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<div align="justify"><b>Problem statement:</b> OGSA-DAI middleware allows data resources to be federated and&#13; accessed via web services on the web or within grids or clouds. It provides a client API for writing&#13; programs that access the exposed databases. Migrating existing applications to the new technology and&#13; using a new API to access the data of DBMS with BLOB is difficult and discouraging. A JDBC Driver&#13; is a much convenient alternative to existing mechanism and provides an extension to OGSA-DAI&#13; middleware and allows applications to use databases exposed in a grid through the OGSA-DAI 3.0.&#13; However, the driver does not support Binary Large Objects (BLOB). <b>Approach:</b> The driver is&#13; enhanced to support BLOB using the OGSA-DAI Client API. It transforms the JDBC calls into an&#13; OGSA-DAI workflow request and sends it to the server using Web Services (WS). The client API of&#13; OGSA-DAI uses activities that are connected to form a workflow and executed using a pipeline. This&#13; workflow mechanism is embedded into the driver. The WS container dispatches the request to the&#13; OGSA-DAI middleware for processing and the result is then transformed back to an instance of&#13; ResultSet implementation using the OGSA-DAI Client API, before it is returned to the user. <b>Results:&#13; </b>Test on handling of BLOBs (images, flash files and videos) ranging from size 1 KB to size 2 GB were&#13; carried out on Oracle, MySQL and PostgreSQL databases using our enhanced JDBC driver and it&#13; performed well. <b>Conclusion: </b>The enhanced JDBC driver now can offer users, with no experience in&#13; Grid computing specifically on OGSA-DAI, the possibility to give their applications the ability to&#13; access databases exposed on the grid with minimal effort.</div

Extending Binary Large Object Support to Open Grid Services Architecture-Data Access and Integration Middleware Client Toolkit