Chinese activity on inter-Grid test between SRB and SIG
Guoqing Li, RSGS/NRSCC & Carol Song, RCAC/Purdue UniversityPresented at WGISS-23, Hanoi23 May 2007
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Contents
BackgroundCooperation archtiture from the view of Inter-GridExperiment and ResultPreliminary conclusion
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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
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Mode II
Node
Node
Node
Node
GridRegister
Grid A
Node
resource
Node
Node
GridRegister
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.
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Mode III
Node
Node
Node
Node
GridRegister
Grid A
Node
resource
Node
Node
GridRegister
Grid B
This resource is a special one. Two Grids can cooperate with the service nodes on this resource. Broker mechanism is active.
broker
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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
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Data Nodes (resource)
SIG Container
Query Service(eWCS)
Access Service(eWFS)
WMS Service
Uniform interface
Uniform interface
Uniform interface
Adaptor Adaptor AdaptorDevelopTools
LANOperateSQL+API
Daemon
How does SIG organize its data resource?
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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
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Cooperation archtiture from the view of Inter-Grid
SIG SRB
SRB
SRB
SRB
SIG
SIG
SIG
MCATSIG DataRegister
SIG
SRB
SRB
SIG
InterGrid Broker
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From SRB to SIG
SIGBroker
SRBData Source
SRBData Source
SIG Data Register
SIGData Source
MCAT
User
Portal
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Service InterfaceService Interface
XML query sentenceXML query sentence
Adaptor
SRB database B
.propOf BMeta Query
Query Engine
Sql sentence
SIG Adapter ASRB Adapter B
SIG database A
Example: the implementation of SRB2SIG data query service
.propOf A
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From SIG to SRB
SIGData Source
SRB
SIGData Source
SRB MCAT
SRBData Source
SIG data Register
SRB Client
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The implementation of SRB data query service
SRB SERVER SRB SERVER
Adapter
sig database
MCATSRB core
SIG Adapter
File SystemsUnix, NT,Mac OSX
DatabasesDB2, Oracle
Sybase
ArchivesHPSS, ADSM,UniTree, DMF
SIGSIG
SRB ClientSRB Client
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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.
•SRBSIG ( ok )•SIGSRB ( under going )
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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.
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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