Re: Offline Defrag and Single Instance Storage

Lanwench,

With regards to the .pst files, not my call, it was a management decision.
They want everyone below 250MB mailboxes and executives get 500MB. I went
through all the con's like does not support .pst's over 2GB, easily
corrupted, issues with .pst's on mapped drives when using folder redirection
but this is what they want. I just work here. If Exchange will use the
whitespace, then why are my backups still showing 64GB when I know we cut out
over 10GB of stuff already.

And with regards to SIS, the company only has 1 Information Store. So does
SIS work with just the mail message or every attachment as well? Guy I
worked with said that he sent a message to 10 users with a 10MB attachment
and that each users mailbox sizes went up by 1 message and 10MB. I did not
run this test, I am just going by what he is telling me.

"Lanwench [MVP - Exchange]" wrote:

aja44 <aja44@xxxxxxxxxxxxxxxxxxxxxxxxx> wrote:
Hi all,

Two questions I am hoping someone could answer for me. First, I
currently have a 64GB Exchange IS. I have worked with a bunch of
users teaching them how to archive email in local .pst folders

Ouch - that's not really a very good idea if this data is still
important/meant to be supported. See
http://www.exchangefaq.org/faq/Exchange-5.5/Why-PST-=-BAD-/q/Why-PST-=-BAD/qid/1209.

and
getting rid of sent and deleted items. But even after last nights
backup my Exchange is showing 64GB. Will Exchange take this space
back after regular maint or will I need to perform an offline defrag?

Exchange will reuse the whitespace happily - you don't need to do an offline
defrag for that. Eseutil is not meant to be run on a regular basis for admin
purposes - you'd run it only if necessary.

Second, does Exchange 2003 Standard use single instance attachment
storage by default?

Yes.

A co-working is telling me that when my
publishers send 20 and 30MB attachments to 30 people in the group to
approve that every users mailbox is taking the hit. 2 or 3 of these
twice a week could build up fast. I thought that if an attachment was
sent to multiple users within our organization that only a single
attachment and copy of that email was stored in the IS. How exactly
does it work.

It's per store - so if the users are in the same mailbox store, you get SIS.
If they're in different ones, it's stored twice.

Thanks,




.

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