Server requirements for 2000-6000 accounts

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elyse
Posts: 4
Joined: Fri Sep 12, 2014 10:14 pm

Server requirements for 2000-6000 accounts

Postby elyse » Mon Aug 21, 2006 9:10 pm

I want to migrate over to Zimbra and I am testing it out right now on a small machine to see how it all works. But I need to face the hardware issue.

I have about 1800 accounts and I expect that at some point the number of accounts could get up to 5000-6000. (Note: Approx 1/3 - 1/2 of these would just be POP3 accts.) I have searched the forums here and found some discussion of this but the people who posted their server specs only mentioned 6-20-50 users.
Anybody know what the server requirements would be to handle the load of 2000-6000 accounts?
Thanks in advance!


andreychek
Advanced member
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Joined: Fri Sep 12, 2014 9:58 pm

Server requirements for 2000-6000 accounts

Postby andreychek » Mon Aug 21, 2006 10:19 pm

[quote user="elyse"]Anybody know what the server requirements would be to handle the load of 2000-6000 accounts?[/QUOTE]
Well, while I don't think I'm qualified to answer that question (other than to say you'll probably want a bunch of RAM ;-), those who are qualified are probably going to need to know:
* Mail volume -- it's one thing to know how many users, but it's another to know how much mail they're pulling in
* How often are they checking mail... every 5 minutes? 15? When there's 6000 users, that sort of thing makes a difference :-)
* SSL connections, plain text, or either (SSL connections have a wonderful security benefit, but take more resources)?
I'll offer that you may want to consider a distributed setup, getting that working from the beginning may help things down the road.
With multiple servers, and perhaps a single network storage unit, you could have, say, one server per 2000 users (I'm making the numbers up, you'll need to figure out what ratio is best for you still :-), meaning you'd have 3 live servers when you hit 6000 users. But, you could also keep a fourth standby server to take over if one somehow blew up.
Using network storage, the above setup wouldn't be very complex at all.
Have a good one,

-Eric
elyse
Posts: 4
Joined: Fri Sep 12, 2014 10:14 pm

Server requirements for 2000-6000 accounts

Postby elyse » Mon Aug 21, 2006 10:37 pm

Dear Eric, Thanks a lot for the tip. I've rephrased my question here for anyone who has the experience.
I have about 1800 accounts and I expect that at some point the number of accounts could get up to 5000-6000. (Note: Approx 1/3 - 1/2 of these would just be POP3 accts.) I have searched the forums here and found some discussion of this but the people who posted their server specs only mentioned 6-20-50 users.
"* Mail volume -- it's one thing to know how many users, but it's another to know how much mail they're pulling in"
-- Each account will vary a lot but they probably average about 30-50 email per day. (I have some people that get 800 in a day during crazy times but the above is probably a pretty accurate average.)
"* How often are they checking mail... every 5 minutes? 15? When there's 6000 users, that sort of thing makes a difference :-)"
Most will check their mail every few hours actually. But I am sure some will set it to check every 10-20 mins automatically. (These will most likely be the 1/3-1/2 of the accounts which are using a POP3 client.)


"* SSL connections, plain text, or either (SSL connections have a wonderful security benefit, but take more resources)?"
The web connections will most likely all be SSL.
Further, right now we do have a distributed arrangement. However, I was hoping to only need to get two machines -- for load balancing and redundancy. I will have all of my spam filtering done on another server which I already have. So the functions of the Zimbra server(s) will be mainly the web, IMAP and POP mail services (along with the SMTP obviously). I do not expect a lot of calendar action either.
With this data, does anybody know what the server requirements would be to handle the load of 2000-6000 accounts?
Again, thanks to anyone who can provide the data.
best, elyse

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