GPGPU-WG KnowledgeBase GLUE2 Profile Application

The Working Group shall define an EGI Community standard that encapsulates the application software required on Worker Nodes in order to support Computational Accelerators.

There are two classes to consider here:

• The ApplicationEnvironment is a significant extension to the GLUE1 GlueHostApplicationSoftwareRunTimeEnvironment.
• The ApplicationHandle can indicate how an to describe an ApplicationEnvironment instance can setup the software environment.

The GIP plugin glite-ce-glue2-applicationenvironment-dynamic produces ApplicationEnvironment data by converting the basic GLUE1 GlueHostApplicationSoftwareRunTimeEnvironment to a simple ApplicationEnvironment instance.

The ApplicationEnvironment is a GLUE2 class that describes the software environment in which a job will run.

• Each Application is identified by a name.
• These names are not defined by the schema, but should be assigned in a way that allows applications to be uniquely identified.
• The ApplicationEnvironment is defined as follows:

ApplicationEnvironment
Entity	Inherits from			Description
ApplicationEnvironment	Entity			A description of the installed application software available or software environment characteristics available within one or more Execution Environments.
Inherited Attribute	Type	Mult	Unit	Description
Creation Time	DateTime_t	0..1		Timestamp describing when the entity instance was created
Validity	Unit64	0..1	s	The duration after CreationTime that the information presented in the Entity SHOULD be considered relevant. After that period has elapsed, the information SHOULD NOT be consideredrelevant
ID [key]	URI	1		A global unique ID
Name	String	0..1		Human Readable name
OtherInfo	String	*		Placeholder to publish info that does not fit in any other attribute. Free-form string, comma-separated tags, (name, value ) pair are all examples of valid syntax.
Attribute	Type	Mult	Unit	Description
AppName	String	1		The name of the application or environment.
AppVersion	String	0..1		The version of the application or environment, as defined by the supplier.
Repository	URL	0..1		The URL of a service which offers a name service and/or a repository for this application environment. Application environments can be categorized under namespaces maintained by application repositories.
State	AppEnvStat_t	0..1		The current installation state of the application.
RemovalDate	DateTime_t	0..1		The date and time after which the application MAY be removed.
License	License_t	0..1		The type of license under which the application is usable
Description	String	0.1		A human-readable description of this application or environment.
BestBenchmark	Benckmark_t	*		The type of benchmark which best identifies the sensitivity of this application to the performance of the Execution Environment, which can be compared with the rating published via the Benchmark class.
ParallelSupport	ParallelSupport_t	0..1		The type of supported parallel execution framework
MaxSlots	UInt32	0..1	slot	The maximum number of concurrent slots that may be used to run jobs using the application
MaxJobs	UInt32	0..1	job	The maximum number of concurrent jobs that may use the application
MaxUserSeats	UInt32	0..1	user seat	The maximum number of concurrent user seats (i.e. distinct users) that may use the application.
FreeSlots	UInt32	0..1	slot	The number of slots currently available to run jobs using the application
FreeJobs	UInt32	0..1	job	The number of jobs that could immediately start their execution using the application
FreeUserSeats	UInt32	0..1	user seat	The current number of free seats for additional users to use the application.
Association End		Mult.	Description
ExecutionEnvironment.ID		*	An application environment MAY be used in zero or more execution environments
ComputingManager.ID		1	An application environment is part of a computing manager.
ApplicationHandle.ID		*	An application environment MAY be handled via zero or more application handles.
Inherited Association End		Mult.	Description
Extension.Key		*	The entity MAY be extended via key-value pairs

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The ApplicationHandle class is an extension to ApplicationEnvironment for applications which need to be set up in some way before they can be used. For each supported setup method a string MAY be specified, the interpretation of which is specific to the method - in the simplest case this could just be a setup script to execute. A single Application MAY support multiple setup methods.

Note: The OGF Glue 2 Specification defines the ApplicationHandle_t as an open numeration, with values of:

• executable
• module
• Path
• softenv

Presently no information is published in the BDII that uses this Class. However, it may be seen as a very good way to correctly bootstrap the environment for the users job.

ApplicationHandle
Entity	Inherits from			Description
ApplicationHandle	Entity			The description of a technique for bootstrapping and/or accessing an application environment.
Inherited Attribute	Type	Mult	Unit	Description
Creation Time	DateTime_t	0..1		Timestamp describing when the entity instance was created
Validity	Unit64	0..1	s	The duration after CreationTime that the information presented in the Entity SHOULD be considered relevant. After that period has elapsed, the information SHOULD NOT be consideredrelevant
ID [key]	URI	1		A global unique ID
Name	String	0..1		Human Readable name
OtherInfo	String	*		Placeholder to publish info that does not fit in any other attribute. Free-form string, comma-separated tags, (name, value ) pair are all examples of valid syntax.
Attribute	Type	Mult	Unit	Description
Type	ApplicationHandle_t	1		The type of method used to set up this application environment.
Value	String	1		A string which defines how to set up this application in the context of the setup method specified by the Type
Association End		Mult.	Description
ApplicationEnvironment.ID		1	An application handle MAY be used for one application environment.
Inherited Association End		Mult.	Description
Extension.Key		*	The entity MAY be extended via key-value pairs