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New VETRA v5r2

Condition Data Base

In the new release parameters for the processing algorithms can be defined in either STATIC or DYNAMIC modes. This part of the description will focuse on the DYNAMIC configuration and explain how to create the condition Data Base for the Vetra.

In the current version one needs to use two scripts to create a SQLite file with conditions. The steps are described below

1. Creation of the valid XML description of the conditions.

In order to create the file it takes to run a python script The script is located in the Vetra/v5r2/python directory. The file created by the script - VeloTELL1Cond.xml - will be placed in the Vetra/v5r2/VetraCondDB/Velo/VeloCondDB directory by default (the default location should not be changed by user at any rate!). VeloTELL1Cond contains a collection of TELL1 conditions that in turn contain processing parameters needed for both the emulation and the TELL1 boards configuration. The example of a condition containing just a single number:

<condition classID="5" name="VeloTELL1Board0">
  <param name="pedestal_enable" type="int">

and a vector of numbers:

<paramVector name="pedestal_sum" type="int">
   524288 524288 524288 524288 524288 524288 524288 ....

In order to create the data base file properly another xml file is needed that specyfies which conditions are to be put to the data base. The file is located in the same directory as VeloTELL1Cond.xml file and is called velocond.xml. A snipet of the xml code from the file is presented below:

<?xml version="1.0" encoding="ISO-8859-1"?>
<!DOCTYPE DDDB SYSTEM "../DTD/structure.dtd">
   <catalog name="VeloCondDB">
     <!-- R sensors - 0:41 -->
     <conditionref href="VeloTELL1Cond.xml#VeloTELL1Board0"/>
     <conditionref href="VeloTELL1Cond.xml#VeloTELL1Board1"/>

Each condition we want to have in the Condition Data Base should be declared there.

2. Writing xml condition into the SQLite file.

To create a valid SQLite data base file one needs to run a script called create_sqlite_file_from_xml.(c)sh located in Vetra/v5r2/scripts/ directory (just by executing source from the Vetra cmt/ directory). The script will search for the file with defined entry point to the data base (in our case the entry point is defined in the lhcb.xml file that can be found in the Vetra/v5r2/VetraCondDB/Velo/ directory. The most important part of the file from the Vetra point of view is:

<?xml version="1.0" encoding="ISO-8859-1"?>
<!DOCTYPE DDDB SYSTEM "DTD/structure.dtd">
  <!--  **********************************************************  -->
  <!--  *           LHCb Detector Description Data Base          *  -->
  <!--  *              new hierarchy detector setup              *  -->
  <!--  **********************************************************  -->
  <catalog name="dd">
 <catalogref href="VeloCondDB/velocond.xml#VeloCondDB" />

-- MarkTobin - 08 May 2008

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Topic revision: r2 - 2008-05-12 - TomaszSzumlak
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