Fwd: rsync --link-dest and --files-from lead by a "change list" from some file system audit tool (Was: Re: cut-off time for rsync ?)

[Andrew Gideon]

On Mon, 13 Jul 2015 17:38:35 -0400, Selva Nair wrote:

> As with any dedup solution, performance does take a hit and its often
> not worth it unless you have a lot of duplication in the data.

This is so only in some volumes in our case, but it appears that zfs 
permits this to be enabled/disabled on a per-volume basis.  That would 
work for us.

Is there a way to save cycles by offering zfs a hint as to where a 
previous copy of a file's blocks may be found?

	- Andrew