DragonFly kernel List (threaded) for 2009-08
DragonFly BSD
DragonFly kernel List (threaded) for 2009-08
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Re: HAMMER problems with ciss


From: Matthew Dillon <dillon@xxxxxxxxxxxxxxxxxxxx>
Date: Sat, 8 Aug 2009 14:11:09 -0700 (PDT)

    It will depend on what kind of test you are running.  Anything
    that calls fsync() is going to be fairly horrible for HAMMER...
    flushing the filesystem is very expensive and going to remain
    that way for a while.

    Normal sequential write I/O without fsync() should be fairly close
    to platter rates, at least that is what I get, e.g. with something
    like dd.

					-Matt
					Matthew Dillon 
					<dillon@backplane.com>



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