Hello Bob, On Jan 10, 2010, at 4:54 PM, Bob Friesenhahn wrote:
> On Sun, 10 Jan 2010, Phil Harman wrote: >> In performance terms, you'll probably find that block sizes beyond 128K add >> little benefit. So I'd suggest something like: >> >> dd if=/dev/urandom of=largefile.txt bs=128k count=65536 >> >> dd if=largefile.txt of=./test/1.txt bs=128k & >> dd if=largefile.txt of=./test/2.txt bs=128k & > > As an interesting aside, on my Solaris 10U8 system (plus a zfs IDR), dd > (Solaris or GNU) does not produce the expected file size when using > /dev/urandom as input: Do you feel this is related to the filesystem, is there any difference between putting the data in a file on ZFS or just throwing it away? $(dd if=/dev/urandom of=/dev/null bs=1048576k count=16) gives me a quite unresponsive system too. Henrik http://sparcv9.blogspot.com
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