I mentioned this before, but I am pretty sure there is a limit on the each
folder of around 16k messages and 2gb (or 1.8)? Pretty sure about the
messages, and fairly sure about the folder size.

Cheers
Greg


-----Original Message-----
From: Andy Grafton [mailto:[EMAIL PROTECTED]] 
Sent: 09 July 2002 14:25
To: Exchange Discussions
Subject: RE: One Folder (was Unlimited Quotas)

James I guess it depends on your situation as well as best practices.

I've noticed no particular performance degredation with people having 10000+
messages in their inbox, or another folder [a l� my Exchange List Archive
folder...] when they are running on a fast (LAN/10Mbit+) link.  

Users connecting via slow links (<=128Kbit) wait for large folders to appear
in Outlook, and it can be unfeasible for them to stack too many messages
into one folder.  Obviously, attachments are a problem in this situation.

Same rule but with lower numbers goes for items in the normal file system
when viewed over slow links.

Presumably if I got enough users on the end of a 10 or 100Mbit link to the
server the performance would degrade if they all have mailboxes with large
numbers of items or regularly move big attachments to and from the server.

I keep attachments out of individuals mailboxes if possible because with our
policies they a) they are not available to others and b) we would hit the
16Gb limit on the mail store in Ex2K std. version PDQ.

One reason for us setting a low(ish) limit on mailbox sizes to to encourage
people to shift mails into public places, or act upon them and file them for
reference.

Some of our other sites use the public folder store as a file system with no
significant performance degradation outside the increased traffic to and
from the server, and the obvious requirement for an Enterprise edition of
Exchange and increased disk space.  Our servers are pretty capable for the
users we have - if you were running a PII 233 with 256Mb of RAM it would
obviously croak under any kind of load and you'd have to set some more
facist policies.

An OWA front end server seems to read the messages on a per-page basis from
the back end server which that user is hosted on.  Thus if your front server
is separated from the back end by a slow link, the performance hit with
folders which have large numbers of messages does not appear as great to be
as great as when using the full Outlook client over a slow link.

All the best,

Andy

Creuna Danmark A/S
Snaregade 10
1205 K�benhavn K
Denmark

Tel : +45 22 68 58 23
Fax : +45 70 20 72 42




> -----Original Message-----
> From: James Liddil [mailto:[EMAIL PROTECTED]] 
> Sent: 9. juli 2002 14:10
> To: Exchange Discussions
> Subject: One Folder (was Unlimited Quotas)
> 
> 
> OK now that that has been beaten to death, I now want to try 
> and understand the aspects that effect performance (or 
> perceived performance) for users.  So the policy will be set 
> at a certain large number for storage. Now will exchange run 
> better if users use folders or does it not matter and I 
> should just let them use the inbox for everything?  And along 
> those same lines is keeping all their attachments in exchange 
> a bad thing from a performance standpoint. Again I only want 
> to consider this from the view point of performance and what 
> is "best" to keep exchange running well.  If using only an 
> inbox has a negative impact then and only then is it 
> justified to spend money for training on the use of folders. 
> Never mind making folks more productive (the one box vs. a 
> well organized file cabinet).  
> 
> Jim Liddil
> 
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