January 2006 - ogsa-d-wg

Minutes of F2F meeting
by Dave Berry 31 Jan '06

31 Jan '06

Two sets of minutes from the Sunnyvale F2F are on GridForge. One is my report of the discussion we had about files on the Monday morning (http://tinyurl.com/c3gp3) The other is Neil's report of the OGSA WG session on ByteIO and the Data Architecture on the Thursday morning (http://tinyurl.com/c85w2) Dave.

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The big picture, version 2
by Dave Berry 30 Jan '06

30 Jan '06

All, Here is a revised version of the "big picture" architecture diagrams. I've taken account of the feedback I received by e-mail and at last week's meeting. Please take a look and send comments. Dave.

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Who should maintain URIs for data formats, query languages, transfer protocols, etc.?
by Dave Berry 30 Jan '06

30 Jan '06

All, One set of gaps in the current data architecture concerns lists of URIs for naming data formats, query languages, transfer protocols, access interfaces, and similar entities. We need URIs to name these things, but it isn't clear who should (a) choose those URIs and (b) maintain these lists. Here are some possibilities: I'd appreciate your thoughts and comments. One possibility is that GGF should have a group specifically to do this (possibly even the OGSA-D group ourselves). As people request new URIs, this WG could issue them, and record them in a central list. Or, people could submit URIs that they have defined themselves, and the WG could maintain a list of them. Another possibility is that each WG that defines an interface could define any relevant sets of URIs. This is along the lines of GFD.58 (which actually defines namespaces), and is the approach that ByteIO are using. The advantage of this is that the work is decentralised. The disadvantage is that the URIs may be used by more than one specification (in fact we generally hope that this will be the case), so the burden of maintaining the list may fall on people who are no longer involved. Also, WGs are disbanded when their work is complete. One important consideration is that many vendors will want to define their own URIs. E.g. a vendor may want a variant of SQL to be defined with a URI under a namespace of that vendor. Conversely, we can't require every supplier to create their own URI, because many will not bother to do so. It's possible that we don't need a central list of all such URIs. If various groups define URIs themselves, then as long as users know which URI applies to their case, they can use it successfully. Volunteer sites could record lists of commonly-used URIs. The disadvantage of this is that it may lead to synonyms, which might cause confusion. Dave Berry Research Manager, National e-Science Centre 15 South College St., Edinburgh Tel: +44 131 6514039

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Telcon agenda for February 1st
by Dave Berry 30 Jan '06

30 Jan '06

Dear All, The next teleconference of the OGSA Data Architecture working group will be held on Wednesday, February 1st, 2006 at the usual time of 8:00am Pacific / 11:00am Eastern / 4:00pm UK / 5:00pm Europe. In this telcon we will review progress, including the items discussed on the mailing list this week. Please contribute your ideas and suggestions. If you would like to propose other topics, please contact me. Here is the updated teleconference information: UK dialin: 0845 245 0224 US dialin: 1 866 838 0046 Intl dialin: +44 1452 542309 Passcode: 275359 Agenda for the February 1st teleconference: 1) Early discussion (5 minutes) Note taker assignment Roll call Minutes Approval (http://tinyurl.com/9g9eb) Agenda bashing 2) Action report (5 minutes) - Stephen to add a paragraph to the architecture document about reasons for naming. - Stephen will update the scenarios document with comments from the F2F. - Dave to start a mail conversation about managing URIs. - Dave to revise the "big picture" diagrams. - Dave to send draft definition of "data federation" to list for feedback. - Allen to work on an integration pass, including a scoping section. - Ann to check the Access section for suitability for file replication. - Mario to arrange update of the ByteIO subsection. - Section authors to add security notes to their sections. - Everyone to talk with your contacts to get more participation in this WG. - Allen/Dave to contact David Martin & Hiro Kishimoto to get reviewers & expert participation. 3) Progress & planning update (5 minutes) Report of F2F meeting Update on document writing, links with other WGs, plans for telcons up to GGF16. 4) Review of F2F presentation (40 minutes) Overview of architecture document. Identify gaps that need to be addressed. Clarify scope. etc. 5) Wrap up (5 minutes) Next meetings: Feb 8th: Document reviews Feb 13th-16th: GGF16 in Athens Dave Berry Research Manager, National e-Science Centre 15 South College St., Edinburgh Tel: +44 131 6514039

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[ogsa-wg] Survey for GGF16, GGF17, and interim F2F in April
by Hiro Kishimoto 30 Jan '06

30 Jan '06

Hi all, and sorry for the cross-posting. As you already know, OGSA-WG is planning to have F2F meetings back-to-back with GGF16 (Athens) and GGF17 (Tokyo). We are also planning to have interim F2F meeting in April (venue TBD). Please let us know your plan for attendance and preference by answering the following on-line survey. http://www.zoomerang.com/survey.zgi?p=WEB224YECBCXZY OGSA-WG will discuss meeting plans at the upcoming weekly call on Monday, Jan. 30th, 4-6pm CST. And hard deadline for this survey is Sunday, Feb. 5th. Thanks, -- Hiro Kishimoto

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RE: Data federation definition
by Dave Berry 27 Jan '06

27 Jan '06

Folks, We need a definition of how we are using the term "data federation", for the OGSA glossary. Fortunately we don';t have to find a definition that covers all the ways the term is used in the world, just how we use it in our document. Following a short discussion at the OGSA F2F, Jem (who is keeper of the glossary) suggested the following; The integration of multiple data resources so that they can be accessed as if they were a single resource. Allen suggested that as we are accessing data via services, this would be better phrased as follows (see the attached message for Allen's explanation in his own words): The integration of multiple services or data resources so that they can be accessed as if they were a single service. We discussed this on yesterday's call and the consensus was that I should post to the list and ask for your comments. We briefly discussed whether we should separately define "data federation" and "data integration". One view was that "integration" didn't necessarily involve distributed resources while "federation" didn't necessarily involve integrating the resources into a single view. The contrasting view was that integration almost always involves distributed data in practice, and especially so in a Grid context, while federation typically requires some way of accessing the distributed data as a whole. So I'm leaning towards treated the terms as synonyms within our documents. What do you think? Dave. _____ From: Treadwell, Jem [mailto:jem.treadwell@hp.com] Sent: 19 January 2006 23:17 To: Dave Berry Subject: Data federation definition Dave: This is (very slightly) modified from your document - though you don't have the glossary entry filled in :0) The integration of multiple data resources to so that they can be accessed as if they were a single resource. - Jem _____ Jem Treadwell Hewlett-Packard Company 6000 Irwin Road Mount Laurel, NJ 08054 Phone: 856-638-6021 Fax: 856-638-6190 E-mail: Jem.Treadwell(a)hp.com <mailto:Jem.Treadwell@hp.com>

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International Provenance and Annotation Workshop 2006
by Dave Berry 24 Jan '06

24 Jan '06

Please find attached a call for papers for IPAW 06. Dave Berry Research Manager, National e-Science Centre 15 South College St., Edinburgh Tel: +44 131 6514039

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RE: [ogsa-d-wg] The big picture
by Stephen Davey 23 Jan '06

23 Jan '06

Hi Dave, I think the pictures give a nice illustration of the basic structure. On the 2 diagrams you have a line going directly from the Storage Service to the Stored Resources Service. Should this line actually go via an interface on one or other of the services? Cheers, Stephen. -----Original Message----- From: owner-ogsa-d-wg(a)ggf.org [mailto:owner-ogsa-d-wg@ggf.org] On Behalf Of Dave Berry Sent: 22 January 2006 16:37 To: ogsa-d-wg(a)gridforum.org Subject: [ogsa-d-wg] The big picture Dear All, I've been asked to provide a diagram that shows the "big picture" of the OGSA Data Architecture. This would be used in the OGSA 1.5 document and in the overview section of our document(s), and perhaps also in powerpoint presentations. I've come up with the pair of diagrams and associated text in the attachment. Please take a look. Best wishes, Dave Berry Research Manager, National e-Science Centre 15 South College St., Edinburgh Tel: +44 131 6514039

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The big picture
by Dave Berry 23 Jan '06

23 Jan '06

Dear All, I've been asked to provide a diagram that shows the "big picture" of the OGSA Data Architecture. This would be used in the OGSA 1.5 document and in the overview section of our document(s), and perhaps also in powerpoint presentations. I've come up with the pair of diagrams and associated text in the attachment. Please take a look. Best wishes, Dave Berry Research Manager, National e-Science Centre 15 South College St., Edinburgh Tel: +44 131 6514039

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Telcon agenda for January 25th - Gap analysis
by Dave Berry 22 Jan '06

22 Jan '06

Dear All, The next teleconference of the OGSA Data Architecture working group will be held on Wednesday, January 25th, 2006 at the usual time of 8:00am Pacific / 11:00am Eastern / 4:00pm UK / 5:00pm Europe. In this telcon we will review the presentation that Allen & I prepared for this week's OGSA F2F, which includes a gap analysis of the data architecture (http://tinyurl.com/bpujm) Please contribute your ideas and suggestions. Here is the updated teleconference information: UK dialin: 0845 245 0224 US dialin: 1 866 838 0046 Intl dialin: +44 1452 542309 Passcode: 275359 Agenda for the January 25th teleconference: 1) Early discussion (5 minutes) Note taker assignment Roll call Minutes Approval (http://tinyurl.com/7uoyd) Agenda bashing 2) Action report (5 minutes) - Dave to check dates for submitting documents for GGF16 [We've missed it] - Allen to work on an integration pass, including a scoping section. - Dave to investigate Skype or phone for OGSA Data session at F2F. [Done] - Ann to check the Access section for suitability for file replication. - Mario to update the Access section and make text available for comment. - Section authors to add security notes to their sections. - Everyone to talk with your contacts to get more participation in this WG. - Allen/Dave to contact David Martin & Hiro Kishimoto to get reviewers & expert participation. 3) Progress & planning update (5 minutes) Report of F2F meeting Update on document writing, links with other WGs, plans for telcons up to GGF16. 4) Review of F2F presentation (40 minutes) Overview of architecture document. Identify gaps that need to be addressed. Clarify scope. etc. 5) Wrap up (5 minutes) Next meetings: Feb 1st: Feb 8th: Feb 13th-16th: GGF16 in Athens Dave Berry Research Manager, National e-Science Centre 15 South College St., Edinburgh Tel: +44 131 6514039

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