1. The EDG Testbed Deployment Details
The European DataGrid Project

2. Contents Current EDG Testbed EDG Logical Machine Type
Hardware Components of an EDG Testbed

3. Current EDG Testbed Core Sites NorduGrid: Bergen Copenhagen Helsinki
Lund
Oslo
Stockholm
Uppsala
NorduGrid is as a Grid infrastructure in the Nordic countries
Reference site: CERN
Testbed1 EDG sites
NorduGrid
Manchester
NIKHEF
RAL
Italy:
Bologna
Cagliari
Catania
Milano
Padova
Parma
Pisa
Roma
Torino
21 sites
CERN
Lyon
The current EDG Testbed is set up on 21 sites in 8 European countries, CERN being the reference site.
A total of about 340 Machines is currently available. Most of these machines are dual processor machines. Some machines are exclusively used for EDG, others (especially some WN clusters) are shared with other users.
These machines are split into two different Testbeds: a production one for running application and a developing one for integrating and testing the Grid software developed with the EDG project.
The NodruGrid has the aim of creating a Grid infrastructure in the Nordic countries. Its partners come from Denmark, Norway, Sweden, and Finland.
It wants to be the Nordic branch of the EU DataGrid (EDG) project Testbed.
About 400 machines are available.
Most of them are dual processor.
Some machines are only used for
EDG.
They are split into:
- Production
- Development
Core Sites

4. EDG Logical Machine Types
User Interface (UI)
Resource Broker (RB)
Information Service (IS)
Computing Element (CE)
Gatekeeper
(Front-end Node)
Worker Nodes (WN)
Storage Element (SE)
Replica Catalog (RC)
The systems and services provided by the EDG are logically clustered in 6 machine types, each of which serving a particular purpose:
The User Interface (UI) hosts all client programs with which the user may interact with the Grid. This is the place from where a user retrieves information on the grid and submits his jobs.
The Information Service machine runs the EDG information services while the
Replica Catalog machine hosts the data information service – the Replica Catalog.
Storage Elements provide storage resources on the Grid (in particular access to mass storage systems) while
Computing Elements furnish CPU power. CEs are typically clusters consisting of Worker Nodes and a Frontend Node that manages the WNs.
Finally, the Resource Broker orchestrates all activities on the Grid. Specifically, it schedules user jobs on appropriate CEs.

5. Testbed Site ConfigurationUI
User Interface CE
Computing Element WN
Worker Node SE
Storage Element
Minimal Testbed
Proxy
Proxy renewal RB
Resource Broker
LCFG
Installation Server
In a physical EDG Testbed the logical EDG machines need to be mapped onto physical machines.
For storing data a storage element is also required.
Finally, the information service, replica catalog, resource broker, and user interface needs to be set up on a machine. For these services either one of the computing or storage elements may be used or, as in the figure, a separate machine is set up. If enough machines are available, each of these logical machines may be mapped to a separate physical one, as well. RC
Replica Catalog
MDS
Meta Data Server

6. Example CERN Testbed Structure
Total of 86 nodes
3 Major and several minor testbeds
Production (Application Testbed) 27 nodes
Development 7 nodes
Integration for next major release 7 nodes
Infrastructure
2 NFS server with 1 Tbyte mirrored disk
NIS server to manage user accounts
LCFG servers for installation

7. CERN Production TestbedSE
lxshare0393 CE
lxshare0399
WNs
lxshare
lxshare
lxshare0377
NIS
lxshare072d UI
testbed010
NIS Domain
NFS
Lxshare072d+73d
Provides:
/home/griduserxxx
/flatfiles/SE00/VOXX
LCFG
lxshare0371
Installs and configures
(almost) all nodes
Proxy
lxshare0375
MDS
lxshare0225 RC
lxshare0226
RB1
lxshare0382
RB2
lxshare0383

8. Services per Machine Type
Deamon UI IS
CE (frontend) WN SE RC RB
Globus Gatekeeper - 
Replica Catalog
GSI-enabled FTPd
Globus MDS
Info-MDS
Resource Broker
Job Submission
Information Index
Logging & Bookkeeping
Local Logger
CRL Update
Grid mapfile Update
RFIO
GDMP
This table gives an overview on the different services that need to be available on each of the EDG machine types.
Two machine types do not run any service: the user interface and the worker node. On the user interface only client libraries (or programs) need to be installed; the worker nodes are managed by their frontend node and do not need any grid services running directly on them.

9. Example IS Content ---------------------------------------------------
SE tbn03.nikhef.nl close to 2 CEs:
- tbn09.nikhef.nl:2119/jobmanager-pbs-qshort
- tbn09.nikhef.nl:2119/jobmanager-pbs-qlong
- VOs supported: alice, atlas, lhcb, biomedical, earthob, iteam (wpsix)
- gridftp on port 2811
- rfio on port 3147
- file
Mb of free space
Site: NIKHEF
CE tbn09.nikhef.nl:2119/jobmanager-pbs-qlong:
- PBS queue "qlong" with 96 hours time limit
- Software installed: ATLAS ALICE LHCb IDL-5.4 NIKHEF D0MCC-0.1-4
- There are 0 jobs running and 0 waiting, with 24 CPUs free
Close SE tbn03.nikhef.nl with mount point /flatfiles
CE tbn09.nikhef.nl:2119/jobmanager-pbs-qshort:
- PBS queue "qshort" with 240 minutes time limit
This is an example output from the hardware information available at the EDG Information Service:
At NIKHEF there is currently one CE (tbn09.nikhef.nl) with 24 WNs. The CE is configured to provide two pbs queues (a short and a long one) therefore the information is given two times. Moreover, you see the EDG application software installed and the current usage of the CE. The CE also has a “close” SE, i.e. an SE which is mounted to the CE.
Similar information is available for the SE available at NIKHEF (tbn03.nikhef.nl): You see that it is close to the CE, which virtual organizations (VOs) it supports and which access mechanisms are supported (gridftp, rfio, and file). Finally, the total amount of free storage is visible.

10. Outlook EDG Testbed 1.x contains basic services
Plan for a hierarchy of testbeds
Developers testbeds for individual WPs
Development testbed for integration (time shared between WPs)
Certification testbed for tests and certification (run by LCFG)
Application testbed to allow applications to do final tests
In this presentation we basically covered the system and service setup for an EDG Testbed version 1.x. In this version mainly basic services are provided (many of which are built upon Globus).

11. Further Information
EDG Testbed homepage: