ibm software group ® design thoughts for jdsl 2.0 version 0.2

IBM Software Group ® Design Thoughts for JDSL 2.0 Version 0.2

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IBM Software Group

Design Thoughts for JDSL 2.0

Version 0.2

IBM Software Group | Tivoli software

Actors related to Job Submission

Developer Builds the “programs” that can be executed Is typically a human

Submitter Requests the “programs” execution and manage their lifecycle Is typically a program, it could a be human

Administrator Manages the scheduling environment Defines policies for governing “programs” execution Is typically a human

Operator Monitors and controls the job execution Is typically a human

Page 3: IBM Software Group ® Design Thoughts for JDSL 2.0 Version 0.2

IBM Software Group | Tivoli software

Main Use Cases related to Job Submission

Developer Creates Job Definitions

Submitter Submits jobs for execution using Job Definitions

• Either specify the Job Definition inline• Or reference to a Job Definition document

Manages the lifecycle of the submitted jobs• Monitors status• Get output• Terminate• Etc.

Administrator Manages resources Manages infrastructure Defines scheduling policies

Operator Manages all submitted jobs

Page 4: IBM Software Group ® Design Thoughts for JDSL 2.0 Version 0.2

IBM Software Group | Tivoli software

Reuse of Job Definition

Job submission involves 2 types of entities: Job definition entity

• Can be reused across multiple Job submissions

• Defines:− What “program” has to be executed− Requirements for the program execution− Required scheduling parameters

Submission entity

• Parameters specific to a single submission instance

• It can embed a Job definition entity or refer to an external one

Support for parameters and variables Variable expressions

Page 5: IBM Software Group ® Design Thoughts for JDSL 2.0 Version 0.2

IBM Software Group | Tivoli software

Security

Use WS-* standards for specifying security information WS-Security for Job Execution credential

Job Execution Credential should be specified in the main JSDL sections

Dependencies with other JSDL resource constructs (i.e. home filesystem)

Support for credential mapping

Support for applying policies based on credentials (i.e. authorization)

Page 6: IBM Software Group ® Design Thoughts for JDSL 2.0 Version 0.2

IBM Software Group | Tivoli software

Resource requirement

Specification based on resource meta-model No implicit assumption about specific resource types and

attributes

Express requirement on resource characteristics and relationships between resources

Express allocation of resources

Express resource preferences

Express optimization criteria

Page 7: IBM Software Group ® Design Thoughts for JDSL 2.0 Version 0.2

IBM Software Group | Tivoli software

Job Choreography

Complex Job choreography is outside of the JSDL scope of Simple multi-step support

Focused on the execution of multiple steps using the same set of resources

Support for simple sequential flow or parallel type of flow For more complex flows, integration with WS-BPEL will allow for inter-job

choreography

Enable to integrate with WS-BPEL for manage the choreography of multiple jobs

Evaluate extension to WS-BPEL required for Job choreography scenarios

• Support Job activity that specify JSDL submission artifact Integration of JSDL with WS-BPEL variable management support

• Variable references can be used in Job Definition entity elements and attributes

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