[Pdx-pm] [csieh at fnal.gov: Re: Horribly Broken RHEL5/SL5 Perl]
keithl at kl-ic.com
Tue Aug 26 10:27:02 PDT 2008
I spoke too soon. Sigh, no distro support on this one. OK,
for the complete Perl noob, how does one go about maintaining
two versions of Perl on a machine, one for "system" and one
for everything else including serving web pages?
Understandable, updated, robust and secure is good. I fear
the only option is a large learning and maintenance burden.
----- Forwarded message from Connie Sieh <csieh at fnal.gov> -----
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Date: Tue, 26 Aug 2008 11:39:41 -0500 (CDT)
From: Connie Sieh <csieh at fnal.gov>
Subject: Re: Horribly Broken RHEL5/SL5 Perl
In-reply-to: <0K67006QWTPV92 at mailgw2.fnal.gov>
To: keithl at keithl.com
Cc: SCIENTIFIC-LINUX-USERS at listserv.fnal.gov
On Tue, 26 Aug 2008, Keith Lofstrom wrote:
>This just in:
>Summary: The Upstream Vendor version of Perl has a patch to the
>"bless" function that makes it /extremely/ slow. Most of us do
>not write that kind of of fancy Perl, but a lot of us use one of
>the 1500+ CPAN modules that do. The slowdown can be over 100x
>with some programs. This affects Fedora 9 as well as the various
>version 5 distros.
>TUV-patched Perl version 5.8.8 also breaks the Math::GSL package
>that I wrote about a few days ago. It runs fine with 5.10 .
>What to do? Some people are downloading and recompiling Perl;
>we have version 5.8.8, while version 5.10 is available . A few
>are abandoning Perl. A few are abandoning TUV-inspired distros.
>A few are buying way more hardware than they would otherwise need.
>Since some of the scientific community (especially the life sciences)
>are running huge amounts of Perl, this is probably a Big Deal. We
>should explore the problem further with TUV and the CentOS community.
>If a fix is not forthcoming from TUV, I reluctantly suggest that we
>get together with the CentOS people and fork this portion of the
>distro, perhaps standardizing on Perl 5.10 . There are people
>in the Perl community ready to assist us.
There is merit in having your own "application" perl vs using the "system"
perl for everything. That way you can "decide" .
It is NOT a good idea to replace the "system" perl.
----- End forwarded message -----
Keith Lofstrom keithl at keithl.com Voice (503)-520-1993
KLIC --- Keith Lofstrom Integrated Circuits --- "Your Ideas in Silicon"
Design Contracting in Bipolar and CMOS - Analog, Digital, and Scan ICs
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