similar to: Migrating from Maildir to dbox+SIS... sdbox or mdbox?

Hello We are now running dovecot 2.0.9 with indexes in a ram disk and maildir storage in a test system. We have the following questions: - If there is a power outage / kernel crash, we will lose the content of ramdisk. We have tested that indexes are regenerated when a user logs in via imap, so e-mail access will be "slower" after a power outage / kernel crash, but

Hello, So ive spent the last 45 minutes or so searching the list for dbox stuff, but Im not seeing anything real definitive. My question is basically whether the dbox format is ready for production environment, is sdbox or mdbox more stable/ready than the other or does it matter? What are people's experience/review with running this format (and if you reply can you tell me which one

Hello Jack, yes, I imagine I'll have to do some work on tuning the block size on cephfs. Thanks for the advise. I knew that using mdbox, messages are not removed but I though that was true in sdbox too. Thanks again. We'll soon do benchmarks of sdbox vs mdbox over cephfs with bluestore backend. We'll have to do some some work on how to simulate user traffic, for writes and readings.

We will be deploying a replacement Dovecot server soon, and we are planning to use maildir for the primary storage, but with an archive namespace using mdbox (or perhaps sdbox), and SIS. Our backup servers and (luke)warm spare server need to obtain full copies of the mail store. For the maildirs I know I can simply use rsync (we already use it here). I'm a little wary of using rsync with

Thanks Jack. That's good to know. It is definitely something to consider. In a distributed storage scenario we might build a dedicated pool for that and tune the pool as more capacity or performance is needed. Regards, Webert Lima DevOps Engineer at MAV Tecnologia *Belo Horizonte - Brasil* *IRC NICK - WebertRLZ* On Wed, May 16, 2018 at 4:45 PM Jack <ceph at jack.fr.eu.org> wrote:

Hi, some time back we had similar discussions when we, as an email provider, discussed to move away from traditional NAS/NFS storage to Ceph. The problem with POSIX file systems and dovecot is that e.g. with mdbox only around ~20% of the IO operations are READ/WRITE, the rest are metadata IOs. You will not change this with using CephFS since it will basically behave the same way as e.g. NFS. We

Hi:&nbsp; &nbsp;I did a simple test with Dovecot-2.3.9:&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; First step : A test account uses mdbox format to store emails with 'mail_location = mdbox:%h/%Ld/%Ln:ALT=%h/altstorage/%Ld/%Ln', &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; Second step: I adjust 'mail_location = auto:' &nbsp;and dovecot

On April 23, 2019 10:54:38 PM luckydog xf <luckydogxf at gmail.com> wrote: > Is it worthwile to use dbox? seeing from > http://www.linuxmail.info/mbox-maildir-mail-storage-formats/ it may cause > file lock and easy to corrupt. As with everything - it depends. You're asking me so these are *my* opinions - and I do not claim to be anything more than a hobbyist/tinkerer when

I've updated http://wiki2.dovecot.org/MailLocation regarding a typical mail_location entry for dbox. Previously it said: mail_location = dbox:~/dbox but of course "dbox" is now the old name for "sdbox", so the example should be updated to say "sdbox" and there might/ought also to be an example for "mdbox". In

I'm sending this message to both dovecot and ceph-users ML so please don't mind if something seems too obvious for you. Hi, I have a question for both dovecot and ceph lists and below I'll explain what's going on. Regarding dbox format (https://wiki2.dovecot.org/MailboxFormat/dbox), when using sdbox, a new file is stored for each email message. When using mdbox, multiple

Ok, now to work out the precise method (config for the target server and dsync command) to use to perform the migration from the old server to the new one, converting to dbox (s or m, depending on how the other thread discussing this turns out). I'll update the old server to 2.2.10 tomorrow morning so they're both at the same version. So, assuming both servers are running 2.2.10,

Hi! I'm not sure is it the same as described by Andrew Lewis, this is whay i'm posting. Log is: 2011-03-31T17:40:08.369598+02:00 hermes dovecot: imap-login: Login: user=<marcin at mejor.pl>, method=PLAIN, rip=62.121.127.119, lip=193.238.12.139, mpid=19221, TLS 2011-03-31T17:40:08.684562+02:00 hermes dovecot: imap(marcin at mejor.pl): Error: Corrupted dbox file

> Probably not the answer you want - but I would strongly suggest using > Dovecot replication.? Dovecot replication Just Works - so don't reinvent > the wheel when Timo provided such a polished tool already.? Okay, thanks, I'll look at replication for the warm spare. Although we do use shared folders, which your link below says don't work properly. > And based on > my

On Wed Apr 24 2019 04:12:30 GMT-0400 (Eastern Standard Time), Daniel Miller via dovecot <dovecot at dovecot.org> wrote: > If you've got good hardware, including a proper UPS, I'd recommend dbox > (my server is presently using sdbox). With large mailboxes and > file-based backups you'll benefit from mdbox. When reliability is the #1 > concern above anything else - use

Hello I have read carefully about dbox (/http://wiki2.dovecot.org/MailboxFormat/dbox/) and I have some questions: - One of the main advantages (speed wise) of dbox over maildir is that index files are the only storage for message flags and keywords. What happens when we want to recover some messages from backup? With maildir we can rebuild message indexes, but I am not sure about

I'm facing some issues on mdbox based backups. Backups are failing with dbox corruption messages. SiS is the greatest advantage though. However backups integrity is very important. If SiS/Deduplication is not a requirement stick to Maildir. Regards DP -----Original Message----- From: dovecot [mailto:dovecot-bounces at dovecot.org] On Behalf Of Gedalya Sent: 20 April 2018 08:19 To: dovecot at

Hi Guys, I've been desperately trying to find some comparative performance information about the different mailbox formats supported by Dovecot in order to make an assessment on which format is right for our environment. This is a brand new build, with customer mailboxes to be migrated in over the course of 3-4 months. Some details on our new environment: * Approximately 1.6M+

Hello Actually we use MBOX format for all our IMAP access but users complain they cannot create subfolders in imap folders, of course they cannot because of MBOX format ... I need gurus advices on changing mailbox format Maildir of Dbox ? What would be the safest way to go ? Note : we extensively use Thunderbird here. Thanks

Hello, Thanks. Are there any performance or stability advantages Sdbox over Maildir? I'm also thinking ease of encryption an Sdbox or Mdbox vs Maildir? Thanks. Dave. On 5/28/19, Ralph Seichter via dovecot <dovecot at dovecot.org> wrote: > * David Mehler via dovecot: > >> Any help appreciated. > > https://wiki.dovecot.org/Migration/MailFormat > > -Ralph >

using rc3 and with the latest pigeonhole, I had problems with dovecot (deliver) keeping up with high volumes of E-mail. I tried sdbox, mdbox, and cyrdir all with similar (failed) result. using the default Maildir I had no problems. I did not try mbox. The problems seemed to happen when there were multiple deliver's running to the same folder I had defined in my sieve rules, either it would