Re: [ROOT] environment variables in a PROOF session

From: Fons Rademakers (Fons.Rademakers@cern.ch)
Date: Thu Nov 14 2002 - 16:08:20 MET


You can execute and script from the remote proof session by doing:

gProof->Exec(".x setup.C")

where setup.C is local on your machine and upon execution of the Exec()
code send to the proof master and all slaves.


Cheers, Fons.


On Thu, 2002-11-14 at 14:19, Piergiorgio Cerello wrote:
> thanks Fons,
> just one additional question: what about environemnt variables whose
> values are unknown to the user starting the PROOF master?
> For example, variables related to the parametrization of the node
> configuration (i.e., input location, shared libraries location, etc.).
> should they be read from a standard configuration file or is there a way
> to force the execution of a login script for the remote proof session?
> ciao,
> piergiorgio
> 
> 
> 
>                                               Piergiorgio Cerello
>                                               I.N.F.N. Sez. di Torino
>                                               Via P. Giuria 1
>                                               10125 - TORINO, Italy
>                                               Tel. +390116707416
>                                               Fax. +390116707417
> 
> On 13 Nov 2002, Fons Rademakers wrote:
> 
> > 
> > On Wed, 2002-11-13 at 15:22, Piergiorgio Cerello wrote:
> > > Hi evereybody,
> > > I have a couple of questions about PROOF remote session. In particular:
> > > 
> > > - how to set environment variables in remote sessions
> > 
> > via gProof->Exec():
> > 
> > root [0] gROOT->Proof()
> > **** Welcome to the PROOF server @ pcsalo.cern.ch ****
> > **** PROOF slave server @ pcsalo.cern.ch started ****
> > **** PROOF slave server @ pcsalo.cern.ch started ****
> > PROOF set to parallel mode (2 slaves)
> > root [1] gProof->Exec("gSystem->Setenv(\"AAP\",\"pipo\")")
> > (Int_t)0
> > root [2] gProof->Exec("gSystem->Getenv(\"AAP\")")
> > (const char* 0x8533b7c)"pipo"
> > (const char* 0x8533b7c)"pipo"
> > (Int_t)0
> > 
> > > - how to start a PROOF remote session with an extended executable (for 
> > >   example, aliroot).
> > >   I could start root and load the shared libraries dynamically, but I
> > >   should extend the path. Otherwise, how can I associate to the
> > >   remote proof session a command other than "root"? 
> > 
> > in the remote sessions we will have something as root.exe running. We
> > cannot run arbitrary executables. However, once the package manager is
> > finished it will be easy to package all aliroot shared libs in a proof
> > package and distribute that over all nodes:
> > 
> > gProof->UploadPackage("aliroot.par")
> > 
> > and load all shared libs using:
> > 
> > gProof->EnablePackage("aliroot")
> > 
> > 
> > Cheers, Fons.
> > 
> > 
> > -- 
> > Org:    CERN, European Laboratory for Particle Physics.
> > Mail:   1211 Geneve 23, Switzerland
> > E-Mail: Fons.Rademakers@cern.ch              Phone: +41 22 7679248
> > WWW:    http://root.cern.ch/~rdm/            Fax:   +41 22 7679480
> > 
-- 
Org:    CERN, European Laboratory for Particle Physics.
Mail:   1211 Geneve 23, Switzerland
E-Mail: Fons.Rademakers@cern.ch              Phone: +41 22 7679248
WWW:    http://root.cern.ch/~rdm/            Fax:   +41 22 7679480



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