Same problem here, any hint about a fix or workaround?
Regards
Javier
We follow the guidelines about timekeeping RHEL in vmware vsphere located here
http://kb.vmware.com/selfservice/microsites/search.do?language=en_US&cmd=displayKC&externalId=1006427
These problems happens in peak hour
We are very happy with mdbox+zlib+ext4 + iSCSI SAN (HP Lefthand in
our setup)
If you have CPU to spare, consider using zlib with mdbox. You are
trading CPU power (cheap) to get fewer IOPS (IOPS count is expensive).
Mdbox has halved our backup windows (2,8 TB uncompressed mailboxes, 2 T
or SSD for indexes. Indexes are hammered in mdbox.
Regards
Javier
Am Dienstag, 8. November 2011, 15:15:39 schrieb Javier de Miguel Rodríguez:
Hi,
If you have CPU to spare, consider using zlib with mdbox. You are
trading CPU power (cheap) to get fewer IOPS (IOPS count is expensive).
Even without LDA/LMTP dovecot-imap needs to write right? It would
need to update the index every time an imap connect happens and
new mails are found in the mail store.
Well of course. Indexes are also updated when flags are modified, moved
a messages, delete a message, etc.. But in my setup th
On 17 de noviembre de 2010 at 13:30 Frank Bonnet wrote:
> Hello
>
> This is a bit off Dovecot but ...
Hmm...
You can accomplish that in several ways:
1º Use inotify to rsync when mbox file changes (I recommend maildir for this,
you do not have to copy the whole file)
2º Use replicated s
Thank you very much for all the responses in this thread. Now I have
more questions:
- I have "slow" I/O (about 3.5000-4.000 IOPS, measured via
imapsync), if I enable zlib compression in my maildirs, that should
lower the number the IOPS (less to read, less to write, less IOPS, more
CPU
On Thu, 23 Dec 2010 11:27:45 -0800, Marc Perkel
wrote:
SSD drives are very fast but expensive. So I have a crude idea that
I'd like to see. May not be practical but would like to get some
thoughts on it.
You are asking about automatic storage tiering. You can get what you
want in a transpara
El 13/01/11 17:01, David Woodhouse escribió:
On Wed, 2011-01-12 at 09:53 -0800, Marc Perkel wrote:
I just replaced my drives for Dovecot using Maildir format with a pair
of Solid State Drives (SSD) in a raid 0 configuration. It's really
really fast. Kind of expensive but it's like getting 20x th
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 v
The intended way to restore stuff is to either restore the entire dbox to a
temp directory, or at least all the important parts of it (indexes + the files
that contain the wanted mails) and then use something like:
doveadm import sdbox:/tmp/restoredbox "" savedsince 2011-01-01
Thank yo
Hello
Hmm. I guess if you were doing backups 24h/day, then you can't really say how
much faster mdbox performs than maildir (outside backups)?
No, 24 hours is for a FULL backup in the weekend. An incremental
backup is only 2-3 hours in the night every day.
About performance... I ca
Hello
Can anyone explain about mdbox_preallocate_space and ext4?
Regards
Javier
El 05/03/11 11:48, Stéphane Wartel escribió:
Dear all,
Since new release has been installed, auth process crash with io loop :
Same problem here, dovecot 2.0.9 works right with ldap (RHEL 5.6 x64) ,
but dovecot 2.0.10 crashes
/Mar 5 19:21:21 buzon dovecot: auth: Panic: file db-ldap.c: line
http://hg.dovecot.org/dovecot-2.0/rev/b44ec48d9425 probably fixes it?
That patch solves the problem for me, now dovecot ldap auth works. Thank
you Timo.
(I was going to test that broken change when I made it, but then I realized I
didn't have LDAP server installed and I just hate installing
Hello.
We are planning a migration from Sun One Messaging Server to
Dovecot+Postfix+Ldap. We are using Dovecot 1.2.11 with Sun One Directory
Server 5.2 ldap (we will migrate to Directory Server 6.3.1) soon. In our
University we have 65.000 students, 5.500 staff and 6.500 teachers.
El 07/06/10 19:00, Timo Sirainen escribió:
On su, 2010-06-06 at 14:38 +0200, Javier de Miguel Rodríguez wrote:
1) We are unable to make dbox work with quota, but we have no
problem with maildir. Quota is stored in a ldap attibute called "mailQuota"
I don't r
Has anybody tried to use opensso as authentication source for dovecot
? Maybe using PAM+Opensso?
Regards
Javier
Another intesting thing for this thread: if you set a very high
value for mdbox rotate settings, your incremental backups will be awful.
If you have hundreds of messages in a mdbox and you doveadm purge one of
them, the full .m file must be copied in the incremental / diferential
backup.
I use
Great mail, Stan
Another trick: you can save storage (both space & iops) using mdox and
compression. CPU power is far cheaper than iops , the less data you
read/write, the fewer iops.
You can use gzip,bzip2 or even LZMA/xz compression for LDA. If you also
use Single Instace Storage and Alter
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