Re: leave log files open

Why not?

I close my log files often on the basis of it not requiring that much IO...
but providing safety of the information therein in case of unforseeable behavior of external components*.

Cheers, Sören

*) like databases running out of space, admins killing my processes and other havoc.

(hooked on the Perl Programming language)

Comment on Re: leave log files open

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Re^2: leave log files open by BrowserUk (Patriarch) on Jun 12, 2013 at 13:51 UTC
Why not? Here's one reason: `cmpthese -1, { a=>q[ open O, '>', 'log'; for(1..10000){ print O chr(0)x80; } close O; ], b=>q[ for(1..10000){ open O, '>>','log'; print O chr(0)x80; close O; } ] };; (warning: too few iterations for a reliable count) s/iter b a b 1.30 -- -99% a 8.42e-003 15300% --` [download] A second reason is that the first consumes almost no resource; whereas the second consumes prodigious amounts of it. The times before and after the first: `a 5.546\|5.343\|0\|0 a 5.546\|5.343\|0\|0` [download] And the second: `b 5.578\|5.343\|0\|0 b 5.734\|6.375\|0\|0` [download] Whether you are just impacting every other process on your local server; or being billed for all that addition CPU & IO when running your process in the cloud; incurring 1000's of times more resource use in order to satisfy a dumb tool that is easily silenced is .... Its your dollar, you pick the adjective. With the rise and rise of 'Social' network sites: 'Computers are making people easier to use everyday' Examine what is said, not who speaks -- Silence betokens consent -- Love the truth but pardon error. "Science is about questioning the status quo. Questioning authority". In the absence of evidence, opinion is indistinguishable from prejudice.	[reply] [d/l] [select]

Replies are listed 'Best First'.

Re^2: leave log files open
by BrowserUk (Patriarch) on Jun 12, 2013 at 13:51 UTC

Why not?

Here's one reason:

cmpthese -1, {
    a=>q[ 
        open O, '>', 'log'; 
        for(1..10000){
            print O chr(0)x80;
        }
        close O;
    ],
    b=>q[
        for(1..10000){
            open O, '>>','log';
            print O chr(0)x80;
            close O;
        }
    ] 
};;
            (warning: too few iterations for a reliable count)

     s/iter      b      a
b      1.30     --   -99%
a 8.42e-003 15300%     --
[download]

A second reason is that the first consumes almost no resource; whereas the second consumes prodigious amounts of it.

The times before and after the first:

a  5.546|5.343|0|0
a  5.546|5.343|0|0
[download]

And the second:

b  5.578|5.343|0|0
b  5.734|6.375|0|0
[download]

Whether you are just impacting every other process on your local server; or being billed for all that addition CPU & IO when running your process in the cloud; incurring 1000's of times more resource use in order to satisfy a dumb tool that is easily silenced is .... Its your dollar, you pick the adjective.

With the rise and rise of 'Social' network sites: 'Computers are making people easier to use everyday'

Examine what is said, not who speaks -- Silence betokens consent -- Love the truth but pardon error.

"Science is about questioning the status quo. Questioning authority".

In the absence of evidence, opinion is indistinguishable from prejudice.

[reply]
[d/l]
[select]