Bob Friesenhahn wrote: > On Sat, 5 Dec 2009, Seth Heeren wrote: >>> >>> in the same way, I guess, when running an OS on a SSD boot disk, >>> should we still need the same memory swapping mechanisms as we do >>> today, considering that in that case, the swap device is (nearly) as >>> fast as memory itself. >> Is it? I think that when you look up the numbers (for server-grade >> hardware) you could find an order of magnitude difference. Now there are > > The difference is pretty huge. Consider 6GB+/second vs 140MB/second. Not to detract from the point (my own point in fact) but my 2xSSD in stripes deliver a peak read throughput of 350Mb/s each time I boot :) My boot time lands at 11-13 seconds depending on wheather conditions. > > The interesting thing for the future will be non-volatile main memory, > with the primary concern being how to firewall damage due to a bug. > You would be able to turn your computer off and back on and be working > again almost instantaneously. > > Bob > -- > Bob Friesenhahn > bfrie...@simple.dallas.tx.us, > http://www.simplesystems.org/users/bfriesen/ > GraphicsMagick Maintainer, http://www.GraphicsMagick.org/ > _______________________________________________ > zfs-discuss mailing list > zfs-discuss@opensolaris.org > http://mail.opensolaris.org/mailman/listinfo/zfs-discuss
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