SourceForge.net: Project ogsa-dai

The OGSA-DAI project, a partner in OMII-UK, have released version 3.2 of their database access and integration software.

OGSA-DAI is an extensible framework for the access and management of distributed heterogeneous data resources – whether these be databases, files or other types of data – via web services. OGSA-DAI provides a workflow engine for the execution of workflows implementing data access, update, transformation, federation and delivery scenarios.

 The main features of OGSA-DAI 3.2 are as follows:

OGSA-DAI 3.2 now includes Distributed Query Processing (DQP).

• DQP allows the tables from multiple distributed relational databases to be queried, using SQL, as if there were multiple tables in a single database. These databases are exposed via OGSA-DAI servers.
• DQP was originally designed and developed by at the University of Manchester and the University of Newcastle upon Tyne. Previous versions of DQP were released as a separate product – OGSA-DQP.
• DQP has now been rewritten and is now simply an extension to OGSA-DAI. DQP’s functionality is now exposed as OGSA-DAI resources and activities and accessed via OGSA-DAI’s standard services. This greatly simplifies deployment and enables extensibility within a single framework.

Non-blocking data sinks that allow data pushed to OGSA-DAI from a client to be cached until it’s ready to be processed.

A new monitoring framework which tracks the data blocks produced and consumed by each activity in a workflow.

Support for relational database-specific meta-data extractors and mappers from JDBC column types to OGSA-DAI tuple types.

New security activities for passing client credentials through workflows and retrieving credentials from a Globus Delegation Service.

More efficient GridFTP activities.

A number of bugs have been fixed, components made more efficient or robust.

Unlike previous versions of OGSA-DAI, OGSA-DAI 3.2 only compiles under Java 1.5 and not Java 1.4. Apart from this, OGSA-DAI 3.2 is designed to be backwards compatible with OGSA-DAI 3.1 without the need for recompilation – data resource, activity and presentation layer APIs and service WSDLs remain the same.

OGSA-DAI is a free, open source, 100% Java product and is released under the Apache 2.0 licence. Downloads compatible with Apache Axis 1.4, Globus 4.0.8 and Globus 4.2.0, are available

To download OGSA-DAI 3.2 visit: http://sourceforge.net/projects/ogsa-dai/files/

OGSA-DAI 3.2’s user doc is at

http://sourceforge.net/apps/trac/ogsa-dai/wiki/UserDocumentation/ogsadai3.2

and the release notes at:

http://ogsa-dai.sourceforge.net/documentation/ogsadai3.2/ogsadai3.2-axis/Release.html

http://ogsa-dai.sourceforge.net/documentation/ogsadai3.2/ogsadai3.2-gt/Release.html

To find out more about OGSA-DAI visit our project WWW site at

http://www.ogsadai.org.uk

and our open source project site at

http://sourceforge.net/projects/ogsa-dai

The OGSA-DAI project – which involves both EPCC and NeSC – is funded by EPSRC through OMII-UK. For further information about OMII-UK visit

http://www.omii.ac.uk.

Cheers, mike

On behalf of the OGSA-DAI team.