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Phideaux00

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Care to share your Kerio stats/experiences?

I'm interested in other user experiences with mail store sizes and related stats. Here's mine for a company I support:

Server:

Kerio 6.4.1 running on RHEL 4 (Soon to be Fedora 7 or 8 to support 3Ware controller below).
3GB P4, 2GB RAM, two SATA 300 HDs (one main, one backup. Soon to be a RAID 6 3Ware controller with 5 drives.) Obviously, I'm in the 'build your own server' camp now, but I might switch someday.

Internal Network:

1Gb/s Cisco switched network to the desktops, servers. Most desktops still run 100Mb/s cards, though.

Internet Connection:
768k fractional T-1

Background:

We run Webmail only, no Outlook, POP3, etc.
Installed 5 months ago, converted from Exchange/Windows

Stats:
29 users
2 Smart Phone users (Verizon wireless, with windows mobile)
35GB mail store (70,413 emails) and growing fast!

Performance:
Webmail performance is perfect for us. It's about a second or two to log in and display first the page (100 emails per page, no preview pane) from the internal network. We use the Firefox web browser with the 'dragdropupload' add-on. The same login from remote locations via Internet is about 4 seconds (Of course, this depends on the users connection too, etc...) Both internal and external connections use SSL encryption.

Full backups take a little less than two hours. Differential backups take about 2 minutes.


PS. For Linux users: I counted the emails by issuing the following command from the /home/kerio/mailserver/store directory.

find mail -name "*.eml" -print | wc -l

Not sure this is the best way, but at least it's something.

  •  
Dave Hahn

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Server:
Software: Kerio 6.4.2 on OS X Server 10.4.11
Processor(s): 2 x 2 GHz Dual-Core Intel Xeon
Memory: 4GB 667 MHz DDR2 FB-DIMM RAM
Storage: RAID 5, Kerio/OS/MailStore on single volume
Controller: Internal Apple Hardware RAID Controller
Disks: 3 x 73GB 15K RPM SAS


Internal Clients:
Mac Users, OS X "Tiger" using Apple's Mail.app (Connecting over Exchange) iSync connector for Address Book/iCal syncing.

Internet Connection:
3Mb/s bonded T1 pair


Stats:
30 users
29GB / 138,224 emails

Smartphones:
1 Sprint PPC-6700 (WM6) ActiveSync
1 Sprint Treo 700w (WM5) ActiveSync
1 Sprint Treo 755p (Palm) VersaMail ActiveSync
5 AT&T iPhones (Apple OS X) IMAP over SSL (soon to be thru VPN)

iPhone setup:
iPhones sync mail every 15 minutes using IMAP. Contacts and Calendar syncs thru USB cable at user's desk using iTunes, syncing with Address Book and iCal on their mac. Kerio iSync connector then syncs Address Book and iCal to Kerio server. (ActiveSync is better, but iPhones sure are more fun Smile )

Performance:
Everything is very snappy and good. Full backups take ~1.5 hours.

Contingency Plan:
Kerio makes 1 Full backup per week, with a daily differential to a Firewire 800 drive. Our backup server backs up the firewire drive daily to LTO3 Tape using Retrospect and an Exabyte Magnum 224 Tape Library. We have two tape sets, and alternate them onsite/offsite each week. We recycle them and start new sets every six months - this is for everything, not just the email.

Feature Requests:
-Ability to search full message content (starting with body text, but also within common attachment files like docs and pdfs)
-Fancy webmail interface for iPhone, something like iZimbra...

[Updated on: Tue, 08 January 2008 18:35]

  •  
winkelman

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Server:
Kerio 6.4.2 running on Windows Server 2003 R2.
IBM xSeries 336, 3.2Ghz Xeon, 1GB RAM, two 136Gb 15000rpm SCSI-U320 drives in RAID-1

Internal Network:
1Gbps between servers and switches, 100Mbps to desktops

Internet Connection:
50Mbps up&down

Background:
Installed 3 years ago on equal hardware, but with 7,200rpm PATA disk. The move to 15,000rpm SCSI disks 2 years ago quadrupled (!) performance and solved some strange stability problems.

Stats:
Webmail only

108 users

8 smartphones with 'over the air' directpush (Windows Mobile 5 and 6)

28.2GB mail store (488,593 files, 22,268 folders and 453,426 emails [*.eml] Shocked !) and growing. (But I have my users on a fixed quota and I'm very reluctant to enlarge it [even though they beg and scream], to make sure they actually do clean out their mail box once in a while. Of course, when they really need a larger mailbox, they get it. But that doesn't happen often Twisted Evil )

Performance:
Webmail performance is perfect. People can just click through the interface like it was a locally installed mail application. We have a SSL-certificate so connections are all secured (internal and external).

Full backups take a little over 2.5 hours (a bit slow, but mainly because it is written to the same disk as the store). I never use differential backups: a full backup every day. Our backup server picks up the backup after KMS finishes it.
  •  
elias

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Server:
KMS 6.4.1p1 on Windows Server 2003
HP Proliant DL360 G5, Dual 3.2 GHz Xeon procs, 2 GB RAM, two 36GB SAS drives RAID-1 for the OS, four 72GB 15k SAS drives RAID 10 (w/512 MB R/W cache) for the KMS store.

Network:
Gigabit ethernet for servers, 100Mbps to desktops

Internet Connection:
3Mbps via dual bonded T1s

Background & Performance:
Installed KMS about 2 years ago, made the common mistake of using ATA disks and KOC performance was unbearable. Upgraded to SAS disks with a caching RAID controller and KOC performance is perfectly acceptable. I also defrag the store regularly.

I'm not using KMS for AV or spam filtering, instead I have a Barracuda Spam Firewall 400 sitting in front of my KMS box.

Stats:
47 Users, nearly all KOC (no quotas)
4 smartphones using directpush

34 GB mail store (1,011,008 .eml files, 5,938 directories)

Backups:
Weekly full backups and daily diffs. Full backups take ~2 hours, diffs take ~10 minutes.
  •  
mdawson

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Server:
KMS 6.4.1p1 on SUSE Linux 10.1
Dell Poweredge 2900, 3.0 GHz Xeon proc, 2 GB RAM, 3 36GB 15K RPM SAS drives RAID-5 for the OS.

Network:
100Mbps

Internet Connection:
T-1 Internet
T-1 private MPLS

Background & Performance:
Installed KMS about 6 months ago (2 Exchange 5.5 servers in different locations to 1 Kerio server). Slow, but not unbearable performance on KOC for remote users but fine for use at server location.

Stats:
166 Users - 90 POP3, 25 Local KOC users, 20 Remote KOC users, 41 webmail users
15 smartphones using directpush

28 GB mail store (210,076 files)

Backups:
Daily full backups take 1.5 hrs. Back up to a USB drive taken home nightly (5 drive rotation).
  •  
matti763

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Server:
KMS 6.4.2 on RHEL 4.0
IBM HS20, 2.8 GHz Xeon x2 and 2,5 GB RAM
SCSI320 RAID1

Network:
1Gbps

Internet Connection:
100/100

Background & Performance:
4 years old
Good performance for user, bad for backups

Stats:
Users: ~1000
Emails: 820884
Used storage: 106Gb
  •  
msteward

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Server:
KMS 6.4.2 on Windows 2003R2
Dell PE2850, 3.6 GHz Xeon x2 and 2 GB RAM
iSCSI SAN

Network:
1Gbps

Internet Connection:
100Mb/s

Background & Performance:
2 years old
Excellent user performance (no KOC). Backup performance subpar.
I don't use SpamAssassin (I use ModusGate as a gateway filter).

Stats:
Users: ~3200
Emails: ~1.2 Million
Used storage: 216Gb
  •  
88fingerslukee

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Server:
KMS 6.4.1 on CentOS 5
DIY - Sempron 3800+, 4GB RAM, 2 SCSI-160 36GB 15K disks
IDE

Network:
1Gbps server and workstations

Internet Connection:
2Mbps Fixed Wireless

Background & Performance:
9 months old, converted from plain ol' POP3.
Excellent user performance on Network with KOC and webmail. Backup performance is not great but considering that it is backing up to an IDE drive (jenky, I know) ...to be expected.
Remote KOC is not particularly usable, depending on the remote connection. Hoping KOFF will fix this.
Remote Webmail is fantastic.
Smartphone performance is also great.

Stats:
Users: 7
Smartphones: 2 Motorola Q's running WM5
Emails: ~40000
Used storage: 8.1GB
  •  
Matt S

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Server:
Software: Kerio 6.4.2 on Windows 2000
Processor: 2.3gHz Core2duo
Memory: 2GB 667 MHz DDR2 RAM
Storage: RAID 5, OS and Kerio on first partition, Mailstore on second
Controller: Megaraid SATA 150
Disks: 3 x 73GB 10K RPM


Internal clients: Webmail

Internet Connection:
ADSL2+ line - 9mbps in 1.5mbps out


Stats:
33 users
4.3GB

Smartphones:
1 HTC Hermes (WM6) ActiveSync

Performance:
We're brand new to Kerio and I'm happy with the performance. Sorting on large folders can take a little longer than I'd like, but I haven't taken a good hard look at the disc system for a while. Anti-spam is working particularly well, with very little junk getting through.

Feature Requests:
-Ability to search contacts by category
-Fancy webmail interface for iPhone, something like iZimbra... (I'm seconding this one... Nice)
-subscribed folders in webmail is messy, really messy in the KOC. Lovely in the Beta KOFF but that presents too many other problems. All the client options really should be equal where possible.
  •  
tek_san

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see my signature for System specs.

Internet Connection is 10mbit
Inhouse Network is 1 Gbit.

The System is fast an reliable.
Spam filtering is done with NoSpamProxy from http://www.netatwork.de.
It is much more efficient than Spamassasin and not so expnsive.

For GDPDU Purpose we use a EMA Emailarchiver Solution from http://www.artec-it.de/Datensicherheit/EMA/Default.aspx

This solution uses the built in backup function and is easily setup and maintained.

regards

Oliver

KC 7.3.1, Win2003 in vsphere 4.1, store drive attached via iSCSI, OS drive attached via NFS.
220+ IMAP Accounts: 210 OSX Mail /Entourage Clients, 10 Outlook 2003 KOC Clients - iPhones, Nokia E66, HTC 4350
Archive:EMA Appliance, SpamFilter: Nospamproxy
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