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Information Store Limitations - 6.Sep.2007 9:56:45 AM

rogue42

Posts: 2
Joined: 6.Sep.2007
Status: offline

I've been delving around trying to find any information on what limitations and/or recommendations there are in regard to Exchange 2000 Enterprise information stores. The best I can find is no more than four storage groups with five information stores are allowed. Aside from this, I'm trying to find any information regarding:

1.) Maximum recommended/allowed information store size
2.) Maximum recommended/allowed individual mailbox size
3.) Maximum recommended/allowed mailboxes (per store, as well as total)

Has anyone seen any numbers attached to these items?

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RE: Information Store Limitations - 6.Sep.2007 12:51:44 PM

a.grogan

Posts: 1887
Joined: 12.Apr.2005
From: London
Status: offline

Hiya Chap, perhaps this will help;

1.) Maximum recommended/allowed information store size

Maximum size of the Information store is 16TB, however you should be looking to keep a single database in a busy enterprise to about 150 - 200 GB with as little whitespace as possible.

You may get further comments on that, as everyones situation tends to be different, as does their maintenance intervals.

2.) Maximum recommended/allowed individual mailbox size

This is down to personal preference, I have seen mailbox Max sizes of 41 MB - and I have also seen MB Sizes of 4GB (which is insane - personal opinion) - I personally recommend a size of around 300 - 400 MB with an archiving solution - but you should note that if you intend to use EXMERGE and you wish to export a mailbox of greater than 2 GB then you are out of luck.

You should also note that a mailboxes with over 8000 items in any one folder can impact the performance of the server.

3.) Maximum recommended/allowed mailboxes (per store, as well as total)

This can depend on your hardware, and disk subsystem - to give you a marker:

4GB RAM, x 2 Processors @ 3.0GHz, SAN @ 2GB connection speed I have seen comfortably run 3500 mailboxes.

I hope this helps,

A

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(in reply to rogue42)

Post #: 2

RE: Information Store Limitations - 6.Sep.2007 1:08:01 PM

rogue42

Posts: 2
Joined: 6.Sep.2007
Status: offline

Perfect. I had the feeling we were pushing our limits a little bit. 350 GB database with about 400 users, at least a third over 1 GB, and some pouring over 7. I'll relay this and any other comments up the chain.

Thanks again!

(in reply to a.grogan)

Post #: 3