Dovecot 2.2.16: disappearing messages, mismatched summaries, duplicated messages, excessive full re-downloads

[David Gessel]

-------- Original Message --------
Subject: Re: Dovecot 2.2.16: disappearing messages, mismatched summaries, duplicated messages, excessive full re-downloads
From: Edgar Pettijohn III <edgar at pettijohn-web.com>
To: David Gessel <gessel at blackrosetech.com>
Date: Sat Apr 18 2015 17:20:30 GMT+0300 (Arabic Standard Time)

> 
> On Apr 18, 2015, at 9:09 AM, David Gessel wrote:
> 
>> Edgar, thanks for the help!
>>
>> -------- Original Message --------
>> Subject: Re: Dovecot 2.2.16: disappearing messages, mismatched summaries, duplicated messages, excessive full re-downloads
>> From: Edgar Pettijohn III <edgar at pettijohn-web.com>
>> To: David Gessel <gessel at blackrosetech.com>
>> Date: Sat Apr 18 2015 16:30:07 GMT+0300 (Arabic Standard Time)
>>
>>>
>>> On Apr 18, 2015, at 8:00 AM, David Gessel wrote:
>>>
>>>>
>>>>
>>>> -------- Original Message --------
>>>> Subject: Re: Dovecot 2.2.16: disappearing messages, mismatched summaries, duplicated messages, excessive full re-downloads
>>>> From: Timo Sirainen <tss at iki.fi>
>>>> To: David Gessel <gessel at blackrosetech.com>
>>>> Date: Sat Apr 18 2015 15:48:28 GMT+0300 (Arabic Standard Time)
>>>>
>>>>> No. My best guess is that (your) ZFS+FreeBSD is simply not behaving the way Dovecot wants filesystems to behave (readdir() sometimes skipping over files). I don't have any other suggestion than trying a different filesystem or OS. I haven't heard ZFS having these problems before though.
>>>>
>>>>
>>>> Or migrating to sdbox.  Absent any further suggestions, that will be my next step.  My commitment to Maildir is far lower than my commitment to FreeBSD/ZFS.  It is just a historical preference coming from a decade+ of courier IMAP. 
>>>
>>>
>>>
>>> What is the output for:
>>>
>>> # zpool status
>>>
>>> perhaps you have a hardware issue?
>>>
>>
>> All good - quite reliable hardware:  IBM x3655 dual AMD quad core, 40GB of ECC RAM, 8x IBM 2.5" SAS on battery-backed ServeRAID, RAID 6 and (somewhat pointlessly) ZFS2.  All IBM server diagnostics check, full RAM check run without errors, no ECC corrections reported, no uncorrectable errors reported. 
>>
>>
>>
>> # zpool status
>>  pool: bootpool
>> state: ONLINE
>>  scan: none requested
>> config:
>>
>>        NAME        STATE     READ WRITE CKSUM
>>        bootpool    ONLINE       0     0     0
>>          aacd0s1a  ONLINE       0     0     0
>>
>> errors: No known data errors
>>
>>  pool: zroot
>> state: ONLINE
>>  scan: none requested
>> config:
>>
>>        NAME            STATE     READ WRITE CKSUM
>>        zroot           ONLINE       0     0     0
>>          aacd0s1d.eli  ONLINE       0     0     0
>>
>> errors: No known data errors
> 
> 
> are you using compression? If so which.
> 


Yes, lz4.