> Dom0 > > amber ~ # uname -a > SunOS amber 5.11 snv_113 i86pc i386 i86xpv > > amber ~ # /usr/gnu/bin/dd if=/dev/zero of=/tank/test count=100000 > 51200000 bytes (51 MB) copied, 2.70782 s, 18.9 MB/s > > DomU : > > corwin bruno # uname -a > Linux corwin 2.6.18-xen-r12 #7 SMP Fri May 8 10:41:05 CEST 2009 x86_64 > Intel(R) Core(TM)2 Quad CPU Q6600 @ 2.40GHz GenuineIntel GNU/Linux > > corwin bruno # dd if=/dev/zero of=/home/bruno/test count=100000 > 51200000 bytes (51 MB) copied, 0.504987 s, 101 MB/s > > Now that is a 1 to 5 performance gap !! > Any ideas about how to explain this ?
Are you sure that linux has actually written the data to disk when the dd has returned? In most cases (esp with such a small amount of data) linux has the data in it's buffer cache and *not* on the disk. -- This message posted from opensolaris.org _______________________________________________ opensolaris-discuss mailing list [email protected]
