newfs_hammer doesn't set dedup time

Matthew Dillon dillon at apollo.backplane.com
Tue Jun 14 23:54:56 PDT 2011


:
:I made a new Hammer filesystem on the laptop disk and looked at the output of 
:hammer cleanup, which shows no dedup. I ran hammer config on it, and there is 
:a dedup line, but it's commented out. The PFSs have no config. How come?
:
:Pierre
:-- 

    dedup isn't turned on my default.  dedup is being used regularly now
    but deduplication in general can lead to I/O fragmentation so it isn't
    the default.  Not everyone needs dedup.

    hammer cleanup should have installed a default config for each PFS.

					-Matt
					Matthew Dillon 
					<dillon at backplane.com>





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