Chinese activity on inter-Grid test between SRB and SIG Guoqing Li, RSGS/NRSCC & Carol Song, RCAC/Purdue University Presented at WGISS-23, Hanoi 23 May 2007

2 Contents Background Cooperation archtiture from the view of Inter-Grid Experiment and Result Preliminary conclusion

3 Collaboration Mode There are three modes on grid data resources collaboration. Mode I: Making one resource node cooperated with another node Mode II Making one node of Grid A as a node of Grid B Mode III Making Grid A as a node of Grid B

4 Mode I node Cooperation Mechanism Grid One of the mechanism is Grid

5 Mode II Node Grid Register Grid A Node resource Node Grid Register Grid B This resource is not a special one. Both Grid A and Grid B cannot cooperate each other with the two nodes of this resource.

6 Mode III Node Grid Register Grid A Node resource Node Grid Register Grid B This resource is a special one. Two Grids can cooperate with the service nodes on this resource. Broker mechanism is active. broker

7 Background of SRB/SIG Target of the research (Why Inter-Grid?) To connect the EO data resources between two independent grid systems. To find the way of inter-grid operation. Participants in this case RCAC (Rosen Center for Advanced Computing) of Purdue university RSGS/NRSCC

8 GIG NCSA TACC UC NCAR SDSCORNL Purdue PSC IU TeraGrid RSGS Tsinghua CAF SIG InterGrid

9 RCAC Data services resource

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11 SIG Data services resource

12 Data Nodes (resource) SIG Container Query Service (eWCS) Access Service (eWFS) WMS Service Uniform interface Uniform interface Uniform interface Adaptor Develop Tools LAN Operate SQL+API Daemon How does SIG organize its data resource?

13 Principles Gird user of both sides can find and access the whole data resources. Keeping the original resource organization structure. (Black Box) For most data resources, Need not to be registered into second Grid Need not to add new service interface for second Grid

14 Cooperation archtiture from the view of Inter-Grid SIG SRB SIG MCAT SIG Data Register SIG SRB SIG InterGrid Broker

15 From SRB to SIG SIG Broker SRB Data Source SRB Data Source SIG Data Register SIG Data Source MCAT User Portal

16 Service Interface XML query sentence Adaptor SRB database B.prop Of B Meta Query Query Engine Sql sentence SIG Adapter A SRB Adapter B SIG database A Example: the implementation of SRB2SIG data query service.prop Of A

17 From SIG to SRB SIG Data Source SRB SIG Data Source SRB MCAT SRB Data Source SIG data Register SRB Client

18 The implementation of SRB data query service SRB SERVER Adapter sig database MCAT SRB core SIG Adapter File Systems Unix, NT,Mac OSX Databases DB2, Oracle Sybase Archives HPSS, ADSM, UniTree, DMF SIG SRB Client

19 Experiment and Result At present, we have implemented the broker from SRB to SIG service It means that with SIG Portal, the user can search and access the data stored in SRB data source. With the help of SRB MCAT mechanism, there is only one SRB2SIG broker service should be set within the certain SRB domain. All data in this domain will be available for SIG user. SRB  SIG （ ok ） SIG  SRB （ under going ）

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25 Following works Negotiating with Purdue about the registering of SRB2SIG broker into Purdue’s SRB domain, with their experiment partner － certification control. Working with Purdue’s SRB experts to implement SIG2SRB broker, which work needs the knowledge of SRB intramural technology. Bringing out a web-service based framework of inter- grid broker mechanism. Applying them in the following project to check its adapting capability.

26 Other Works The inter-grid between ESA G-POD and China SIG is ongoing. This work is also located at the level of EUChinaGrid. There steps (data level/ task level/ application level) Now at data level …… A report will be given at WGISS-24 New Chinese EO Grid Plan National wide EO data grid and processing grid Not very clear Also will be reported at next WGISS meeting

27 Thank you.