anshumangoyal has asked for the wisdom of the Perl Monks concerning the following question:

I want to pump a variable traffic to an ethernet adaptor. For this i am using a utility which pumps the data. this utility takes -band <bandwidth> as input. I want to vary this bandwidth starting from 0 to reach 'x' and then come back to 0. For this can any one suggest a formula which gives me output in variance with this pattern?

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Re: Variable Load
by thmsdrew (Scribe) on Nov 15, 2012 at 13:14 UTC

    If you're executing this command within Perl--which I assume you are, and already have that working--then two for loops would suffice.

    One of them counting up.

    for (1..$x) {
    system("data_pump data -band $_");
}

    [download]

    The other counting down.

    for (reverse 1..$x) {
    system("data_pump data -band $_");
}

    [download]

    Also, if the bandwidth isn't increasing by 1 each time, which my code assumes, use a $count variable and increment it each time in the for loop to get the desired bandwidth intervals.

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Re: Variable Load
by karlgoethebier (Abbot) on Nov 17, 2012 at 10:16 UTC

    Perhaps one less is more.

    perl -e 'for((1..10),reverse(1..10)){print}'

    Regards, Karl

    «The Crux of the Biscuit is the Apostrophe»

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