war story: parallel(1) command

[D. Hugh Redelmeier]

DCB's mail still doesn't get through to the list.

| From: David Collier-Brown <davec-b-bJEeYj9oJeDQT0dZR+AlfA at public.gmane.org>
| To: tlug-lxSQFCZeNF4 at public.gmane.org
| Cc: Lennart Sorensen <lsorense-1wCw9BSqJbv44Nm34jS7GywD8/FfD2ys at public.gmane.org>,
|     D. Hugh Redelmeier <hugh-pmF8o41NoarQT0dZR+AlfA at public.gmane.org>
| Date: Mon, 29 Jul 2013 19:15:36 -0400
| Subject: Re: [TLUG]: war story: parallel(1) command
| Reply-To: davecb-0XdUWXLQalXR7s880joybQ at public.gmane.org
| 
| On 07/29/2013 05:47 PM, Lennart Sorensen wrote:
| > So not using parallel would probably be faster, since the disk could
| > avoid the head having to jump around between files.
| 
| Always do the experiment (;-))
| Try parallel 1, 2, 3 etc, realizing the answer will be different for
| different widths of stripe and on-disk cache.
| The load-versus-response-time curve should looks have a  shape like
| "_/", a hockey-stick with a near-horizontal foot, followed by an upwards
| turn and a long handle representing worse, worser and worsest performance.
| 
| --dave
| 
| 
| -- 
| David Collier-Brown,         | Always do right. This will gratify
| System Programmer and Author | some people and astonish the rest
| davecb-0XdUWXLQalXR7s880joybQ at public.gmane.org           |                      -- Mark Twain
| (416) 223-8968

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