Particle

Short description: 
Introduction to grid computing in the particle physics subdepartment

Oxford plays a strong part in the  UK's GridPP Project by being part of SouthGrid.
The local Grid cluster forms Oxford's contribution to the Tier 2 centre. The cluster is located at the Begbroke Science Park.

The cluster supports all the major LHC VOs (Virtual Organisations), and many more which are part of the EGI project.

Categories: Grid | Particle

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Connecting to PP Interactive Servers

The only methods to connect to the interactive servers are via either SSH or Remote Desktop Protocol. For security reasons, users cannot connect directly to these services, but must connect via a bastion or proxy service.

Connecting to the Interactive Servers via SSH

From Windows 10 OS

PuTTY is the preferred option – available from “Physics Self Service” on department-managed systems.​

Categories: Linux | PP | Particle | Unix | ppunix

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How to manage files and directories in data areas

Introduction/Scope

This page documents how to tidy up files and directories in data areas. The documentation contains specifics for LHCb and ATLAS data areas, but some of the info is useful for other data areas and home directories.

NOTE: Data areas are not backed up!!

Categories: Linux | PP | Particle | Unix | ppunix

PBS batch system is no longer supported, please use HTCondor Batch System

Categories: Linux | PP | Particle | Unix | ppunix

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The current strategy in Particle Physics is to use commodity priced systems running Microsoft Windows for the desktop. These provide all the usual applications, MS Office, Email, etc and access to Particle Physics Unix servers via X Windows (Exceed)

The general purpose Linux login servers are pplxint12 and pplxint13, running Enterprise Linux 9 (EL9) operating system.

These interactive servers gives access to a HTcondor batch system running several EL9 worker nodes. All machines remain switched on except for during minimal maintenance periods.

In case of software or hardware problems, the system may have to be taken down at short notice. Any problems should be directed to itsupportATphysics.ox.ac.uk

Categories: Linux | PP | Particle | Unix | ppunix

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Remote access to the ppunix cluster

Direct logins using X are a problem because it's unencrypted; that means that your username and password go over the network visible to anyone bothered enough to look for them. The following set up avoids direct log-ins and demonstrates the set up of key based (passwordless) authentication.

SSH access through puTTY

The departmental Windows machines allow you to use PuTTY to connect to any of the interactive machines and use the command line. See the instructions in the "Using PuTTY from Windows" section.

Categories: Linux | PP | Particle | Unix | ppunix

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Best Practice for Using Particle Physics Interactive Nodes

Logging in

It is assumed that you have your Windows machine set up as-per these instructions.

Categories: Linux | PP | Particle | Unix

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Go-to page for PPUnix queries

For support email the itsupport team which will create a ticket and be seen by all the team.

Categories: Linux | PP | Particle | Unix | ppunix

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Graphical display from Linux to Windows - Configuring Exceed to run as an Xserver on a windows machine

Click on start->All Programs ->Open Text Exceed 14 x64->Exceed Tools->Xconfig

exceed1_png_15983.png

Select 'Security' and check the No Host Access box.

Categories: Linux | Particle | Unix | X | graphics | pplxint5 | pplxint6

The LHCb particle physics experiment is developing an object orientated software environment known as Gaudi. This framework is intended to apply to all event data processing applications including trigger, simulation, reconstruction and user analysis. To meet these goals, Gaudi has been designed to be easily customisable to different tasks and to allow for the possibility to incorporate components from other frameworks.

Categories: Grid | Particle