DragonFly users List (threaded) for 2008-07
[
Date Prev][
Date Next]
[
Thread Prev][
Thread Next]
[
Date Index][
Thread Index]
Re: Hammer performance
:
:Abother strange thing occurs if I "dd" directly to the device:
:
: dd if=/dev/zero of=/dev/ad4s1d count=20000
: 20000+0 records in
: 20000+0 records out
: 10240000 bytes transferred in 7.361097 secs (1391097 bytes/sec)
:
:Here I only get around 1.4 MB/sec. Shouldn't that me a much higer value?
:
:Regards,
:
: Michael
If you do not specify a block size parameter to dd it will be doing
512 byte writes. A typical block size is 32k, e.g.:
dd if=/dev/zero of=/blah bs=32k count=10240
-Matt
Matthew Dillon
<dillon@backplane.com>
[
Date Prev][
Date Next]
[
Thread Prev][
Thread Next]
[
Date Index][
Thread Index]