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:ADSM-L AT VM.MARIST DOT EDU] On Behalf Of 
Xav Paice
Sent: 26 October 2010 21:04
To: ADSM-L AT VM.MARIST DOT EDU
Subject: Re: [ADSM-L] Change rate performance question

----- "cory heikel" <cheikel AT HMC.PSU DOT EDU> 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.
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19:34:00