San Diego Supercomputer Center National Partnership for Advanced Computational Infrastructure San Diego Supercomputer Center National Partnership for Advanced Computational Infrastructure University of Florida What is the Matrix? Arun swaran Jagatheesan San Diego Supercomputer Center DAKS Meeting, 11/03/2003 SDSC

San Diego Supercomputer Center National Partnership for Advanced Computational Infrastructure University of Florida 2 Credit / Acknowledgements Participants Allen Ding Lucas Gilbert Reena Mathew Erik Vandiekieft ( IBM) Xi Cynthia Sheng Well Wishers Reagan Moore & SRB Team Kim Baldridge YOU !!! Sponsors NSF GriPhyN, NSF SCEC, NPACI REU, NIH BIRN

San Diego Supercomputer Center National Partnership for Advanced Computational Infrastructure University of Florida 3 Talk Outline Workflow Requirements for Grid Workflow Data Grid Language Matrix as a WfMS Demonstrations XQuery (CDL) External Status Requests

San Diego Supercomputer Center National Partnership for Advanced Computational Infrastructure University of Florida 4 Workflow Automation of business process Whole or Part Documents/Information or tasks passed between participants Based on a set of procedural rules Scientific Computing Workflow Computational research process as pathways or pipelines Gather data, cleanse data, apply different combinations of transformations, simulations, visualization, publish in digital library, archive data, get Nobel prize (makes us also happy :-)

San Diego Supercomputer Center National Partnership for Advanced Computational Infrastructure University of Florida 5 Workflow Description Workflow description needed for processing Current standards BPEL4WS (Gaining Popularity) Business Process Execution Language for Web Services WSFL, XLANG; Merger of IBM, MS, … XPDL XML Process Definition Language From Workflow Management Coalition UML, WSCI,…

San Diego Supercomputer Center National Partnership for Advanced Computational Infrastructure University of Florida 6 Grid Workflow Granular Metadata Context-based workflow, with control-based constructs Query Dynamic rule (ECA rules) to update milestones Runtime Query on status of other activities XQuery subset - Uniform query for data and process Looping Scientific Computing more looping structures Interest in execution of each iteration and change of state No support from existing standards

San Diego Supercomputer Center National Partnership for Advanced Computational Infrastructure University of Florida 7 Grid Workflow Description (Addl. Req.) Facilitate modeling using a GUI as a workflow graph Describe rules that can be updated dynamically Embedded ECA-like rules within workflow description Describe looping structures - where the state of each iteration is visible to applications Dynamic query description for inter and intra-process coordination during workflow Context based workflow (not purely control based) Support import and export of definitions to be executed in P2P environment of workflow systems (and also support composition of services)

San Diego Supercomputer Center National Partnership for Advanced Computational Infrastructure University of Florida 8 Data Grid Language XML based asynchronous protocol Describe Workflow control structures (Sequence, Parallel Split,..) Describe data sets, collections, datagrid operations,... Access and manage data grids, data flow pipelines Query on data resource (based on W3C XQuery subset) Describe Rules and Context based Grid Workflow * Query on Process meta-data, state * Implementation Reference Implementation by SDSC Matrix Project * Being Designed/developed as of the presentation date

San Diego Supercomputer Center National Partnership for Advanced Computational Infrastructure University of Florida 9 Data Grid Request (DReq) Datagrid Request Asynchronous requests for data/process-flow in datagrids Requests are either a Transaction or a Status Query Each Transaction consists of one or more Flows Each Flow consists of one ore more datagrid operations Datagrid operation = data transformation or data query A flow can be executed sequential or parallel

San Diego Supercomputer Center National Partnership for Advanced Computational Infrastructure University of Florida 10 Data Grid Request

San Diego Supercomputer Center National Partnership for Advanced Computational Infrastructure University of Florida 11 Data Grid Response Datagrid Response Either Transaction Acknowledgement or Status Response Status Response contains the results of a Transaction Response could be received at any granular level Status response is used for coordination of flows and inter-process notifications

San Diego Supercomputer Center National Partnership for Advanced Computational Infrastructure University of Florida 12 Data Grid Response (DRes)

San Diego Supercomputer Center National Partnership for Advanced Computational Infrastructure University of Florida 13 Grid Workflow Process I End User Workflow Description Data Grid Language

San Diego Supercomputer Center National Partnership for Advanced Computational Infrastructure University of Florida 14 Grid Workflow Process II Abstract Workflow Data Grid Language Concrete Workflow Planner

San Diego Supercomputer Center National Partnership for Advanced Computational Infrastructure University of Florida 15 Grid Workflow Process III Concrete Workflow Export Workflow to Matrix P2P Grid Workflow Processor

San Diego Supercomputer Center National Partnership for Advanced Computational Infrastructure University of Florida 16 Matrix Server Acts as a Peer in WfMS P2P System * Processes Data Grid Requests Can maintain state an manage process steps Can invoke SRB data grid processes, OGSA- Services, WSDL Services (OGSA Threads to be implemented) Implemented as an Open-source Project * Being Designed/developed as of the presentation date

San Diego Supercomputer Center National Partnership for Advanced Computational Infrastructure University of Florida 17 Implementation Status Data Grid Language Schema for basic workflow constructs, Data Grid Operations Matrix agents for executing data grid requests Basic process pipeline management Data Grid Language: Rules, Embedded query, OGSA operations to be added Matrix: P2P, export/sharing of workflow to be added

San Diego Supercomputer Center National Partnership for Advanced Computational Infrastructure University of Florida 18 SDSC Matrix Architecture Matrix Agent Abstraction In Memory StoreJDBC OGSA Agent WSDL Agent Persistence (Store) Abstraction Termination Handler Matrix Data Grid Request Processor Transaction Handler Status Query Handler Data flow pipeline Meta data Manager JMS Messaging System JAXM Wrapper OGSARPC-Style for SOAP SOAP Service Wrapper Abstraction Flow Handler and Execution Manager Pipeline Query Processor XQuery Processor Event Publish Subscribe, Notification SRB Agents Other Data Services

San Diego Supercomputer Center National Partnership for Advanced Computational Infrastructure University of Florida 19 Conclusion Data Grid Language Grid Workflow Description Basic Stuff or foundation ready Solid Design to handle more complex stuff Workflow Modeling not investigated (like Ptolemy?) Matrix Server Implementation Create, Query, Manage Grid Workflows OGSA, Rules, P2P to be implemented More Support will expedite R&D

San Diego Supercomputer Center National Partnership for Advanced Computational Infrastructure University of Florida 20 Demos ? He is trying to escape. Where are the Demos?