Beefy Boxes and Bandwidth Generously Provided by pair Networks
Pathologically Eclectic Rubbish Lister

Comment on

( #3333=superdoc: print w/replies, xml ) Need Help??
I am doing some stress testing on a system. I am running 5.8 on Mac OS X. One of the things we need to do is open up a very large number of files. I figured using perl there would be an easy way to open 50,000 files and write to them once in a while. But I ran into two questions.

First is there a way to make an array of filehandles? I was in a hurry so I just programmatically generated a script with a bunch of opens, but this seems lame. The script basically looks like this:
mkdir "/tmp/lotsofopenfiles$$"; open (FILE1, ">>/tmp/lotsofopenfiles$$/1") || warn "$!"; print FILE1 "0"; open (FILE2, ">>/tmp/lotsofopenfiles$$/2") || warn "$!"; print FILE2 "0"; #etc...
Second when I run this I seem to be running into an open file limit of 250 files per process. I have set ulimit to unlimited, and tried running as root but didn't get past this. I looked in the docs to see if I could find anything on open file limits, but didn't find anything. Does anyone know what might be going on here? Here is the error:
Too many open files at line 510. print() on closed filehandle FILE252 at line 511. Too many open files at line 512. print() on closed filehandle FILE253 at line 513.
Any advice in terms of alternate approaches etc. would be appreciated.

In reply to Perl limits on number of open files? by moof1138

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, 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, 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.
  • Log In?

    What's my password?
    Create A New User
    and all is quiet...

    How do I use this? | Other CB clients
    Other Users?
    Others studying the Monastery: (4)
    As of 2018-05-20 10:42 GMT
    Find Nodes?
      Voting Booth?