topic Re: How to create a 50MB & 100MB files in Operating System - Linux

How to create a 50MB & 100MB files

Rosli Ahmad — Sun, 10 Apr 2005 20:31:28 GMT

Hi,
I'm wondering if there's a quick and dirty way to create a sample 50MB & 100MB files for testing purposes. I'm in the midst of a throughput testing and need to sample files for comparison.

Also, what's the command to use to capture/ measure execution time? Is it 'time' command?

Re: How to create a 50MB & 100MB files

NiCK_76 — Sun, 10 Apr 2005 22:50:24 GMT

hi Rosli Ahmad ,

dd bs=50M if=/dev/zero of=aaa count=1
dd bs=100M if=/dev/zero of=aaa count=1
NiCK

Re: How to create a 50MB & 100MB files

Rosli Ahmad — Sun, 10 Apr 2005 23:32:17 GMT

Thanks NiCK, any idea how to intepret time output?

Re: How to create a 50MB & 100MB files

NiCK_76 — Mon, 11 Apr 2005 00:57:33 GMT

Hi Rosli Ahmad ,

just press "Ctrl+C" to stop it.

NiCK

Re: How to create a 50MB & 100MB files

Huc_1 — Mon, 11 Apr 2005 05:10:02 GMT

I am not sure but maybe this is what you ask for ?

#time -E dd bs=50M if=/dev/zero of=aaa count=1

notice the -E there are many options this one is for Hour, Min, sec more discriptions are to be found in

# man 2 time

Hope this is what you required?

J-P Huc

Re: How to create a 50MB & 100MB files

Huc_1 — Mon, 11 Apr 2005 06:15:24 GMT

Zero points for my previous reply please It is wrong !

this should read

# time Â´ a command Â´

You will find more explainations about the output format in following man page

man 2 times

J-P