Colin Raven wrote: > On Sat, Dec 5, 2009 at 17:43, Seth Heeren <s...@zfs-fuse.net > <mailto:s...@zfs-fuse.net>> wrote: > > 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. > > > Goodness me, what the heck does weather have to do with the > performance of an SSD? >
It's a figure of speech... Nothing. But my network conditions and the speed at which I login, the exact delay detecting the logical volume groups on my 6 sata disks in the same system... these times will vary. Not to mention system updates that trigger actions at boot time etc. I'm on Ubuntu Karmic, btw. and the boot fs is (obviously) not on ZFS (but ext4 minus journalling and with tweaked block sizes/alignment). _______________________________________________ zfs-discuss mailing list zfs-discuss@opensolaris.org http://mail.opensolaris.org/mailman/listinfo/zfs-discuss
