[Dovecot] using dsync to convert mailboxes looses caching options

[Mark Zealey]

10-12-2011 13:07, Timo Sirainen yazmış:
>> It could well be because of the conversion to sdbox then - the ctime/mtime of the files are not being preserved by dsync (in stock 2.0.16). The date.saved timestamp is only put into the cache on the second dsync run; presumably therefore it picks it up from the filesystem.
> With sdbox the file's mtime isn't even tried to be preserved. The received-time and saved-time are written to the metadata block inside the file.

Ah yes; I saw the R metadata but not the C header key. Looking deeper at 
this I think I was expecting the date.save time to be about the same as 
the date.receive; however the ctime for these files is quite recent 
presumably affected by setting of message flags in a maildir or 
something (we're using nfs). The source cache says:

- date.received: 1301978447 (4f9d9a4d)
- date.save: 1322465550 (0e39d34e)

The message file itself has mtime 1301978447 and ctime 1323514077; and 
in the sdbox header/metadata we have:

C4ee3391a
R4d9a9d4f

so ctime/sdbox C entry are close enough by my calculations (not sure 
where the 61 seconds of difference comes from though). It is a bit 
strange you wouldn't use the source cache's value for date.save if it is 
available as ctime can be pretty unreliable?

Mark