1. Proposed JSDL Extension: Parameter Sweeps
Architecture and Examples
Michel Drescher, Fujitsu
Ali Anjomshoaa, EPCC
OGF19, Chapel Hill

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OGF Intellectual Property Policies are adapted from the IETF Intellectual Property Policies that support the Internet Standards Process. 2

3. Contents Purpose Scenarios Use Cases Summary
From Use Case to XML Schema
XML Schema: Building Blocks
Examples 3

4. Purpose
The purpose of this work is to provide a normative extension to the JSDL 1.x specification
This normative extension will provide users of JSDL with a standard way to specify their requirements for “parameter sweeps” using a single JSDL template document 4

5. Scenario – Current State
<submit>
...
<instantiate>
...
Client with
Internal Parameter
Sweep Job
Generation
Capability
Parameter
Sweep
Activity
Set
Job Container
JSDL
Template
JSDL
Template
JSDL
Template
BES ? 5

6. Scenario – Parameter Sweep Enabled JSDL Client
Default
JSDL
Template
Param
Sweep
Doc
<submit>
...
<instantiate>
...
Parameter
Sweep
Activity
Set
<submit>
Job Container
JSDL
Template
Client
JSDL
Template
JSDL
Template
BES ? 6

7. Scenario – Parameter Sweep Enabled Job Container
Default
JSDL
Template
Param
Sweep
Doc
<instantiate>
...
Parameter
Sweep
Activity
Set
Job Container
With Parameter
Sweep Engine
<submit>
BES++ ? 7

8. Scenario – Legacy Parameter Sweep Systems
Default
JSDL
Template
Param
Sweep
Doc
<submit>
...
Job Container
With Parameter
Sweep Engine
JSDL
Template
<submit>
JSDL
Template
JSDL
Template
Legacy
Parameter
Sweep
Manager
BES++ ? 8

9. Scenario – Mapping to Legacy Parameter Sweep Systems: 1
Default
JSDL
Template
Param
Sweep
Doc M A P
Job Container
With Parameter
Sweep Engine
Legacy
Specific
Template
<submit>
Legacy
Parameter
Sweep
Manager
BES++ ? 9

10. Scenario – Mapping to Legacy Parameter Sweep Systems: 2
Default
JSDL
Template
Param
Sweep
Doc M A P
Legacy
Specific
Template
<submit>
Legacy
Parameter
Sweep
Manager 10

11. Use Cases (1) One element changes
One job submitted
Many elements change to the same value, at the same time
Many elements change to different values, at the same time
Many elements change to different values, while others change to the same value, all at the same time 11

12. Use Cases (2)
Many elements change to the same values, serially (one by one)
Many jobs submitted
Many elements change to different values, serially (one by one)
Many elements change to different values, at the same time
One job submitted
This is the same as 3. above! 12

13. Use Cases (3) Nested combinations of any above
For one element changed, iterate one other element
Many jobs submitted
For one element changed, iterate many other elements, all at the same time
For one element changed, iterate many elements independently at the same time
Etc. 13

14. From Use Case to XML Schema (1)
“One element changes”
Select the XML element that will change
Apply a function that alters the element’s value
Submit the JSDL
<Parameter> [selection] </Parameter>
<Function>
[function specification]
</Function> 14

15. From Use Case to XML Schema (2)
“Many elements change to the same value at the same time”
Select the XML elements that will change
Apply a function that alters the values of all selected elements
Submit the JSDL
<Parameter> [selection] </Parameter> …
<Function>
[function specification]
</Function> 15

16. From Use Case to XML Schema (3)
“Many elements change to different values at the same time”
Select the XML elements that will change
Apply the corresponding function that alters the individual element values
Submit the JSDL
<Parameter> [selection] </Parameter>
<Function>
[function specification]
</Function> … 16

17. From Use Case to XML Schema (4)
“Many elements change to different values while others altogether change to the same value, all at the same time”
Select the XML elements that will change
Apply the corresponding functions to the groups of XML element values
Submit the JSDL
<Parameter/>+
<Function/>
<Assignment>
<Parameter/>+
<Function/>
</Assignment> …
<Parameter> [selection] </Parameter>
<Function>
[function specification]
</Function> …
The ASSIGNMENT scope delimiter defines the association between the list of elements that get the same value at the same time 17

18. From Use Case to XML Schema (5)
“Many elements change to different values serially”
Select the XML element that will change first
Apply the associated function
Submit the JSDL
Select the XML element that will change next
<Sweep>+
<Assignment>
<Parameter/>+
<Function/>
</Assignment
</Sweep>
<Assignment>
<Parameter/>+
<Function/>
</Assignment
</Assignment> …
<Sweep>
<Assignment>
<Parameter/>+
<Function/>
</Assignment
</Sweep>
</Assignment> … 18

19. From Use Case to XML Schema (6)
“Many elements change to the same values serially”
Select the XML element that will change first
Apply the associated function
Submit the JSDL
Select the XML element that will change next
<Sweep>
<Assignment>
<Parameter/> (id = a)
<Function/> (id = 1)
</Assignment>
</Sweep>
<Parameter/> (id = b) … 19

20. From Use Case to XML Schema (7)
“Many elements change to different values at the same time”
Select the XML element that will change first
Apply the associated function
Submit the JSDL
Select the XML element that will change next
<Sweep>
<Assignment>
<Parameter/>+
<Function/>
</Assignment>
</Sweep> … 20

21. From Use Case to XML Schema (8)
“For one element change, iterate one other element”
Select the XML element that will change first
Apply the associated function
Select the next XML element
Submit the JSDL
<Sweep>
<Assignment>
<Parameter/>
<Function/>
</Assignment>
</Sweep> 21

22. From Use Case to XML Schema (9)
“For one element change, iterate many elements at the same time”
Select the XML element that will change first
Apply the associated function
Select the next XML elements
Apply the associated functions
Submit the JSDL
<Sweep>
<Assignment>
<Parameter/>+
<Function/>
</Assignment>
</Sweep> 22

23. From Use Case to XML Schema (10)
“For one element change, iterate many elements independently at the same time”
Select the XML element that will change first
Apply the associated function
Select the next XML elements
Apply the associated functions
Submit the JSDL
<Sweep>
<Assignment/>
<Assignment>
<Parameter/>+
<Function/>
</Assignment>
</Sweep> 23

24. From Use Case to XML Schema (11)
For those who didn’t already get lost
<Sweep>
<Assignment/>
</Sweep> 24

25. XML Schema: Building blocks (1)
Parameter
Uses XPath 2.0 to select
XML Element values, or
XML Element value fractions
Function
Assigns a value to the selected parameter, per iteration
Abstract base XML Element
Concrete functions defined as extensions 25

26. XML Schema: Building blocks (2)
Assignment
Associate Parameters with one Function
Each Parameter gets the same value per iteration
Sweep
Group Assignments for synchronous but independent value assignments
Nested Sweeps
For serial Assignment processing
For value set permutations 26

27. XML Schema: Pseudo code (1)
<Sweep>
<Assignment>+
<Parameter> xs:string </Parameter>+
<Function abstract=“true”/>
</Assignment>
<Sweep/>*
</Sweep> 27

28. XML Schema: Pseudo code (2)
<Values substitutionGroup=“Function”>
<Value> xs:string </Value>+
</Values>
<Loop substitutionGroup=“Function”
start=“xs:integer”
end=“xs:integer”
step=xs:positiveInteger”? >
<Exception value=“xs:integer”/>*
</Loop> 28

29. Examples One example per Use Case Draft schemas available
All examples validate
Complete download package
JSDL 1.0
JSDL POSIX Application 1.0
JSDL Sweep draft 29