1. MySpace: Personalized Work Space in AstroGrid Catherine Ling Qin 26 th Nov 2003

2. 26/Nov/2003IVOA Small Projects, BeiJing Background Vast amount of Data Vast amount of Data Sharing Data (Limited Storage for each astronomer) Sharing Data (Limited Storage for each astronomer) Distributed Across The Globe Distributed Across The Globe

3. 26/Nov/2003IVOA Small Projects, BeiJing Overview MySpace is a component of AstroGrid MySpace is a component of AstroGrid A system for accessing astronomical archives which is being developed in the UK A system for accessing astronomical archives which is being developed in the UK MySpace provides AstroGrid users with scratch space for storing temporary/permanent datasets, typically the results of queries submitted to large databases, and other transient files. MySpace provides AstroGrid users with scratch space for storing temporary/permanent datasets, typically the results of queries submitted to large databases, and other transient files.

4. 26/Nov/2003IVOA Small Projects, BeiJing Design Open-source software products Open-source software products Distributed, collaborative and centrally- controlled data storage/processing system Distributed, collaborative and centrally- controlled data storage/processing system Simple and user-friendly interface Simple and user-friendly interface Easy Installation (Plug and Play). Eventually be deployed at institutions around the globe. Easy Installation (Plug and Play). Eventually be deployed at institutions around the globe.

5. 26/Nov/2003IVOA Small Projects, BeiJing MySpace Components MySpaceManager MySpaceManager   Invoked by users to access or manipulate data sources in MySpace systems. It incorporates a registry comprising the Meta Data describing the data sources in the MySpace system. Typically there will be one MySpace Manager per Community.

6. 26/Nov/2003IVOA Small Projects, BeiJing MySpace Components (Continue) MySpaceServer MySpaceServer   Act like repositories and are where the Data Sources are kept. Cache Server -- Stores Transient Data Cache Server -- Stores Transient Data Community Server – Stores Data Sources within the Community. Community Server – Stores Data Sources within the Community.

7. 26/Nov/2003IVOA Small Projects, BeiJing MySpace Components (Continue) MySpace Explorer MySpace Explorer  Easy to use.  Web Based. The User Interface displayed within a web browser that allows astronomers to interactively browse/edit their data sources within MySpace Systems.  MySpace Explorer displays a simple and intuitive representation of hierarchical data sources. The notional hierarchy of containers does not correspond to the actual directory structure on MySpace Servers. Rather, the structure is stored and maintained by MySpace manager

8. 26/Nov/2003IVOA Small Projects, BeiJing MySpace Components (Continue) MySpace Explorer MySpace Explorer

9. 26/Nov/2003IVOA Small Projects, BeiJing MySpace Components (Continue) MySpace Manager MySpace Manager MySpace Server MySpace Server Cache Server Cache Server Community Server Community Server MySpaceManager MySpaceServer Internet Data Transfer between servers DatasetAccess Collocated data transfer DatasetAccess Collocated data transfer DatasetAccess Collocated data transfer Leicester Community BeiJing Community

10. 26/Nov/2003IVOA Small Projects, BeiJing Technology Choices Web services Web services Java Java Cocoon (MVC) Cocoon (MVC)

11. 26/Nov/2003IVOA Small Projects, BeiJing Current Implementation and Supported Functionalities Create/Delete File or Container Create/Delete File or Container Upload/Download File Upload/Download File Copy/Move File Copy/Move File Look up details of a single file Look up details of a single file Look up details of all files matching an optionally wild-carded file name. Look up details of all files matching an optionally wild-carded file name. Extend Lease Extend Lease A rudimentary MySpace Explorer. A rudimentary MySpace Explorer.

12. 26/Nov/2003IVOA Small Projects, BeiJing Enhancements and Open Issues File Storing System Combined with DBMS Database. File Storing System Combined with DBMS Database. Access Control Access Control File Transferring Protocols (Http/FTP/GridFTP) File Transferring Protocols (Http/FTP/GridFTP) In order that free access to (sometimes huge) distributed data sources does not cause network resources to become overloaded, we would need to investigate the possibility of smart algorithms for controlled replication of (parts of) data sources. In order that free access to (sometimes huge) distributed data sources does not cause network resources to become overloaded, we would need to investigate the possibility of smart algorithms for controlled replication of (parts of) data sources.