Hello Monks:
Merging the huge text files ( each text files having more than 10 MB of data), is taking signficant time, few times to merge 4 text files, it is taking more than 8 minutes.

Code which i have written is as follows. Please advise, if there is any better way of writing, that takes less time 

my $MergedFileName="MergeOutput.txt"; 

# Read the logs file into an array, with .txt extention sorted with ti
+mestamp existing in the filename
opendir(DIR, '.') or die "Input file not avialable Error #: .$!";
my @filesRead = sort(grep(/\.txt$/,readdir(DIR)));
closedir(DIR);

# Open the Output file
open(MAINOUTPUT,">MergedFileName") || warn "Can't open file\n";

# Start merging file into main file by reading each file, line by line
   FILE: foreach (@filesRead) {
      open(FILE, $_) || ((warn "Can't open file $_\n"),next FILE); 
            while (<FILE>) { 
          print MAINOUTPUT $_; 
      } 
      close(FILE); 
   } 
   
 close(MAINOUTPUT);
# Merging of the files is done

[download]

In reply to How to merge Huge log files (each 10 MB) into a single file by lnin

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.