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workflow jobs. As SZTAKI planned to operate a public gateway, they remapped all
jobs running on the local submitter (which may be disadvantageous from both per-
formance and security points of view in a public gateway) to run on the EDGe-
S@home desktop grid. Such remapping of workflow jobs does not interfere with the
ASM-based portlets that call the workflows. Therefore, no further programming or
modi
cation of the user interface was required. Finally, the workflows call BOINC
desktop grid applications that were downloaded and installed on the EDGeS@home
desktop grid server.
9.7 Conclusions
Internal and external repositories used by gUSE gateways enable and support
sharing and reusing applications, portlets, and workflows. As a result, the gateways
support two different levels of research cooperation: inside a community and among
communities belonging to different disciplines. Sharing and reuse of these artefacts
via repositories signi
cantly shortens the development time and improves the user
experience.
The current repositories have three limitations. First, they do not manage prov-
enance as expected and required by the research communities. Second, the workflow
repository does not have proper support for workflow execution on the cloud.
Workflow developers can upload virtual images of workflows as
files to the work-
flow repository but there is no GUI to manage them properly. Third, the portlet
repository does not enable automatic portlet export and import operations. These
limitations should be addressed by MTA SZTAKI and the University of West-
minster to further improve sharing portlets and workflows inside and among research
communities.
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