[Disksim-users] Ask help on cmd line parameter overrides in disksim 3.0 ?

[Xiaoyu Yao]

Hi, John

Maybe we can do  a slight modification of the syntax by assigning each
parameter in the list an explicit name. Therefore, if we want to change the
mean of General inter-arrival times, we can use "General inter-arrival
times: mean" to override it.

For example, we change the syntax of

 General inter-arrival times  = [ exponential, 0.0, 50.0  ],

to

General inter-arrival times = 
{
	type = "exponential",
	base = 0.0,
	mean = 50.0
}

Xiaoyu

-----Original Message-----
From: jsbucy at gmail.com [mailto:jsbucy at gmail.com] On Behalf Of John Bucy
Sent: Wednesday, February 22, 2006 3:30 PM
To: Xiaoyu Yao
Cc: disksim-users at ece.cmu.edu
Subject: Re: [Disksim-users] Ask help on cmd line parameter overrides in
disksim 3.0 ?

On 2/22/06, Xiaoyu Yao <xyao at cse.unl.edu> wrote:
> Hi, all
>
> Any one has experience with disksim 3.0 command line parameter 
> overrides? I try to override the disksim synthetic generator 
> parameters through command line override interface to do a sensitivity
study on RAID performance.
>
> To be specifically, I want to vary the mean value of "General 
> inter-arrival times" from 10ms to 100ms.

This is a known shortcoming of the syntax of the overrides;  you can't
"reach into" a list using that mechanism currently.  I know this is a pain
point for many users so we'll see about getting it fixed before we release a
new version in the coming weeks/months.

In the meantime, I'm afraid you'll have to write some perl or something to
edit the parameter file and run disksim.



john