp
 14M	495827A6-7AF5-4017-9F07-67C0B04546EE/.U&APg-nsket e-mail
747M	495827A6-7AF5-4017-9F07-67C0B04546EE/cur    ### <- WHEN COMPARING TO
THIS
 76K	495827A6-7AF5-4017-9F07-67C0B04546EE/new
  0B	495827A6-7AF5-4017-9F07-67C0B04546EE/tmp
792M	495827A6-7AF5-4017-9F07-67C0B04546EE
792M	total


sh-3.2# ls -l
total 352
drwx------     7 jja  mail     238 Aug  7 21:56 .Deleted Messages
drwx------     7 jja  mail     238 Aug  7 21:56 .Drafts
drwx------     7 jja  mail     238 Aug  7 21:56 .Sent Messages
drwx------     7 jja  mail     238 Aug  7 21:56 .U&APg-nsket e-mail
drwx------  4966 jja  mail  168844 Aug  7 21:56 cur   ### <- AND WHEN
COMPARING TO THIS
-rw-r--r--     1 jja  mail      11 Aug  7 21:56 dovecot-keywords
-rw-------     1 jja  mail  108509 Aug  9 15:01 dovecot-uidlist
-rw-------     1 jja  mail   24808 Aug  9 14:26 dovecot.index
-rw-------     1 jja  mail   25288 Aug  9 15:01 dovecot.index.log
-rw-r--r--     1 jja  mail     147 Aug  9 15:01 maildirsize
drwx------     6 jja  mail     204 Aug  9 15:01 new
-rw-r--r--     1 jja  mail      76 Aug  7 21:56 subscriptions
drwx------     2 jja  mail      68 Aug  9 15:01 tmp



- TvE

On 10.8.2010, at 10.45, Thomas von Eyben wrote:
> How can I rebuild the maildirsize and why might it be wrong in the
> first place(?)
> Will the maildirsize files be regenerated if deleted and when will
> this then happen ( at the next time of the user logging in or?)
Yes, deleting will cause it to be rebuilt when quota is next used (e.g. new mail
is delivered or client issues GETQUOTA command or something).
> I also have one (perhaps more) user with one line having a negative
> value in maildirsize (-138204393 -2294) how can that happen
See if it keeps happening.. maildirsize in general isn't 100% reliable, but
it shouldn't be far off from the actual usage.