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WP6 Testbeds and Services. GridPP Middleware Workshop 4 th -5 th March 2004 Steve Traylen. Outline. Testbed History Application Testbed Development Testbed WP6 Services E.g., CVS, AutoBuild LCFG Installation of Middleware Support. Early Testbed History.

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Wp6 testbeds and services

WP6 Testbedsand Services

GridPP Middleware Workshop4th-5th March 2004

Steve Traylen


Outline
Outline

  • Testbed History

    • Application Testbed

    • Development Testbed

  • WP6 Services

    • E.g., CVS, AutoBuild

    • LCFG Installation of Middleware

  • Support


Early testbed history
Early Testbed History

  • In 2000 it was all based on an RPM distribution of Globus – Testbed 0 (McNab).

  • These were still used through testbed 1.

  • Later LCFG arrived and this allowed a release to be completely specified.

  • Software and configuration could be modified which was critical for an incremental distributed development cycle.


Testbed history
Testbed History

  • After release 1.1.4 the release cycle did not change much which is good.

  • The testbed could cope with many, even multiple upgrades within a day. Important for typos.


Application testbed
Application Testbed

  • About 22 sites in 8 countries.

  • 6 of these sites are in the UK.

  • Currently South, London and North grid all represented within EDG. (Scot has been.)

  • The UK maintained many core services such as R-GMA registry and RLS servers.

    • In fact EDG in the UK would survive without the rest of Europe.


Development testbed
Development Testbed

  • UK has maintained a core site within the development process.

  • Essential as an early learning ground for the new software.

  • A presence within development of EGEE and LCG now continues.


Wp6 services
WP6 Services.

  • The UK not directly involved but this is a big influence on middleware development.

  • CVS.

    • A central CVS repository was always very sensible.

  • Bugzilla worked very well.

    • A good way to contact developers and prioritise but not forget requests and bugs.

    • 2800 bugs, 87% resolved.


Autobuild
Autobuild

  • Took longer than ideal to mature.

    • The build queue was missing for ages.

    • Developers learning automake/autoconf took some time.

    • In the end it proved very valuable.

  • At times this created what appeared to be a huge bottle neck – but only because it was the final stage.

  • This technology now continues into LCG/EGEE.

  • Suggestions

    • Try and use community projects that are mature from day one.


Lcfg installation of nodes
LCFG Installation of Nodes

  • Auto configuration was essential to developing in a distributed deployment.

    • Avoided some trivial configuration errors.

  • However now it is almost a requirement to use LCFG for any EDG software.

  • Suggestion.

    • Configuration of middleware needs scrutiny earlier. This is the API the sysadmin or configuration system has to work with after all.


Support
Support

  • In the UK the [email protected] worked and continues to work well.

    • Used by sysadmins and UK grid users.

  • The UK having people very involved with EDG development was ideal for this.

    • LCFG hides the inner workings of configuration.

  • Better documentation and short cookbooks required for sysadmins and end users to avoid the need for this.


Conclusions
Conclusions

  • The UK was always active with in the application and development testbeds of EDG.

  • This puts many sites in an excellent position to join LCG in coming months.

  • Many UK members were involved with integration process, loose cannons , developers, sysadmins…

  • EDG currently comes as a huge bundle.

    • This is good for fast development but does not match reality of resources.


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