Am 21.06.16 um 16:09 schrieb Marcus Rueckert:

On 2016-06-21 07:17, Götz Reinicke - IT Koordinator wrote:

...

Hi,

we start to run out of diskspace soon as our users start to keep mails for longer time periods. That's fine, but space consuming.

The maildirs are about 1 TB in total, and not long ago we enabled zlib which is very nice.

Now I have some thoughts about the next steps:

a) Migrating the whole system to a new server with more storage?

b) Install a virtual server for the mailsystem and an extra storage system may be NFS?

c) Stay with the current server and move all mails to a bigger NFS storage.

The last option c) would be the most easy one for me as I currently have NFS space.

Any thoughts? Hints regarding the NFS storage? Pros Cons?

I have seen the dovecot wiki on NFS already and for now we will stay with one single dovecot server.

FC or iSCSI as storage.

and always have a lvm layer between your HW and the FS. that way you can easily attach more disk to the stripe set and grow your storage that way.

darix

Hi Darix,

thanks for that feedback. Currently we are moving away in lot of areas from iscsi as it is to mutch maintenance for us. But may be we go with a small one for the mailsystem ...

Regards . Götz

Hi Daniel,

thanks for your feedback. Adding more disks is adding a new shelf as all slots are in use and this is a sun/intel server with all slots already in use.

Ceph is our goal for this year for some filestorages but for mail I'll need space now xD ... O.K. I'll check some storage with a bigger disk; may be some small "iscsi-box".

Regards . Götz

Am 21.06.16 um 21:53 schrieb Daniel van Ham Colchete:

Gotz,

at that level of usage I would just add more drives. Working with NFS/clustering is not worth it when you are at that level. In the following months I'll send a e-mail to the list here talking about how I'm using Ceph FS successfully with Dovecot, but it's a lot of trouble. At the 1TB/2TB/4TB level, just go out and buy a bigger disk.

As a side note, with too may emails it is always a problem to have too many small files. I would recommend taking a look at mdbox.

Best, Daniel Colchete

On Tue, Jun 21, 2016 at 4:17 AM, Götz Reinicke - IT Koordinator < goetz.reinicke@filmakademie.de> wrote:

...

Hi,

we start to run out of diskspace soon as our users start to keep mails for longer time periods. That's fine, but space consuming.

The maildirs are about 1 TB in total, and not long ago we enabled zlib which is very nice.

Now I have some thoughts about the next steps:

a) Migrating the whole system to a new server with more storage?

b) Install a virtual server for the mailsystem and an extra storage system may be NFS?

c) Stay with the current server and move all mails to a bigger NFS storage.

The last option c) would be the most easy one for me as I currently have NFS space.

Any thoughts? Hints regarding the NFS storage? Pros Cons?

I have seen the dovecot wiki on NFS already and for now we will stay with one single dovecot server.

Thanks and regards . Götz