If you're using Windows or Linux, have you considered what the TSM FastBack product offers in this area? Its block-level incremental-forever volume snapshot backups and instant mount/instant restores may be of appeal to users suffering from traditional backup issues associated with file/print/millions of objects per filesystem. A downside is that it would require another piece of infrastructure (i.e., a TSM FastBack Server) but there are increasingly strong integration points with the core TSM Server product in recent releases. Take a look here for a datasheet/overview if you're interested: ftp://public.dhe.ibm.com/common/ssi/ecm/en/tid14022usen/TID14022USEN_HR.PDF ___________ David Mc London, UK
-----Original Message----- From: ADSM: Dist Stor Manager [mailto:[email protected]] On Behalf Of Xav Paice Sent: 26 October 2010 21:04 To: [email protected] Subject: Re: [ADSM-L] Change rate performance question ----- "cory heikel" <[email protected]> wrote: > I have many clients with an average daily change rate of over 50%. > Most of these clients take several hours to back up and show a high > percentage of wait time in the summary table. My question is this: > Would it make sense for these clients to be backed up full each day > instead of incremental? > Without more detail, I'd suggest trying an online image backup of some selected clients and see what difference it makes. You might find, however, that there are pros and cons for image vs incremental - in terms of storage used, performance of other operations during backup, and ability to restore individual files. You could also consider using -incrbydate - just so long as you regularly do a 'normal' incremental since -incrbydate misses deleted files and isn't the most secure option. Where is the delay though - have you looked at the instrumentation to determine if it really is filesystem scanning that is the slow bit? No virus found in this incoming message. Checked by AVG - www.avg.com Version: 9.0.862 / Virus Database: 271.1.1/3203 - Release Date: 10/24/10 19:34:00
