A Brief Introduction to the Run Query Tool
James Walder
Lancaster University
http://atlas-runquery.cern.ch/
•
With thanks to Jörg Stelzer, from whom I’ve based much of this material
What is the Run Query Tool?
•
•
•
As with the other talks I will not discuss the fundamentals of various tools,
•
So what is this run query tool?
•
A web (and command-line python based) interface to examine run and
luminosity block level information for particular runs.
When would I use it?
•
•
•
Just why you might like to use these tools and what they can offer you.
For early data and looking at recent runs,
•
this tool will be useful for interactive work, and in performance studies.
For main analysis the Run Query Tool can be used to generate the Good
Run Lists (GRLs) ( more on this later).
Why use it?
•
It provides a good graphical interface that consolidates information that is
otherwise scattered around the Atlas databases,
•
•
which would be otherwise difficult to access.
Allows search criteria across broad spectrum of Atlas / lhc conditions
2
James Walder
Usage
•
•
•
•
•
Can also be run from command line (once athena release is setup) AtlRunQuery.py.
Queries can be submitted on criteria such as:
•
•
run / time, #events
(sub) Detector status; data quality, LHC status
Usage: Input string delimited by ‘/’;
•
•
•
http://atlas-runquery.cern.ch/
search criteria is writen first
•
Find run 142190+ , or f r 192190+
display criteria is written after the ‘/’: e.g.
•
show all, show dq,
Output can be tailored, depending on need; can show:
•
•
Overall general information
Stream output names and dataset names, inc. which datasets distributed to the Grid
XML and root-file outputs are also created based on input criteria for download.
3
James Walder
Run Query: examples
•
Simple examples based on December running:
•
Good runs with stable beams:
find run 141748+ and lhc stablebeams true / show time and lhc
http://atlas-runquery.cern.ch/query.py?q=f+r+141748%2B+and+lhc+stablebeams+t+%2F+sh+t+and+lhc
•
•
Data quality: find run 141748+ / show r and dq pix,sct,trt
http://atlas-runquery.cern.ch/query.py?q=find+run+141748%2B+%2F+show+r+and+dq+pix%2Csct%2Ctrt
4
James Walder
Tasks in this session
•
•
•
Use the run query tool to try and find some ‘good’ data taken last December.
•
You should be able to use the time search criteria or,
•
As a hint the run range should be between 141748 - 142406
You want a run with large set of statistics and with “stablebeams true”
The inner detector (SCT and pix) should also be switched on.
•
•
This corresponds to the data09_900GeV (and data09_2TeV projects)
You will also want the solenoid magnetic field on.
You should come up with a list of a few runs that will would satisfy your criteria as
being a ‘good run’.
•
•
Note that not all luminosity blocks within a run need to be good.
You can (and in reality should) look at the data quality of the inner detector
components for the particular runs.
•
•
•
use “find r ... / show r and dq” to list information (look in the tabs for
more information)
Make a note of the run query you entered, if there is time, we will return to this.
It can be a little slow at times, so remain patient
5
James Walder