RE: how to sell network nodes

[Marc Roos]

> nd at a maximum rate of 16589.7124 mb/s with blocksize 67108864 (the 
entire file at once).

> Why, I ask you, is dd that much slower? What is it 'actually' doing 
with all the processing power available?

I really do not get what this thread is about. I thought it was spam 
with this subject. First of all you should not use dd for performance 
testing. Use fio with something like this.


[global]
ioengine=libaio
#ioengine=posixaio
invalidate=1
ramp_time=30
iodepth=1
runtime=180
time_based
direct=1
#filename=/dev/sde
filename=/mnt/disk/fio-bench.img

[write-4k-seq]
stonewall
bs=4k
rw=write

[randwrite-4k-seq]
stonewall
bs=4k
rw=randwrite
fsync=1

[randwrite-4k-d32-seq]
stonewall
bs=4k
rw=randwrite
iodepth=32

[read-4k-seq]
stonewall
bs=4k
rw=read

[randread-4k-seq]
stonewall
bs=4k
rw=randread
fsync=1

[randread-4k-d32-seq]
stonewall
bs=4k
rw=randread
iodepth=32

[rw-4k-seq]
stonewall
bs=4k
rw=rw

[randrw-4k-seq]
stonewall
bs=4k
rw=randrw

[randrw-4k-d4-seq]
stonewall
bs=4k
rw=randrw
iodepth=4


[write-4096k-seq]
stonewall
bs=4096k
rw=write

[write-4096k-d16-seq]
stonewall
bs=4M
rw=write
iodepth=16

[randwrite-4096k-seq]
stonewall
bs=4096k
rw=randwrite

[read-4096k-seq]
stonewall
bs=4096k
rw=read

[read-4096k-d16-seq]
stonewall
bs=4M
rw=read
iodepth=16

[randread-4096k-seq]
stonewall
bs=4096k
rw=randread


[rw-4096k-seq]
stonewall
bs=4096k
rw=rw

[randrw-4096k-seq]
stonewall
bs=4096k
rw=randrw