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 ?)

[Ken Chase]

yeah, i read somewhere that zfs DOES have separate tuning for metadata 
and data cache, but i need to read up on that more.

as for heavy block duplication: daily backups of the whole system = alot of dupe.

/kc


On Thu, Jul 16, 2015 at 05:42:32PM +0000, Andrew Gideon said:
  >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
  >
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Ken Chase - ken at heavycomputing.ca skype:kenchase23 +1 416 897 6284 Toronto Canada
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