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►A new application is now available. This application is a terminal which allows you to get access to the gLite command lines or to ExpressLane without having to start Desktop Fusion. The implementation is based on the Gate One HTML5 terminal and, therefore, you need to have a modern web browser in order to be able to use it.


The first N4U Interactive Tutorial in the form of a video is now online


► Download the N4U Flyer here!


► The first N4U Newsletter June 2012 is now online!


►The ADRD (Alzheimer's Disease and Related Disorders) Conclusions Report from the outGRID - ITU workshop held in Geneva on 21st February is now available, presenting the discussion on current context on ADRD research and funding, current problems and challenges, conclusions and follow-up actions. You can find the general workshop report here.

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N4U Persistency Service to Store Information



N4U Persistency Service to Index Metadata and Store Pipeline Execution Outcomes




The N4U Persistency Service complements the N4U Analysis Base acting as a wrapper for storing information into the Analysis Base and retrieving such information. The Persistency Service provides appropriate interfaces for storing the meta-data of datasets (e.g. ADNI datasets) into the Analysis Base such that those datasets, which are actually stored in their entirety on the N4U Grid infrastructure (or other similar repositories), become indexed in the Analysis Base. This index can then be used by other services for allowing users to define their analysis and carry out relevant queries using these datasets. For the N4U Persistency Service Tutorial, click here.


The Persistency Service also allows the storage of pipeline execution outcomes e.g. one carried out by a user. Similarly, user-annotated data or knowledge-derived by the user through analysis/data annotation are also stored in the Analysis Base through interfaces provided by the Persistency Service. The following diagram illustrates a functional view of the Persistency Service.


It is not expected that the user will interact directly with the Persistency Service; rather this service will act as a facilitator between other services in the system (e.g. Querying Service, Analysis Services) and the Analysis Base.