"ADSM: Dist Stor Manager" <ADSM-L@VM.MARIST.EDU> wrote on 06/13/2006 09:42:38 PM:
> On Tue, 13 Jun 2006, TSM_User might have said: > > > Many windows 2003 servers now days can scan one to two million files > per hour. We don't use journaling until we get over five million files. > I've seen the deeper the directory structure the longer it takes to scan > Basically if all one million files are at the root of a drive it will > scan much faster then if one million files were in hundres of subdirectories. > > I don't think the time issues relate only to number of files. > The amount of traffic between client and server about just > which files to backup is my concern. That's why I have this > other program. > > Mike I'm not sure there is all that much network traffic during the exchange of metadata, at least I haven't noticed it. If that was the case, then remote site backups over slow connections would take several hours to backup even if only .00001% changed. I've done some slow link remote site backups before and the actual exchange of metadata seemed to be rather small and quite efficient, and I don't recall the times to scan the filesystems taking a whole lot longer than their local LAN counterparts. Then again that was a few years ago and my memory could be failing me. If anyone on the list is doing LANfree backups with any servers that have a somewhat large number of files, it would be interesting to see your LANfree vs LAN bytes sent summary at the end of your backup. That will be a true test of how much data is sent over the network during the process of deciding whether or not to backup a file. ______________________________ John Monahan Consultant Infrastructure Solutions Computech Resources, Inc. Office: 952-833-0930 ext 109 Cell: 952-221-6938 http://www.computechresources.com