Dear monks,

I 'd like to know if doing the following is possible. If it is, some insights on how to proceed or where to look would be highly appreciated.

Basically, I have one file of 100 GB having dna sequences holding on exactly 4 lines for each sequence entries. Is it possible to launch multiple child process (multicore machine) to access simultaneously different part of the file, perform some calculation and write to an output. I don't know how to specify which part of the file each processes will work on.

I know this kind of work is feasible by splitting the file with say the split command and write a fork::manager loop, but would like to save time in avoiding writing new split files to disk.

Thanks! Julio

In reply to multiple processes to access one file by julio_514

Title:
Use:  <p> text here (a paragraph) </p>
and:  <code> code here </code>
to format your post, it's "PerlMonks-approved HTML":


  • Posts are HTML formatted. Put <p> </p> tags around your paragraphs. Put <code> </code> tags around your code and data!
  • Titles consisting of a single word are discouraged, and in most cases are disallowed outright.
  • Read Where should I post X? if you're not absolutely sure you're posting in the right place.
  • Please read these before you post! —
  • Posts may use any of the Perl Monks Approved HTML tags:
    a, abbr, b, big, blockquote, br, caption, center, col, colgroup, dd, del, details, div, dl, dt, em, font, h1, h2, h3, h4, h5, h6, hr, i, ins, li, ol, p, pre, readmore, small, span, spoiler, strike, strong, sub, summary, sup, table, tbody, td, tfoot, th, thead, tr, tt, u, ul, wbr
  • You may need to use entities for some characters, as follows. (Exception: Within code tags, you can put the characters literally.)
            For:     Use:
    & &amp;
    < &lt;
    > &gt;
    [ &#91;
    ] &#93;
  • Link using PerlMonks shortcuts! What shortcuts can I use for linking?
  • See Writeup Formatting Tips and other pages linked from there for more info.