International Virtual Observatory Alliance

Difference: VOSpaceHome (12 vs. 13)

Revision 132008-10-06 - DaveMorris

META TOPICPARENT	name="IvoaGridAndWebServices"

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VOSpace

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IVOA Grid & Web Services: VOSpace

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This is the main page for the VOSpace working group.

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Contents

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The main participants in developing this standard are :

Matthew Graham (CalTech)
Paul Harrison (ESO)

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Overview

Users want to be able to easily publish and share their own data as well as have data reside close to computation nodes when large-scale processing or dynamic caches for intermediate data products in workflows are involved. Three modes of data transfer need to be supported: client-server (the client pushes data to, or pulls data from, the server), server-client (the server pushes data to, or pulls data from, the client) and server-server (one server pushes data to, or pulls data from, another server in response to a client request) also known as third-party transfer.

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Dave Morris (AstroGrid)
Guy Rixon (AstroGrid)

Version 1.0

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Version 1.0 of the specification is now an IVOA Recommendation.

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There are many solutions already to these problems so instead of inventing our own we specify a lightweight interface, VOSpace, that sits on top of existing storage solutions, providing a common interface to an underlying heterogeneity of implementations from local file systems to bulk data grids. VOSpace can distinguish between unstructured data, which is just a collection of bytes, and structured data where there is knowledge about how the bytes are arranged and so additional operations are possible. Individual VOSpace instances can also be federated into a peer network so that the user just interacts with a single data space.

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This covers the node identifiers and metadata, a flat file space, and the data transfer methods.

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VOSpace 1.x specifications relate to a SOAP-based web service.

VOSpace 1.0

VOSpace 1.0 defines an unconnected flat file space and is now an IVOA Recommendation:

Specification

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VOSpace usage note v0.1

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VOSpace-Usage.odt: vospace usage note version 0.1

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VOSpace 1.1

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VOSpace 1.1 extends the existing 1.0 specification to support containers, links between individual VOSpace instances, third party APIs and a "find" mechanism.

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Version 1.1

Version 1.1 aims to extend the VOSpace-1.0 specification to include links and containers.

Specification

Service specification

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Discussion

Discussion page for 1.1 specification

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Old discussion page for VOSpace 1.1 features

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Mailing list archive

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Version 2.0

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History

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Version 2.0 is a longer term project looking at changing the service from a SOAP service to a REST based service.

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Old discussion page for VOSpace 1.1 features

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VOSpace 2.0

VOSpace 2.0 defines a RESTful interface.

Specification

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This version on the specification is under discussion.

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Nothing ready quite yet.

Discussion

Discussion page for specification

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Mailing list archive

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Version 1.0 history

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Implementations

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Discussion

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group	version	endpoint	VOSpace root	Notes

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Caltech	v1.1	testnvo.cacr.caltech.edu	vos://nvo.caltech!vospace/	HTTP transports, supports structured nodes and archive formats (tar, tar.gz)
ESO	v1.0	vops1.hq.eso.org	vos://org.eso!vospacetest/	HTTP transports
Astrogrid

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The registry schema for describing propeties, formats etc is still under discussion. The discussion about the registry schema is now linked to version 1.1 of the service specification.

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Mailing list

The mailing list for discussion of the VOSpace specifications and related issues is: vospace@ivoa.net which is archived at: http://ivoa.net/forum/vospace/index.htm

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VOSpace 1.0 history

Discussion

Discussion page for property registration
Resource schema (old version)
Example document (old version)

The discussion pages that lead up to the V1.0 working draft are available here :

Discussion page for the WSDL and XML schema (closed)
Discussion page for specification (closed)
Mailing list archive

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Implementations

group	endpoint	VOSpace Root	Notes
Caltech
ESO	vops1.hq.eso.org	vos://org.eso!vospacetest/	http transports
Astrogrid

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META FILEATTACHMENT	attr="" comment="vospace usage note version 0.1" date="1191255539" name="VOSpace-Usage.odt" path="VOSpace-Usage.odt" size="206292" user="PaulHarrison" version="1.1"
META FILEATTACHMENT	attr="" comment="VOSpace 1.1 RC1 WSDL" date="1205254714" name="vospace.wsdl" path="vospace.wsdl" size="51728" user="MatthewGraham" version="1.1"
META FILEATTACHMENT	attr="" comment="VOSpace 1.1 RC1 Message Schema" date="1205254780" name="VOSpaceTypes-v1.1rc1.xsd" path="VOSpaceTypes-v1.1rc1.xsd" size="53488" user="MatthewGraham" version="1.1"

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META FILEATTACHMENT	attr="" comment="VOSPace 1.1-rc3 wsdl" date="1223325325" name="VOSpaceContract-v1.1-rc3.wsdl" path="VOSpaceContract-v1.1-rc3.wsdl" size="56496" user="DaveMorris" version="1.1"
META FILEATTACHMENT	attr="" comment="VOSPace 1.1-rc3 schema" date="1223325355" name="VOSpaceTypes-v1.1-rc3.xsd" path="VOSpaceTypes-v1.1-rc3.xsd" size="54832" user="DaveMorris" version="1.1"

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