CERN Analysis Preservation & REANA Workshop

Agenda

See the official indico page here.
Date of the workshop: 20th of June 2018

Summary

The presentations, demos and discussions showcased strategies and developments regarding preservation and reusable research. Whilst the LHC experiments have varying approaches, e.g. in terms of automation and knowledge preservation, the overall goals and ambitions appeared congruent with the CAP and REANA service development.

Further work

ALICE:

• capture and preservation of Lego trains
• enable preservation of analysis macros (typically fitting and plotting)
• take next steps reg. internal discussions

ATLAS:

• enable automated links with GLANCE and respective Gitlab repositories
• collect more analysis examples

CMS:

• bring the demonstrations and discussions to the CMS groups
• find an adoption scheme for analysis preservation

LHCb:

• collect more analysis examples
• agree on an adoption scheme and next steps

The presentations by the representatives of the LHC collaborations are available on Indico.

Progress/feedback

Regarding the demos, the following progress or feedback should be noted:

The CAP form

• CAP uses CERN OAuth and standard e-group setup
• Connection to several collaborations' databases has been implemented to support the submission process by providing autocomplete functionality
• Analysis sharing has been enabled with flexible permissions to enable collaborative editing/reading of an analysis
• File and repository upload has been implemented
• The analysis schemas (JSON) are flexible to handle a wide range of different analyses

CAP search

• Intelligent search has been implemented to look for any kind of metadata or files that have been submitted to CAP (examples vary from specific datasets to data P_T cuts, etc.)

CAP-client

• A CAP-client has been developed to make analysis submission as easy as possible -> Its functionality can be extended as needed

REANA

• A reana-client has been developed to support the communication with the service -> Support for multiple computational workflows is needed

CAP-REANA bridge

• Prototype of the link between the services has been demonstrated
• A selection of preserved analyses can now be instantiated through the “Rerun on REANA” button on the CAP interface
• Parameters can be selected when starting the analysis