International Virtual Observatory Alliance

Difference: IvoaExecMeetingFM20 (10 vs. 11)

Revision 112006-08-13 - GuyRixon

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IVOA Executive Committee Meeting (FM20)

Thurs Aug 17 2006 @ 17.30-20.00 Local Time (Prague, Czech Republic)

Contents

Logistics

Meeting will take place in room DR225 at the IAU Conference Location - see http://www.astronomy2006.com/congress-centre.php

Agenda

Roll Call and Agenda
Minutes of TM19
Review of Actions
Status on Participation of Brazilian VO (continued)
Approval of new IVOA Recommendation(s)
VO WG of IAU - IAU VO WG Charter
Status of Implementation of IVOA standards in Data Centers
Mandates/Working Method of WGs/IGs
Autumn Interoperability meeting in Moscow
Chair(s) of VOQL and Registry WGs
New deputy chair (and future of the executive committee)
AOB
- Summary of this meeting
- Date and Venue of the next exec meeting (telecon ?)
- Future InterOp meetings after 2007 Spring
Summary of Actions

Reports from the Projects

ArVO

AstroGrid

China-VO

CVO

VObs.it (aka DRACO) Italy

Euro-VO

France VO

GAVO

HVO

Japan-VO

Korean VO

NVO

RVO

SVO

VO-India

Reports from WGs

Grid and Web Services Working Group

Added:

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Most effort available to the working group has been dedicated to VOSpace. The VOSpace standard is now approaching a v1.0 WD and three prototypes of VOSpace-1 are being built, at Caltech, at ESO and in AstroGrid.

It is intended to demonstrate at the Moscow Interop a "strawman" protoype of an asynchronous query-service based on UWS-PA. This will consume ADQL v1.0 and may inform the query-language/query-service debate. An initial draft of the UWS-PA contract, based on the prototype, will be presented at the same time.

Semantics/UCD WG

Data Models WG

Data Access Layer WG

Registry WG

Document Standards WG -

this group is no longer active

VOEvent WG

Since the Victoria meeting, the VOEvent specification has been issued as a Proposed Recommendation, with a four-week Request for Comment period that started July 11. The page can be found at http://www.ivoa.net/twiki/bin/view/IVOA/VOEventRFC . A few small changes have been made to the spcieifcaiton and schema. There are interoperable prototypes running at Caltech, Exeter, and Los Alamos. The Working Group is hoping for a vote on Recommendation at this meeting.

VOTable WG

VOQL WG

Applications IG

Theory IG

The main tasks the theory group set itself in Victoria were: 1. Unified proposal for theory specific additions to Semantics UCD and Vocabulary lists. Laurie Shaw is leading this effort, but is also writing up his PhD thesis, hence delays. Frank LePetit and others have made contributions to this effort on the mailing list. 2. Write a proposal for a "Simple Numerical Access Protocol". Claudia Gheller leads this effort, which includes the testing of binary VOTable formats for use by theorists. He has proposed (on the mailing list) an approach for this and asked for feedback and prototype implementations for simulation data. 3. A poll among theorists about the data formats they use for storing (large) simulation results. Dave Zurek leads this effort which, after reminding, he is taking up actively now. 4. A data model for simulation metadata. Gerard Lemson leads this effort which has not progressed since Victoria, but will have a draft by Moscow.

Data Curation and Preservation IG

The preservation community (archivist profession) is now testing use of data grids to build preservation environments. A major step forward was the publication of the paper by R. Moore on “Building Preservation Environments with Data Grid Technology”, American Archivist, vol. 69, no. 1, pp. 139-158, July 2006. This paper defines why the preservation concepts of authenticity and integrity need to be augmented with digital preservation concepts of infrastructure independence, scalability, and federation. An implementation using the Storage Resource Broker data grid is presented.

Irene Barg has applied the SRB data grid technology for preservation of National Optical Astronomy Observatory images. The NOAO implementation federates six independent data grids, and pulls images from a data grid that manages images taken at the telescope in Cerro Tololo, to a data grid in La Serena, Chile, to a data grid in Tucson, Arizona, and then to an archive at NCSA.

The Global Grid Forum has initiated a Grid Interoperation Now working group to test the federation of independent data grids. The original federation effort for the 17th Global Grid Forum meeting demonstrated a federation of 14 SRB data grids, including the NOAO, DEISA, Rutherford Appleton Laboratory, SARA, Taiwan ASGC, Japan KEK and Teragrid data grids. In collaboration with the GGF Preservation Environments working group, a demonstration is planned for the 18th Global Grid Forum meeting in Washington DC on Sept 11-14, 2006 of the use of the federated data grids for preservation. Irene Barg is contributing a 1-Gigabyte image collection that will be replicated between multiple data grids within the federation. The goal is to demonstrate compliance with authenticity and integrity assertions.

The Large-scale Synoptic Survey Telescope project has also been exploring preservation requirements. They currently envision the preservation of more than 100 Petabytes of data, starting in 2013. A testbed similar to that used by NOAO is being implemented (R. Plante). Three SRB data grids are being federated to emulate the telescope at the top of the mountain, the base station at the bottom of the mountain, and the archive. The system will be used to evaluate the capability of current data grid technology to manage preservation of 5 Terabytes of data per day.

Astro-RG IG

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