On Wednesday 08 August 2012 18:09:59 George Sinclair wrote:
> Hi,
> 
> Three questions on the 'Backup renamed directories' attribute:
> 
> 1. If you turn on the 'Backup renamed directories' attribute for a 
> client then under what circumstances *might* 'save -i' (backup command 
> attribute) not work as expected?


I wouldn't expect any other drawbacks/differences than slower backups because 
of the
extra lookups. Have you seen differences?

> 2. Why does enabling this attribute cause the save program to perform a 
> lookup in the CFI in order to determine if a directory have been renamed?
> 
> Normally, NW is looking at the ctimes of the files and comparing these 
> against the value stored in the media database for the affected save set 
> for the previous backup. I would think the CFI would only be read when 
> doing recovers, so if a directory is renamed, then its ctime will 
> change, and if NW knows that the ctime has changed then why not just 
> back up everything under there without having to check the client file 
> index?

This is because NTFS (or Microsoft) doesn't consider renaming a directory as 
beeing a change in that directory (sic!) and doesn't modify the ctime of the 
directory.
This is a grey area in POSIX and of course MS had to do it on a different way 
than the rest of the world...

> 3. What happens if you have this attribute turned on, but you're writing 
> your data to a non-indexed pool?

Shouldn't make any difference.

Best
Dag