andrew mcnab - manchester hep - 15 february 2002 testbed release in the uk edg testbed 1 gridpp...

Andrew McNab - Manchester HEP - 15 February 2002

Testbed Release in the UK

• EDG Testbed 1• GridPP sources of information• GridPP VO• GIIS and Resource Broker• Installation• UK Deployment


EDG Testbed 1• Integration by ~20 people from EDG middleware WP’s and WP6.

• Intensive integration periods at CERN during October and December

• See http://marianne.in2p3.fr/ for official documents– especially 29th October and 10th December presentations, and User and

Installation Guides

• Everything taking longer than planned

• Rollout ongoing (currently CERN, CNAF, Manchester, RAL, Lyon, NIKHEF, ...) but TB1 still a moving target

• Version v1.0.0 out end of January as a snapshot of what was being used in Dec/Jan

• V1.1.0 (still) imminent <== this is the version to be used in EDG demos and this is what we need to get up and running.

• Not yet something that can be done from the documentation alone.


GridPP sources of information

• http://www.gridpp.ac.uk/tb-support/

– collect links to key documents

• eg install guide at http://marianne.in2p3.fr/

– provide GridPP Howtos to fill in gaps

– links to other TB1 resources: VO, tb-support list etc

• [email protected]

– intended for exchanging information between people trying to set up a Testbed site

– (please ask questions on the list, so other people can help and/or benefit from the responses.)


GridPP VO Service

• EDG WP6 defines a standard way to publish lists of certificate names via LDAP to define authorisation groups

• WP6 also provides mkgridmap, a tool to construct a site’s grid-mapfile from one or more VO authorisation servers.

• Now have a GridPP VO service at vo.gridpp.ac.uk– this exports website groups via LDAP

– eg group “testbed” becomes ou=testbed,dc=gridpp,dc=ac,dc=uk

– format is same as WP6, so can access GridPP VO with mkgridmap

• Since authorisation groups are defined via website, can easily add and manage additional groups

• BaBar VO also hosted on the server (added via SLAC accounts)

• However, most Grid developers in an LHC experiment should be listed by central EDG VO’s at NIKHEF.


GIIS and Resource Broker• a.k.a “how do I get on the list of sites and receive jobs?”

• GRIS - local LDAP server on, say, a Computing Element (= site gateway)

• GIIS - indexing LDAP server, which receives information from GRIS’s

• Currently use Resource Broker at CERN - it uses local GIIS to get list of TB1 sites

• For sites to receive jobs, they need to be registered with the GIIS used by the users’ RB.

• GridPP and BaBar RB’s being set up at Imperial.

• BaBar GIIS at Bristol

• GridPP GIIS to be at RAL


Installation• Edinburgh’s LCFG with WP4 modifications is official EDG procedure

• However, some concerns about the effort to set this up and rollout new versions, esp at smaller institutes.

• For December, produced a kickstart based installation

• But (1) configuration via LCFG now specified and we want to use this

• But (2) the large number of packages now in v1.1.x breaks RedHat anaconda/kickstart

• For v1.1.0 will support LCFG-based installations

– trying kickstart-like installation of initial LCFG server to answer concerns of small sites

– once a local LCFG is up and running, installation of CE, SE etc is no more difficult than kickstart installation (3.5”disk + wait 7mins)

– This should also make it easier to rollout new releases quickly


UK Deployment

• Start with UK WP6 people (+ other experts)

• Use http://www.gridpp.ac.uk/tb-support/ and [email protected] to get second round of sites up

• Ready for wider deployment when installation is practical just from documentation

• Eventually maintain production and development testbeds

– mapped onto EDG/WP6 pro and dev testbeds to some extent

– and coexisting with other production grids (eg CMS and BaBar MC generation.)


Summary

• Testbed release(s) stabilising• EDG-provided documentation improving• GridPP support resources exist:

– www.gridpp.ac.uk

– [email protected]

– vo.gridpp.ac.uk

• GridPP GIIS and RB being provided• Installation procedure being simplified


Manchester Testbed Status• 6 dedicated machines (6*1GHz) for use as Testbed 1 elements

(CE etc) and LCFG server(s).– One running permanently as CE in current TB1 and accessible via

Resource Broker at CERN since December. But no registered SE yet.

• 7th machine hosts www.gridpp.ac.uk, vo.gridpp.ac.uk, and a 0.5TB disk array.

• 8th machine used for building and testing EDG Globus RPM’s.

• 9th machine running Globus 1.1.3 and hosts a 0.4TB array.

• BaBar PC farm is configured to use pool accounts and is accessible locally via PBS– although have run test jobs via Testbed CE, we don’t have this set up

permanently at this stage.

andrew mcnab - manchester hep - 15 february 2002 testbed release in the uk edg testbed 1 gridpp...

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