[Dovecot] Test migration (IMAP copy) and INTERNALDATE?

[Apps Lists]

> On Mon, 2006-04-24 at 10:40 -0400, Apps Lists wrote:
>> > On Mon, 2006-04-24 at 07:47 -0400, Apps Lists wrote:
>> >> The test system is Centos 4.3 (Final) running kernel 2.6.9-34.ELsmp
>> #1 SMP.
>> >>
>> >> I tested this with NFS and local ext3.   The mtime is initially set
>> properly, but gets changed to current system time sometime later on
>> in the copy process.   I moved the mtime change code around and
>> managed to work around this, although I'm sure there's a more
>> elegant approach.
>> >>
>> >> The patch is here on the list.
>> >
>> > Umm. Where?
>>
>> It did indeed make it to the list...  Let me know if you don't have it
>> and I'll resend privately.
>
> Ok, saw it now. But doing it after link() is a bit too late. It's
> possible that another process could have seen the file at that point
> with the wrong timestamp. Also I don't think link() should update mtime,
> and it doesn't with me, neither with ext3 nor with NFS.
>
> What if you try it manually?
>
> stat somefile
> ln somefile somefile2
> stat somefile2
>
> Only "Change" time should have changed, "Access" and "Modify" should be
> the same. Or if you don't have stat, I guess ls -l is enough as long as
> the mtime is old enough..

Hi Timo.

I knew I was introducing a race condition, but needed a quick fix for
testing.  This isn't producton yet.  :)

I also did the same tests you recommended prior to making the source
change.  The ln doesn't seem to affect mtime.  There has to be something
else going on... what, I have no idea.

For giggles, the "ln test" is below.

Steve

root at dev3.neonova.net:/root# touch dovecot-test
root at dev3.neonova.net:/root# stat dovecot-test
  File: `dovecot-test'
  Size: 0               Blocks: 0          IO Block: 4096   regular empty
file
Device: fd00h/64768d    Inode: 16402       Links: 1
Access: (0644/-rw-r--r--)  Uid: (    0/    root)   Gid: (    0/    root)
Access: 2006-04-25 07:16:41.000000000 -0400
Modify: 2006-04-25 07:16:41.000000000 -0400
Change: 2006-04-25 07:16:41.000000000 -0400
root at dev3.neonova.net:/root# ln dovecot-test test-dovecot
root at dev3.neonova.net:/root# stat test-dovecot
  File: `test-dovecot'
  Size: 0               Blocks: 0          IO Block: 4096   regular empty
file
Device: fd00h/64768d    Inode: 16402       Links: 2
Access: (0644/-rw-r--r--)  Uid: (    0/    root)   Gid: (    0/    root)
Access: 2006-04-25 07:16:41.000000000 -0400
Modify: 2006-04-25 07:16:41.000000000 -0400
Change: 2006-04-25 07:16:58.000000000 -0400
root at dev3.neonova.net:/root#