I have several servers in a multiple load balancing situations. They are running Windows2000, with IIS as the web server. The contents of one set of servers are constantly changing due to user uploads (these two are always in sync, as copy commands are given as each file is uploaded/deleted). At a later time, these files are then copied over to another set of Load Balanced servers, using File::Copy.
My question is if at a later date, I want to only move over changed files, can I compare them using 
if (-M $File1 != -M $File2) {
    copy ($File1, $File2);
}

[download]
or is the assumption that the last modified time does not survive the copy. My experience has been that if you copy a file, it maintains its last modified time, but I would like some confirmation that this is true. Any insight into this would be greatly appreciated.

Thanks
Dave

Edit 2001-03-15 by tye, changed title

In reply to Preserving "last modified" time stamp when copying files with File::Copy by dfog

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.