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<p class=MsoNormal>All,<o:p></o:p></p>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal>Using the Pezca-0.4 source package, I was able to build and
install it into our central /apps version of perl without having to build or
make any parts of the EPICS distribution available to it. At runtime, the
package still needs access to a couple of EPICS shared libraries, but this is
easily arranged through LD_LIBRARY_PATH. The bottom line is that I have a
working example of this new configuration. If you access the URL: <a
href="http://claswebnew.jlab.org/cgi-bin/HALL_ABC/top_frame-MEW.pl">http://claswebnew.jlab.org/cgi-bin/HALL_ABC/top_frame-MEW.pl</a>,
you’ll see an example of the configuration at work. This page is a _<i>slighlty</i>_
modified version of the original -- <a
href="http://claswebnew.jlab.org/cgi-bin/HALL_ABC/top_frame.pl">http://claswebnew.jlab.org/cgi-bin/HALL_ABC/top_frame.pl</a>
which does not work.<o:p></o:p></p>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal>After building Pezca into /apps Perl, I made a small
modification to the top_frame-MEW.pl script mentioned above. All I had to do
was comment out the line: <o:p></o:p></p>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal> #use lib
('/group/clas/www/clasweb/htbin/PERL_CPAN/lib/site_perl/5.6.0/i686-linux');<o:p></o:p></p>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal>This change removes the explicit reference to the perl
library installation down in /group/clas/www/clasweb/… Since the script
uses /apps/bin/perl, it Is able to find the Pezca module in the apps build.<o:p></o:p></p>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal>To address the runtime dependence on the epics shlibs, I set
LD_LIBRARY_PATH in the web server configuration to include a temporary
directory into which I’ve placed the libca, libCom and libezca shared
libraries.<o:p></o:p></p>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal>This seems to work, though it’s hard to be sure since
I’m not very familiar with them.<o:p></o:p></p>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal>The problem is that with the explicit library reference,
there is no way to fix this without modifying all the scripts individually. You
guys have a number of scripts configured like this. Changing them now will
break them on the running clasweb. I can easily find and fix most of these
problems, but, I will need to do it as part of the cutover.<o:p></o:p></p>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal>So… given these results, if nobody sees any problem
with these changes, can we plan to do the switch to the new server today? I
will need to have both the new and old servers offline for an hour or two to
make all the necessary changes. Then, there will certainly still be other
problems that turn up afterward. These will need to be dealt with as they are
discovered. I think, however, that all the major stuff that has been seen has
been addressed.<o:p></o:p></p>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal>I should also point out that reverting back to the original
server in the event of insurmountable problems of some kind will require a
similar 1-2 hour outage to switch back. Personally, I hate to go back in
general, and in this case, RHEL3 (on the current clasweb) is obsolete and no
longer supported, and has been holding up a number of projects you guys have
asked for that require newer software versions – e.g. newer MediaWiki,
MantisBT, DocDB, etc.<o:p></o:p></p>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal>So, can I move forward with the switch? If so, when is a
good time?<o:p></o:p></p>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal>Marty<o:p></o:p></p>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal><o:p> </o:p></p>
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