Collaborative services are essential for any experiment.
They help to integrate global virtual communities by allowing to share
and exchange relevant information among members.
Typical examples are public and internal web pages, wikis, mailing
list services, issue tracking systems, and services for meeting
organizations and documents.
After reviewing their collaborative services with respect to security,
reliability, availability, and scalability, the Belle II collaboration
decided in 2016 to migrate services and tools into the existing IT
infrastructure at DESY. So far missing services were added and
workflows adapted. As a new development, a membership management
system which serves the needs of a global collaboration as of to-date
with 968 scientists of more than 113 institutions in 25 countries all
around the world, was put into operation in the beginning of 2018.
Almost all essential service of a living collaboration were subject to
modifications, some of them with major or complete changes. Moreover,
an already productive collaboration had to give up accustomed systems
and adopt to new ones with new look-and-feels and more restrictive
In the contribution to CHEP2019 we will briefly review the planning
and realization of the migration process and thoroughly discuss
experiences which we gained while supporting the daily work of the
Belle II collaboration.
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