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jrkallas

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We plan to have 100 users on our mail server, and approximately 80 of those users will be utilizing the Kerio Outlook Connector, therefore they will have several open connections back to the server. Our server configuration is as follows:

Xserve G5 2GHz CPU (single CPU)
2 GB RAM
80GB Storage

My question is, will the server handle the load of that many users without any issues? Disk space is not of concern because all users will have a fairly strict mail quota set, we just want to make sure that 80 people hitting the server with multiple connections through the KOC will not take the server down.

Any info would be greatly appreciated.
Thanks,
Justin
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Kerio_ktrumbull

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The Kerio MailServer is more disk intensive than it is CPU and Memory intensive. Please make sure that your hard disk subsystem is the best (fastest) you can afford.

Kevin Trumbull
Kerio Technical Support Team Leader
http://support.kerio.com
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shaggie16

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Would it not also be true to say, that especially when using the KOC it is network bandwidth intensive too. IMAP is less so, because the mail client caches locally. The G5 you mention should have Gigabit ethernet, so make sure it is connceted to a gigabit switch.
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sedell

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Unfortunately, Gigabit ethernet will only work if the building is wired for it. Most buildings have Cat5 or lower unless they were intending to run Gigabit when the building was wired.

As for concurrent users, we have about 85 users using KOC exclusively. There is some latency because the mail is not stored or cached locally. The drive activity is more of an issue than anything else, including network latency. Especially if the user has a large amount of mail in any one particular folder. I would agree that the fastest drives you could get would make a big difference.

Scott
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shaggie16

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I agree re: disk speed definitely, all I am saying is IF you have a switch with gigabit ports, then make sure the X-serve is connected to one of those. Even if the rest of the bulding is only 100Mbps, there will still be an advantage having the server on a gigabit connection.
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winkelman

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Most definitely disk speed as most important component. Moving from 72000rpm IDE drives to 15000rmp SCSI drives improved performance very significantly and also changed KMS from a fairly stable system to a 100% stable system.

So I would say: 15k RPM drives are a ‘necessity’.
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