Intructions for Starting a Run

Version of May 12, 2008

Trouble starting MIDAS or Frontend daemons?
Try using pendaq.
pc7196]$ pendaq -help



Assuming all pc's are up and running, and the drivers are installed in the frontends, you may follow this procedure.

If you reboot FE0 or FE1 or FE2, you must re-install the drivers for the CAMAC interface (FE0), VME interface (FE1) and Acqiris Digitizer (FE2)

You should start fe0 program before fe1 and fe2. You will most likely start all the programs from the Backend computer (pc7196), so you might want to open at least five terminal windows.


• In the first terminal start the daemons:
  
  You should check to see if the daemons are already running before you start them so you don't have multiple instances of them. If the daemons are already running (if they are "green" on the status->programs webpage), you don't have to restart them!
  
  If you suspect they are causing problems, you can kill them, then restart them. You can kill them by executing the following command TWICE for each process (mhttpd, mevb, mlogger, analyzer), for example,
  
  pc7196]$ killall mlogger
  pc7196]$ killall mlogger
  mlogger: no process killed
  
  Then:
  
  pc7196 ~]$ cd ~/online/
  pc7196 ~]$ mhttpd -D
  pc7196 ~]$ mevb -D
  pc7196 ~]$ mlogger -D
  pc7196 ~]$ cd online/analyzer_root
  pc7196 analyzer_root]$ ./analyzer -D
  



• In the second terminal start Frontend0:
  
  pc7196 ~]$ ssh -Y pc6166
             enter canonical pibeta password (only if asked!)
  pc6166 ~]$ cd ~/online/fe0
  pc6166 fe0]$ ./fe0 -i 0 -h pc7196
  
  The key "-i 0" tells it that it is the #0 frontend.
  The key "-h pc7196" tells it the host (or Backend) where MIDAS is running.
  



• In the third terminal start Frontend1:
  
  pc7196 ~]$ ssh -Y pc809
             enter canonical pibeta password
  pc809 ~]$ cd ~/online/fe1
  pc809 fe1]$ ./fe1 -i 1 -h pc7196
  



• In the fourth terminal start Frontend2:
  
  pc7196 ~]$ ssh -Y sluser@pcp027992
             enter canonical pibeta password (while the user here is "sluser")
  pcp027992 ~]$ cd ~/online/fe2
  pcp027992 fe2]$ ./fe2 -i 2 -h pc7196
  



• In the fifth terminal start the Slow Control Frontend:
  
  pc7196 ~]$ ssh pc4926
  pc4926 ~]$ cd online/sc_fe
  pc4926 sc_fe]$ ./sc_fe -h pc7196
  



• Now start mozilla/firefox and go to:
  
  http://pc7196
  To see our status page. Click on programs to make sure you have the full set.
  Click on status, make sure all programs listed are "green".
  
  Start the run.
  
  In the messages section you may see a "db_get_data,ERROR" red line.
  Do not worry about this, it is a bug in the latest version of MIDAS.
  
  
  
  
  N. Khomutov 12 May 2008