Hi,
Just compared writing a 1 GB large file with Hammer and got:
dragnas# dd if=/dev/zero of=test count=200
200+0 records in
200+0 records out
102400 bytes transferred in 26.880290 secs (38094827 bytes/sec)
When I do the same (on the same hard disk) with UFS, I get
Michael Neumann wrote:
Hi,
Just compared writing a 1 GB large file with Hammer and got:
dragnas# dd if=/dev/zero of=test count=200
200+0 records in
200+0 records out
102400 bytes transferred in 26.880290 secs (38094827 bytes/sec)
When I do the same (on the same hard
On Jul 7, 2008, at 11:20 AM, Michael Neumann wrote:
Hi,
Just compared writing a 1 GB large file with Hammer and got:
dragnas# dd if=/dev/zero of=test count=200
200+0 records in
200+0 records out
102400 bytes transferred in 26.880290 secs (38094827 bytes/sec)
When I
:
:Abother strange thing occurs if I dd directly to the device:
:
: dd if=/dev/zero of=/dev/ad4s1d count=2
: 2+0 records in
: 2+0 records out
: 1024 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
Jasse Jansson wrote:
Doesn't this use of the dd command create a sparse file ???
This is something I wanted to ask for quite some time: does hammer
support sparse files?
if I create an empty file, seek to 1M, and write one byte of data,
will it waste 1M worth of real disk space or not?
How
Matthew Dillon wrote:
:
:Abother strange thing occurs if I dd directly to the device:
:
: dd if=/dev/zero of=/dev/ad4s1d count=2
: 2+0 records in
: 2+0 records out
: 1024 bytes transferred in 7.361097 secs (1391097 bytes/sec)
:
:Here I only get around 1.4 MB/sec.
:Jasse Jansson wrote:
:
: Doesn't this use of the dd command create a sparse file ???
:
:This is something I wanted to ask for quite some time: does hammer
:support sparse files?
Yes.
:if I create an empty file, seek to 1M, and write one byte of data,
:will it waste 1M worth of real disk
