LHCb Software At Nikhef: Prepare for Workshop 22-24 June 2009

Your first time to run over a MicroDST at Nikhef

Prepare ssh on your Nikhef account

Follow these instructions: Configuring SSH access from Linux/Unix

Logon at Nikhef

ssh user@ribble.nikhef.nl
ssh stbc-16   (on stoomboot)

Get software packages

mkdir cmtuser
cd cmtuser
source /project/bfys/lhcb/sw/setup.sh   # for sh, bash, ksh, zsh
source /project/bfys/lhcb/sw/setup.csh  # for csh, tcsh
SetupProject --build-env DaVinci v23r1
getpack --user=CERNUSERNAME Ex/MicroDSTExample jpalac_20090610_1

(NB: zsh-users should add 'setopt SH_WORD_SPLIT' to their .zshrc )

Loop over events

SetupProject DaVinci v23r1
cd ~/cmtuser/DaVinci_v23r1/Ex/MicroDSTExample/python
python -i MicroDSTReadingExample.py --input /data/bfys/h71/Workshop/SeqDC06selBs2JpsiPhiWithMC_50.0_Kevt_NoPVReFit.dst

Plot

>>> massPlots[443].Draw()
>>> massPlots[531].Draw()
>>> massResPlots[531].Draw()
>>> propTimePlots[531].Draw()
>>> Ctrl-D

Introduction to Python

It is important that attendees make themselves familiar with the python programming language, at least at the level of writing simple scripts.

Extensive tutorial: [http://doc.python.org/tutorial Tutorial]


<pre>

== Install a Virtual Machine on laptop (windows): CernVM ==

See talk by Pere Mato, slide 14:
[http://indico.cern.ch/conferenceDisplay.py?confId=52399 17 March 2009]

CernVM beginner's guide:
[https://twiki.cern.ch/twiki/bin/view/Atlas/CernVMGuideDetail CernVM beginner's guide]


''' 1a) Download VMware player under Windows '''

Download vmware player [http://www.vmware.com/download/player/ here]
<pre>
Unzip and put CernVM in fixed place. For example C:\Program Files\CernVM
Start vmplayer from desktop
Open CernVM from C:\Program Files\CernVM
Open in browser: http://192.168.204.128:8004/
                 (your number might be different!)
Create account. For example: use lxplus username and password
Virtual organization: lhcb
Change memory allocation in vmware player
  -> troubleshoot
     -> change memory allocation
         -> 1024 MB

1b) Download VMware player under MAC

1c) Download VMware player under Linux

2) Start CernVM

Follow CernVM beginner's guide step by step: CernVM beginner's guide

3) Start Exceed + SSH

Start exceed
Start ssh
Connect to vm with ssh to 192.168.204.128
     (Your number might be different!)
     (fink tunnel x11 connections in ssh!)

4) Configure CernVM

(once for configuring cernvm:)
back to instructions afs
sudo conary update openafs=1.4.8-1-1
sudo conary update openafs-client=1.4.8-1-1
sudo conary update openafs-kernel=1.4.8-1-1
sudo /etc/init.d/afs start

5) CernVM session on ssh

Never do: ls /opt/ !! (It could start caching all atlas software...)

kinit user@CERN.CH (capitals!)
cd /opt/lhcb
source /opt/lhcb/LbLogin.csh
SetupProject Gaudi v21r0
python $GAUDIEXAMPLESROOT/python/HistoEx.py
SetupProject Bender v12r0
cd $BENDEREXAMPLEROOT/python/BenderExample/
./Phi.py

6) Create shared data folder on your laptop

Make folder C:\Data
Change properties of C:\Data
   -> sharing
     -> network sharing without wizard
       V share
          name: Data
       V allow 

Edit the 2kB VMware configuration file (in C:\Program Files\CernVM\ ) and add:

sharedFolder.maxNum = "1"

sharedFolder0.present = "TRUE"
sharedFolder0.enabled = "TRUE" 
sharedFolder0.readAccess = "TRUE"
sharedFolder0.writeAccess = "TRUE"
sharedFolder0.hostPath = "C:\Data"
sharedFolder0.guestName = "data"
sharedFolder0.expiration = "session"

usb.autoConnect.device1 = ""

NB: after editing the configuration file, restart VMware Player

In VMware:
  -> Share folders
     -> o always enabled

Add the following line to /etc/fstab:
sudo emacs -nw /etc/fstab
     .host:/ /mnt/hgfs vmhgfs defaults 0 0

sudo ln -s /usr/sbin/mount.vmhgfs /sbin

I edited Phi.py and put input data location: /mnt/hgfs/data/Bs2DsK_1.dst )
Data can be found here:
/afs/cern.ch/lhcb/group/calo/ecal/vol10/DATA
(or ask Niels or Vanya for a copy...)

Once everything is installed... Start CernVM

Start VMware Player (don't select 'Open', but 'Recent')

Login to your CernVM with your SSH.

source /opt/lhcb/LbLogin.csh
SetupProject Bender v12r0
./Phi.py

root 
TBrowser f
.q