Beefy Boxes and Bandwidth Generously Provided by pair Networks
Think about Loose Coupling
 
PerlMonks  

comment on

( #3333=superdoc: print w/replies, xml ) Need Help??
Of all the stuff I've seen on the current thread, this idea seems easiest and most sensible. And if there were going to be multiple instances of the same script running at once, all you need to do is add the pid ($$) to the file name as well.

Another way to avoid name collisions is to work out a unique name in a loop like this:

... my $append = "a"; while ( -e $id[$i] ) { $id[$i] =~ s/(?:\.[a-z]+)*$/.$append/; $append++; } `touch $id[$i]`; ...
Use a separate semaphore file to lock up this part, if necessary, to avoid race conditions among concurrent jobs. But this is probably overkill for the OP's task (and it takes more overhead -- without adding any real value -- relative to the simple time.pid.incrementer, which would only risk collision if concurrent processes were writing to one shared directory from different hosts, and happened to have the same pids at the same time -- wow, how unlikely is that?).

In reply to Re: Re: Use time() to create unique ID by graff
in thread Use time() to create unique ID by Anonymous Monk

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, 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?
    Username:
    Password:

    What's my password?
    Create A New User
    Chatterbox?
    and the web crawler heard nothing...

    How do I use this? | Other CB clients
    Other Users?
    Others contemplating the Monastery: (6)
    As of 2020-07-07 10:28 GMT
    Sections?
    Information?
    Find Nodes?
    Leftovers?
      Voting Booth?

      No recent polls found

      Notices?