On Sun, Aug 20, 2006 at 06:16:23PM -0500, Mike Gerdts wrote: > On 8/20/06, James Dickens <[EMAIL PROTECTED]> wrote: > >On 8/20/06, trevor pretty <[EMAIL PROTECTED]> wrote: > >> Team > >> > >> During a ZFS presentation I had a question from Vernon which I could not > >> answer and did not find with a quick look through the archives. > >> > >> Q: What's the effect (if any) of only having on Floating Point Processor > >> on Niagara when you turn on ZFS compression? > >> > >not an expert, but most if not all compression is integer based, and > >I don't think floating point is supported inside the kernel anyway so > >it has to be integer based.
That's correct, we don't do any floating-point math in ZFS, either compression or checksumming. So Niagara's floating point performance will have no effect on ZFS performance. > Not too long ago Roch said "compression runs in the context of a > single thread per pool", which makes me worry much more about the > speed of a single core doing all of the compression for a pool. This was not the design, we're working on fixing this bug so that many threads will be used to do the compression. --matt _______________________________________________ zfs-discuss mailing list zfs-discuss@opensolaris.org http://mail.opensolaris.org/mailman/listinfo/zfs-discuss
