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Mailbox Store Database

If I set archiving up for each of my users will this reduce the size of my mailbox store database (priv1)? Will I have to defragment the database before archiving will reduce the size of the database?  Thanks.
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mking009
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mking009
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2 Solutions
 
flyguybobCommented:
MKing:

I am going to assume that you are using Exchange 5.5 (this is mainly important because of my last paragraphs regarding being cautious running an offline defrag on Exchange 5.5...fortunately Exchange 2000 and 2003 handle offline defrags a little better).

If you archive information out of the Exchange database (.edb and .stm files) you will still have to perform an offline defrag in order to reclaim the "white space".

Unfortunately, when you archive information from the users mailbox the "white space" still exists and the priv.edb does not actually decrease in size.  What you will see, in your Application log, when you look for events to online defrags is that you may have xxMB of white space.  Again, the priv.edb will remain the same size until the white space is filled or an offline defrag is executed.

The only way to recover this "white space" is with an offline defrag of the .edb.  In the Exchange 5.5 days this could potentially cause loss of attachments for users.  It was known that before running an offline defrag of the Exchange it was well advised to make a backup and verify you could restore it (even if to a test recovery server)

The KB article below should get you well on your way to an offline defrag, if you decide to do this:
How to defragment with the Eseutil utility (Eseutil.exe)
http://support.microsoft.com/kb/192185 
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yomanexCommented:
if you set archiving on outlook it will this reduce the size of my mailbox store database
only after offline defragment
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mking009Author Commented:
I am using Exchange 2000.  I am familiar with ofline defrag. I ran an offline defrag when my mailbox database ran out of space (max out on the 16 GIG limit).  That allowed me to recover enough space to restart the mailbox store.  My intention was then to set archiving on everyones computer since we were not previously archiving anything. I thought that as email was moved off the server and into archive folders that would make my mailbox store smaller in size.  However, now that I have archived about 5 GIGs of email my mailbox store is still the same size (priv1.ebd - 10.5 GIG & Priv1.stm - 5.5 GIG).  Will this change if I do another offline defrag. or does archiving not reduce the database size?  Thanks.
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yomanexCommented:
yes you need to run defrag again after you finsh archiving
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flyguybobCommented:
MKing:

For the reasons explained in my first post, yes, you should perform another offline defrag after you finish archiving your information and after you finish a full backup.

Bob
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flyguybobCommented:
Is there anything we could have done to recieve A grades?

Bob
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