I don't see why not. Following is one possible way. This should break up your 8 GB file into 512 MB files 1 MB at a time. It's untested as I don't have an 8 GB file handy, but should give you the idea.

my $filename = 'foo'; my $bufferSize = 1,000,000; my $outFileSize = 512; open (IN, $filename); binmode IN; seek (IN, 0, 0); my $buffer; my $i = 1; my $j = 1; open (OUT, "$filename$i"); while (read (IN, $buffer, $bufferSize)){ if ($j > $outFileSize){ $j = 1; $i++; close OUT; open (OUT, "$filename$i"); } print OUT $buffer; $j++; } close OUT;

UPDATE: No I don't manufacture hard drives, so as Fletch correctly points out, $bufferSize should be 1048567 bytes. Oh, and leave out the commas.


In reply to Re: splitting a file by hangon
in thread splitting a file by boby

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.