Exchange provides an API to the backup vendors. This API only does FULL, Incremental, and Differential. It has nothing to do with TSM that it backs the whole thing up everytime. Exchange is just a piece of crap on supporting backup and recovery. You have to think of it as a database and not a file system. Databases just typically backup the whole thing and then do incremental logs.
Welcome to Exchange. You are lucky, many exchange users have to keep their backups for 1 year or forever. Paul D. Seay, Jr. Technical Specialist Naptheon, INC 757-688-8180 -----Original Message----- From: DEAN LUNDGREN [mailto:[EMAIL PROTECTED]] Sent: Friday, May 24, 2002 3:42 PM To: [EMAIL PROTECTED] Subject: TDP for Exchange and TSM sizing We are planning to convert out mail from Groupwise to Exchange 2000 and are trying to estimate the load to TSM. We have 2000 users on Groupwise and a database of about 70 GB. We are told to expect the Exchange to be three time larger or about 200GB. >From what I've read about TDP for Exchange we can choose to do fulls, then either perform differentials or incremental on the log until the next full. How big is the log compared to the database? Some input we have received is to expect the whole database to be backed up, which makes no sense to me. Otherwise the TDP Exchange agent is worthless. We have a 60 day retention policy for our mail and the implications to our tape usage would be too much if we have to backup the whole thing. Can anyone share the size of the Exchange database and how much log space changes. Please let me know whether you've chosen to use differential or incremental and how often you do fulls. Thanks, Dean Lundgren Sr. System Engineer (740)322-5479
