1 / 7

An Overview of OGSA-DAI

An Overview of OGSA-DAI. Kostas Tourlas tourlas@nesc.ac.uk. Goals for OGSA-DAI. Aim to deliver application mechanisms that: Meet the data requirements of Grid applications Functionality, performance and reliability Reduce development cost of data-centric Grid applications

selma
Télécharger la présentation

An Overview of OGSA-DAI

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. An Overview ofOGSA-DAI Kostas Tourlas tourlas@nesc.ac.uk

  2. Goals for OGSA-DAI • Aim to deliver application mechanisms that: • Meet the data requirements of Grid applications • Functionality, performance and reliability • Reduce development cost of data-centric Grid applications • Provide consistent interfaces to data resources • Acceptable and supportable by database providers • Trustable, imposed demand is acceptable, etc. • Provide a standard framework that satisfies standard requirements • A base for developing higher-level services • Data federation • Distributed query processing • Data mining • Data visualisation ReSC Access Grid meeting, May 2005

  3. Core features of OGSA-DAI • An extensible framework for building applications • Supports relational, xml and some files • MySQL, Oracle, DB2, SQL Server, Postgres, XIndice, CSV, EMBL • Supports various delivery options • SOAP, FTP, GridFTP, HTTP, files, email, inter-service • Supports various transforms • XSLT, ZIP, GZip • Supports message level security using X509 • Client Toolkit library for application developers • Comprehensive documentation and tutorials • Fourth production release coming up: • OGSI (GT3), WS-I (OMII) and WS-RF (GT4) flavours • Highly extensible • Strength is in customising out-of-box features ReSC Access Grid meeting, May 2005

  4. Why Use OGSA-DAI • Provides common access view • Regardless of underlying infrastructure • Exposed through Java API or XML • Integrates well with other Grid software • OGSA, WSRF and OMII compliant • Flexibility • OGSA-DAI’s major selling point! • Extensible activity framework • Won’t tie you to storage infrastructure ReSC Access Grid meeting, May 2005

  5. Why You Might Not Want To Use OGSA-DAI • OGSA-DAI slower than direct connection methods • E.g., compared to JDBC • This should improve with time • Scalability issues • Mostly but not completely known • Depend on type of use (e.g. delivery mechanism) • Only planning to use one type of data resource • and don’t care about interoperability with other Grid software • OGSA-DAI an overkill in that case ReSC Access Grid meeting, May 2005

  6. Considerations checklist • Grid-enabled solution required? • Web-service interfaces desirable? • Data access by apps as well as individuals • FTP/GridFTP delivery acceptable? • Mitigates against SOAP limitations • Workflow control required? • More than just single, isolated queries • Diverse data resources? • E.g., databases & flat files • Format translations & transforms required? • E.g., XML to SQL, or between file formats • Java development effort available? • A few weeks, with support from OGSA-DAI team ReSC Access Grid meeting, May 2005

  7. Further info • The OGSA-DAI Project Site: • http://www.ogsadai.org.uk • The DAIS-WG site: • http://forge.gridforum.org/projects/dais-wg/ • OGSA-DAI Users Mailing list • users@ogsadai.org.uk • General discussion on grid DAI matters • Formal support for OGSA-DAI releases • http://www.ogsadai.org.uk/support • support@ogsadai.org.uk • OGSA-DAI training courses ReSC Access Grid meeting, May 2005

More Related