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Artifact artf5496 : Meaning of DataStaging with no Source or Target

Tracker:	[CLOSED] JSDL v1.0 Errata
Title:	Meaning of DataStaging with no Source or Target
Description:	Hello, I'm writing a JSDL->classad-based JDL converter, and I have a question related to the interpretation of the jsdl: DataStaging element. According to the definition, the jsdl:DataStaging element may have two child elements (both of which are optional) jsdl: Source and jsdl:Target. As I understand: - if only the jsdl:Source child is given, the DataStaging element refers to a request to copy files TO the execution node; - if only the jsdl:Target child is given, the DataStaging element refers to a request to copy files FROM the execution node, upon job termination; - if both jsdl:Source AND jsdl:Target children are given, then the previous two cases are combined (first the file is staged in, and upon job termination is staged out). Now, I do not fully understand the meaning of having a DataStaging element without jsdl:Source nor jsdl:Target. How should we interpret this situation? Thanks in advance, Moreno.
Submitted By:	Andreas Savva
Submitted On:	06/30/2006 2:00 AM EDT
Last Modified:	04/04/2007 10:51 AM EDT
Closed:	04/04/2007 10:51 AM EDT

	Status / Comments		Change Log		Associations		Attachments

Status
Group: *
Status:*	Closed
Category: *
Customer: *
Priority: *	4
Assigned To: *	Donal Fellows
Reported in Release: *
Fixed in Release: *
Estimated Hours: *	0
Actual Hours: *	0

Comments

Andreas Savva: 04/04/2007 10:51 AM EDT
	Comment:	Verified draft3
	Action:	Update Closed set to 04/04/2007 Status changed from Fixed to Closed

Donal Fellows: 04/04/2007 6:34 AM EDT

Comment:

Just a note that it is also possible to describe things using this mechanism that are essentially useless (e.g. a file that is not staged in, staged 
out, or given special deletion treatment on termination). Consumers might choose to complain (e.g. throw a fault) in that situation, or they might 
decide to just ignore the file (no-ops are easy).

Action:

Update

Andreas Savva: 04/04/2007 6:25 AM EDT

Comment:

Added to 6.5.1.1 Data Staging

A DataStaging element typically contains either a Source or a Target element, or both. It is possi-ble, however, that neither a Source nor a Target 
element is present. In this case no stage in or stage out occurs. The DeleteOnTermination element can still be used to cleanup files as de-scribed in 
this section.

Action:

Update
Status changed from Resolved to Fixed

Andreas Savva: 09/13/2006 2:05 PM EDT
	Comment:	Add clarification
	Action:	Update Assigned To set to Donal Fellows Status changed from Open to Resolved

Andreas Savva: 06/30/2006 2:01 AM EDT

Comment:

Since there is no specific statement about this in the specification you
should interpret it using the existing rules.
- There is no jsdl:Source so you don't stage in
- There is no jsdl:Target so you don't stage out
- If jsdl:DeleteOnTermination exists then use it, otherwise do nothing

This actually allows for the fringe (from our perspective) case of just
 cleaning up a file from a host.

Thanks, good question. We should probably add explanation in a future
version of the spec.

Action:

Update

Andreas Savva: 06/30/2006 2:00 AM EDT
	Action:	Create

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