From: ADSM: Dist Stor Manager [mailto:[EMAIL PROTECTED]]On Behalf Of Burton, Robert > I am running TSM server 5.1.0.0, TSM BA Client 5.1.0.1, TDP for Exchange > 2.2.0.0 and Exchange 2000. I noticed that when I backup the exchange > database using TDP or BA client I only get approximately 8mb/sec > aggregate. > So I created a file of the same size, 1.4gb, and I got 25mb/sec > aggregate. > > Has anyone encountered a performance difference such this when backing up > Exchange files?
Think about it. When you're backing up a flat file that's 1.4GB in size, the B/A client opens one file one time, and streams the backup until the file close. Minimum CPU, minimum back-and-forth traffic, one file--all pretty optimal conditions for copying a file from point A to point B. Contrast this with the TDP for Exchange (indeed, *any* TDP agent). It has to handle a hot backup of an open database file, handle the transactions that are happening during the backup, and reconcile the changes in the database files that happen between the beginning and the end of the backup--all while having to use Microsoft Exchange APIs to do it all. I think 8MB/sec (or was it 8Mb/sec?) is pretty darned good. -- Mark Stapleton ([EMAIL PROTECTED]) Certified TSM consultant Certified AIX system engineer MSCE
