[nvo-techwg] Minutes: NVO TWG 2009-04-02

[Douglas Tody]

Here is a revised list of NVO VOSpace use-cases including vopipe (at
least as I understand it).  Anything else?


So far as NVO or DAL use cases go we have at least the following:

    o	VOSpace integration into TAP.  We want to colocate a VOSpace
 	with the TAP service, and store tables in it on a per-user
 	basis.	These tables would appear in user queries as a schema,
 	e.g., VOSPACE.tablename.  Tables could be accessed directly
 	from the TAP service as well as via the VOSpace interface.

    o	VOSpace integration into SIAV2.  In this case we have a
 	simple file-oriented integration, storing mainly image
 	files produced by the SIA service, e.g., in async jobs.
 	Upload tables used for multi-position queries would also
 	be possible however.  The VOSpace would probably want to
 	be colocated with the service as for TAP.  TBD is whether
 	multiple services colocated on the same server might share
 	the same VOSpace implementation and context.

     o	The VOPipe facility, to be used to provide reliable, high
 	performance transport of very large files (or streams?) between
 	cooperating VOSpaces, or between a VOSpace and a client
 	application.

    o	VOSpace integration into VOClient and DALServer (these are
    	NVO-specific application use-cases).

    o	Various proposed NVO use cases / applications such as TAP-based
 	replacements for OpenSkyQuery and CASJOBS would use VOSpace
 	(these are probably the primary use cases ultimately for
 	our NVO TAP prototypes using VOSpace).	In particular for a
 	CASJOBS like facility where we can save the output of a query
 	and use it as input in a subsequent query, a per-user VOSpace
 	colocated at the service is required to be able to store the
 	intermediate tables.

    o	Use of VOSpace for observatory or data center data access
 	and retrieval.	For example, we would like to be able to use
 	and rely upon VOSpace and VO authentication for access to
 	proprietary data from NRAO and ALMA telescopes, or for local
 	storage of data on a per-user basis.