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Mike Drew

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We are having an issue when we are cleaning up old messages from former employees etc. Using KC 8.4.1 (3789) 30 users running on a Late 2012 Mac Mini.
When we try to move a lot of messages in Apple Mail the system refuses to move more that about 200 at a time.
Is this a restriction within Kerio or Apple Mail? Using the Kerio Connect web mail you can only select 50 emails at a time so moving thousands is a time consuming exercise.
Or could this be a limitation of our hardware, would a more powerful computer help in this situation. We will be upgrading the hardware anyway shortly so I was also hoping for a recommendation on a suitable system for our needs. 30 users. OS system does not matter Mac Win or Linux.

Many thanks

Mike
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eirikw

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This is a combination of too short timeouts in Apple Mail and slow disk performance on the server. You can actually see the same in the WebMail client as well, it just works a little bit better. We had the same problem ourselves, also on a 2012 Mac mini. We moved /usr/local/kerio to an internal 1TB SSD disk on the same Mac mini, and the server started to work much better.

My recommendation is to upgrade to SSD disks for mail storage. Although a bit on the expensive side, it really accelerates the handling of messages. There's very little CPU involved in mail servers, mostly it is memory and disk. The 2012 Mac mini can be upgraded to a two disk setup. Using two big SSDs and RAID or CoreStorage to combine the storage volume, you may get a huge boost. Don't forget to have a separate backup disk, as well.
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Mike Drew

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Thanks Eirik, we are getting new hardware (current machine end of lease). So if we had a new Mac mini with a SSD system drive and fast thunderbolt array for message storage would we see improvement? We currently have 890GB of Mail data so a single SSD storage would not be enough.
Any other thoughts on hardware?

Mike
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eirikw

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You're welcome! You would definitively see improvement with that setup. With external storage for mail, you can easily go for the smallest SSD option for the server itself, even HD or Fusion Drive. It doesn't matter much when the computer is booted. You might as well max RAM on the server as well, although 8 GB should be enough.

On our setup, I ended up placing the whole /usr/local/kerio folder on the SSD drive, and placing a symlink in /usr/local/. We are running 100 accounts using 814 GB on our 1 TB disk, but an external array might be in the works...

[Updated on: Tue, 03 March 2015 08:22]

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