Tutorial Overview
James Walder
Lancaster University
Introduction and Tutorial Format
•
Welcome to the ATLAS UK software tutorial at Edinburgh.
•
This morning is devoted to these introductory talks and a
•
•
•
•
test session to make sure everybody is setup correctly.
After lunch we will focus on some of the tools that will be useful for finding and
using data:
•
•
•
•
We will look at the Run Query Tool for locating interesting runs;
AMI for dataset search and metadata information;
DQ2 for dataset file access;
And if time allows, Good Run Lists;
All these tools will be used to then setup and run an Athena analysis locally on
lxplus - and hopefully obtain your own resonance mass peak on real data!
•
•
We will not cover a full tutorial on how to use Athena,
Some topics briefly covered, but please ask questions if you are new to this.
The tutorial will concentrate more how to using the tools, rather than the
history / philosophy of them.
2
James Walder
First session
•
The first session is aimed at people with little or no experience on using Athena,
lxplus, the Grid, and their related tools.
•
The aim of the session is to try and get a resonance peak from real data, using
some of the tools most commonly used for distributed and local analysis.
Find interesting runs
Run Query Tool
Identify the container names
holding the data
AMI
Download some (small) set of
the data
DQ2
Build the Athena code with
analysis packages
Athena
Run over the data and build
the invariant mass
distribution.
Construct a GoodRunList
selection
RunQueryTool
Rerun Athena excluding bad
luminosity blocks
•
•
•
Work through the TWiki at your own pace, and let us know if you have questions.
There will be talks on these topics as we go along.
Some more advanced tutorials are available for
3
James Walder
Format (cont.)
•
•
•
The second half of the afternoon, and day-2 will then focus on:
•
•
Use of the Grid for physics analysis and,
the use of TAGs.
Desktops are available, or use you own laptop if preferred.
There are participants with a broad range of expertise here,
so the format of the tutorial is designed to be quite
informal and flexible.
•
•
It is not expected that all tasks will be finished in the two days.
•
Most importantly; ask the experts questions whenever you have a query
or problem - it’s the quickest way to learn.
There may be many ways of accomplishing the same task,
so don’t be surprised if you see something done a little differently to
what you are used to.
4
James Walder
Comments
•
•
If you already have setup a cmthome area on lxplus,
•
I recommend renaming this directory and starting a
new cmthome area as outlined in the TWiki.
•
Your original directoy can be moved back after the tutorial.
If you did not apply for scratch space, I would suggest that you do this now:
•
email atlas-support@cern.ch (from your cern email address) with your
username and a request for scratch space:
•
•
will get a space ~/scratch0 : This is not backed-up.
Should be done before tomorrow.
•
•
TWiki refers to $HOME/scratch0 in cmthome/requirements file.
If you don’t have scratch space yet remove scratch0.
5
James Walder
Security Exceptions
•
On some websites, you may see the following connection problem:
•
Click on the blue link and follow the instructions to add a (permanent)
exception for this server.
6
James Walder
Lets get started!
7
James Walder