Veritas-bu

[Veritas-bu] Exchange

2002-04-10 10:30:21
Subject: [Veritas-bu] Exchange
From: ron AT linux DOT ca (Ron Lyman)
Date: Wed, 10 Apr 2002 10:30:21 -0400 (EDT)
On Wed, 10 Apr 2002, Downey, Cristian    APX wrote:

> Unfortunately, the Exchange mailbox level backups run through MAPI.  Which
> basically means that it is opening each message and backing it up.  They
> always run MUCH slower than regular DB backups.  We see about the same
> throughput you do using regular DLT drives.  As far as the amount of data
> that fits on a tape, it may be that since it is backing up each message
> individually, you're loosing the single message store advantage of Exchange.
> Therefore, the same message in 3 peoples mailboxes will be backed up 3
> times.
> 
> Date: Wed, 10 Apr 2002 14:14:48 +0200
> From: "JR Redelinghuys" <JR.Redelinghuys AT mgxgroup DOT com>
> To: <veritas-bu AT mailman.eng.auburn DOT edu>
> Subject: [Veritas-bu] Exchange
> 
> Hi
> The problem is that we are getting 10 m/s throughput on the database =
> backup but only 1 or 2 m/s throughput on the mailbox backups.=20 We also

I have heard that mailbox level backups take a LOT more time and a LOT more 
tape.  This is normal.

FWIW, I asked our Veritas support provider a related question, I'll tack that 
email to the end of this message as a 'supporting document' of sorts.

Ron Lyman
Network Support
Moen Incorporated
(905) 829-3400 x 253


> -----Original Message-----
> From: ****, Fred
> Sent: Thursday, March 07, 2002 14:43
> To: Lyman, Ron
> Subject: RE: exchange mailbox configuration for NBU 3.4
> 
> 
>  I would say backing up the whole store is going to be three times faster
> depending on attachments in the individuals mailboxes which slow things down.
> 
> Fred
> 
> -----Original Message-----
> From: Lyman, Ron
> To: '****, Fred'
> Sent: 3/7/02 2:27 PM
> Subject: RE: exchange mailbox configuration for NBU 3.4
> 
> Thanks Fred, this looks very straight forward.
> 
> Do you have any idea how much longer it would take to backup individual
> mailboxes vs. the stores as a whole?  We have 105 mailboxes, and just under 2
> G in the stores.
> 
> Thanks,
> Ron.



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