Information Technology Reference
In-Depth Information
17.3.3.3 Provenance Explorer
The provenance API is accessible via a user interface, as shown in Fig. 17.5 . Users
can search for a run of interest by submitting metadata queries on value ranges. The
users can examine the processes and the produced data. If any
file has been gen-
erated this will be linked and available for visualization or download. The interface
also offers an interactive navigation across all of the data dependencies for and from
a certain product. It is important to notice how the data dependency trace of
Fig. 17.5 provides more insight about the actual workflow logic, compared with the
high-level WS-PGRADE speci
cation, shown in Fig. 17.4 .
17.3.3.4 VERCE Data Management
User Document Store : The VERCE Science Gateway provides users with a way to
upload andmanage their own con
files and input datasets by interfacing with
the document store provided by the Liferay portal. The adoption of the Liferay version
currently supported by WS-PGRADE, imposed some limitations on the enactment of
some of the document store capabilities. The support for more up-to-date versions
of Liferay will allow the implementation of new features (i.e.,
guration
file sharing among users
and groups) that will foster new collaborative interactions.
Work fl ow Data Products : As previously mentioned, all of the data produced by
the workflows are shipped at the end of the computation to an external data store.
The data store consists of a federation of iRODS instances, internal to the VERCE
consortium, which supports authorization and authentication, data replication, and
Fig. 17.5 Provenance explorer GUI: the workflow ' s provenance information can be explored in a
fully interactive fashion, allowing the visualization and the download of the data produced. It
provides, moreover, a navigable graphical representation of the data derivation graph. From right
to left , the dependencies from the wavePlot module to inputGen are made explicit and browsable
Search WWH ::




Custom Search