Re: cpp pre-req to start pcp/pmcd?

[Troy Dawson <dawson@xxxxxxxx>]

Howdy,
This has been such a part of how we use pcp here at Fermilab that I forgot 
about it.
We have several hundred farm nodes that don't have cpp or any compiler. What 
we have is a seperate rpm called pcp-config.  In this, besides having config 
files that are specific for our lab, we also have the the following three 
files that were made on a machine that had cpp.  (To have them made, just 
start pcp once and they get made.)

/var/pcp/pmns/root
/var/pcp/pmns/root.bin
/var/pcp/pmns/stdpmid

So when this get's installed, we remove the .NeedRebuild file, move these 
files into place, and everything works.
There are a couple of catches.
Make sure you make the files on a similar platform.  So RedHat 9's work with 
RedHat 9, while all of the RedHat 7's worked on each other (7.1, 7.2, 7.3)
If you add more pmda's, you have to rebuild these files.  Since we just use 
the standard out of the box pmda's, this part is easy, but it could be more 
difficult if you are still trying out different pmda's.

Hope this helps.
Troy

Ken McDonell wrote:
> Hmm ... this is a documentation oversight ... on IRIX systems, you
> cannot relink the kernel without cpp so _every_ IRIX system has a cpp
> variant lurking somewhere.  This is not necessarily true for other OS
> variants.
>
> The PCP performance metrics name space (PMNS) may use #define and
> #include directives ... as a work around, check your /var/pcp/pmns/root
> and remove directives by equivalent hand editing, and then make one of
> the cpp paths below a link to "cat".
>
> But you'll next run into problems with installing the PMDAs, because
> their local fragments of the PMNS also use cpp directives.
>
> So you will need to install cpp eventually.
>
> I'll try and figure out the right place to document this.
>
> On Tue, 12 Aug 2003 jerry.mlist@xxxxxxxxxx wrote:
>
>
> > pcp version: pcp-2.3.1-4
> > OS: Linux
> >
> > I have a cluster I'd like to run pmcd collectors on.  The compute
> > nodes do not presently have cpp available, which appears to be
> > required (see below).
> >
> > Is there any work-around short of installing gcc/cpp on all the
> > compute nodes?  I looked through the User/Admin Guide, FAQ, and pcp
> > list archives and did not find any mention of this.
> >
> > Thanks for any feedback,
> >
> > Jerry
> >
> > ---
> >
> >
> > # /etc/init.d/pcp start
> > Performance Co-Pilot rebuilding PMNS ...
> > pmLoadNameSpace: Unable to find an executable cpp at any of ...
> >    /lib/cpp
> >    /lib/cpp
> >    /usr/cpu/sysgen/root/lib/cpp
> >    /usr/lib/cpp
> >    /usr/cpu/sysgen/root/usr/lib/cpp
> > Sorry, but this is fatal
> > Rebuilding the Performance Metrics Name Space (PMNS) in /var/pcp/pmns ...
> > Rebuild: PCP upgrade processing for "root" PMNS changes ...
> > Rebuild: merging the following PMNS files:
> > root root_linux root_pmcd
> > Rebuild: pmnsmerge failed
> >         "root" and "root.bin" have not been changed.
> > Performance Co-Pilot starting PMCD (logfile is /var/log/pcp/pmcd/pmcd.log) ...
> > Performance Co-Pilot starting archive loggers ...

--
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Troy Dawson  dawson@xxxxxxxx  (630)840-6468
Fermilab  ComputingDivision/OSS  CSI Group
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