October 2007 - ogsa-dmi-wg

call tomorrow ?
by Ravi Madduri 31 Oct '07

31 Oct '07

All: Should we have a call tomorrow ? I think Michel and Mario are not going to show up. I can set up a freeconference.com number if we decide to have a call. Thanks

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***SPAM*** DMI Use Cases
by Steven Newhouse 29 Oct '07

29 Oct '07

Following on from OGF we need to clarify how the DEPRs can be used to support different uses of DMI. Hopefully, this document provides some clarification. Steven

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Telcon minutes
by Mario Antonioletti 24 Oct '07

24 Oct '07

DMI Telcon - 24 October 2007 ============================ Attendees: Steve Newhouse, Microsoft Mario Antonioletti, EPCC Allen Luniewski, IBM Ravi Madduri, ANL Agenda: 1. IPR Notice 2. Previous Minutes and Action Review 3. OGF21 Review 4. What Next? 5. AOB +--- Actions: [Ravi] Resolve minor comments on the spec. [Ravi] Come up with a proposal on how to represent data aggregates (e.g. multiple files) with Data EPRs to the mailing list. [Ravi] Come up with a proposal for a multiple retries property to the mailing list. [Steve/Michel] Come up with a proposal for Data ERPs that can deal with the three scenarios proposed below. No notes were taken at the OGF21 session. Ravi does not have time to look at the document at the moment so Steven will take the write token to extend the Data EPR section to deal with the scenarios below. Ravi will then resolve some of his own minor outstanding comments in the spec. In addition Ravi will propose how the spec can specify: Number of retries to do a transfer. How Data EPRs can be used to represent data aggregates, in particular multiple files (though it should not be file centric). OGF21 - re-opened the discussion on the level of abstraction to be used to represent data and how to resolve source and sinks. Ravi is concerned that current representation of Data EPRs is too abstract and requires at least an additional operation to resolve the data EPRs to files. This would add unnecessary overhead - a more explicit representation of the data to be transfered is desired. In addition, there is nothing out there that currently implements the name resolution already so we would have to specify this and require data providers to implement in order for DMI to be useful. Allen is concerned that this might make files special in the DMI architecture which would be highly undesirable. Steven discussed the above with Michel in Seattle and the thought that the present architecture could handle all three use cases without having to refactor the DMI document, mainly: 1. The Data EPR could contains a URL which would represent the transfer protocol, for instance ftp, and the data, e.g. a file that is to be transferred. 2. The Data EPR could could have information specifying multiple supported protocols that the DMTF would have to negotiate with the data source/sink to find the best protocol for the data transfer. 3. Have a logical Data EPR that would have to be resolved to obtain information about the data that is to be transferred and the supported protocols. Steven/Michel to substantiate this proposal for the group to consider. Other OGF points Ravi talked to Erwin Laure at OGF - one of the things that would be desirable is for DMI to provide a reference model for RFT, FTS, RDF, srmcopy and SDF to look to similar to each other in terms of the inputs and output and behaviour. Michel & Steven had some more DMI discussion at the OGSA f2f - got some comments there - will be in the OGSA f2f meeting minutes. Largely the comments were positive - there were no objections. We need to get a period of stability in the spec in order to be able to produce some implementation and come together to resolve any issues afore the spec goes to public comment. Steven mentioned that some security stuff came up - The HPC Basic profile is currently looking at activity credentials - passing credentials to do things like data movement on behalf of a user - there is some recognition that the DMI use case for credentials is very similar to the HPC Profile. Can try to leverage off any HPC Profile work on this work. Not worth blocking on but it might be worth reconsidering after the DMI implementations phase. Mario will not be able to make the call next week. +-----------------------------------------------------------------------+ |Mario Antonioletti:EPCC,JCMB,The King's Buildings,Edinburgh EH9 3JZ. | |Tel:0131 650 5141|mario@epcc.ed.ac.uk|http://www.epcc.ed.ac.uk/~mario/ | +-----------------------------------------------------------------------+

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Telcon
by Mario Antonioletti 24 Oct '07

24 Oct '07

Hi, Just a short reminder about today's DMI Telcon - thanks to Steven once again for providing the telcon numbers, Date: 25th October 2007 When: 9am (Pacific) 11am (Eastern) 5pm (UK) PIN: 2719140 USA: +1 866 500 6738 (Toll: +1-203-480-8000) UK: +44 118 909 2000 a plausible agenda for this meeting will be: Agenda: 1. IPR Notice 2. Previous Minutes and Action Review 3. OGF21 Review 4. What Next? 5. AOB Can change the above agenda on the call as required. +-----------------------------------------------------------------------+ |Mario Antonioletti:EPCC,JCMB,The King's Buildings,Edinburgh EH9 3JZ. | |Tel:0131 650 5141|mario@epcc.ed.ac.uk|http://www.epcc.ed.ac.uk/~mario/ | +-----------------------------------------------------------------------+

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Attending sessions
by Ravi Madduri 15 Oct '07

15 Oct '07

All: I know we made a list of sessions one of us should be attending at OGF but some how i lost the list.. Could somebody help me out here ? -- -- Ravi Ravi K Madduri The Globus Alliance | Argonne National Laboratory http://www-unix.mcs.anl.gov/~madduri

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No call this week
by Mario Antonioletti 15 Oct '07

15 Oct '07

Hi, There will be no call this week as most of the folks are at OGF21. The next scheduled call will be the week after. Mario +-----------------------------------------------------------------------+ |Mario Antonioletti:EPCC,JCMB,The King's Buildings,Edinburgh EH9 3JZ. | |Tel:0131 650 5141|mario@epcc.ed.ac.uk|http://www.epcc.ed.ac.uk/~mario/ | +-----------------------------------------------------------------------+

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Fwd: Data Area Meeting at OGF21
by Ravi Madduri 12 Oct '07

12 Oct '07

Is there a recommended slide for this ? ---------- Forwarded message ---------- From: David E Martin <martinde(a)us.ibm.com> Date: Oct 11, 2007 5:58 PM Subject: Data Area Meeting at OGF21 To: Mark Morgan <mmm2a(a)virginia.edu>, Neil Chue Hong < N.ChueHong(a)epcc.ed.ac.uk>, Dave Pearson <dave.pearson(a)oracle.com>, Mike Beckerle <beckerle(a)us.ibm.com>, Martin Westhead <westhead(a)avaya.com>, Osamu Tatebe <o.tatebe(a)aist.go.jp>, Arun Jagatheesan <arun(a)sdsc.edu>, "William E. Allcock" <allcock(a)mcs.anl.gov>, Igor Mandrichenko <ivm(a)fnal.gov>, Arie Shoshani <shoshani(a)lbl.gov>, Jens Jensen <j.jensen(a)rl.ac.uk>, Steve Fisher < s.m.fisher(a)rl.ac.uk>, Dieter Gawlick <dieter.gawlick(a)oracle.com>, Allen Luniewski <luniew(a)us.ibm.com>, Dave Berry <daveb(a)nesc.ac.uk>, Mario Antonioletti <mario(a)epcc.ed.ac.uk>, Ravi Madduri <madduri(a)mcs.anl.gov>, Vincent.Franceschini(a)hds.com Cc: Erwin Laure <Erwin.Laure(a)cern.ch> Dear Data Area Chairs, A few items for OGF21 *Data Area Meeting* We'll have a Data Area Meeting at 3:15 on Wednesday. The agenda will be 1. Group Reviews 2. Data Area Demonstrations at SC07 3. SNIA/OGF Collaboration 4. Data Movement/Management Workshop at OGF22 Because of the tight agenda, I'd like to get a slide or two about your WG in advance. That will save the laptop-swap time. We'll try to keep the reports short. *Chair Appreciation Night* The Chair Appreciation Night will be Wednesday evening. If you haven't received and invitation, let me know. *Data/Compute Affinity - Focus on Data Caching* On Tuesday at 3:15 the Enterprise part of OGF will be holding a session on data caching. It could lead to a WG in data caching, so input from the Data Area is important. I look forward to seeing you in Seattle! David Martin Data Area Director Grid Forum Steering Group Open Grid Forum martinde(a)us.ibm.com -- -- Ravi Ravi K Madduri The Globus Alliance | Argonne National Laboratory http://www-unix.mcs.anl.gov/~madduri

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Do we have a teleconf today?
by Michel Drescher 11 Oct '07

11 Oct '07

Folks, I didn't see an announcement, probably because Mario is busy. As Ravi is busy, too, there would be three potential participants left: Allen, Steven and me. So, Allen and Steven, what about you? Cheers, Michel

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Food for thought
by Michel Drescher 10 Oct '07

10 Oct '07

Guys, now that we resolved that the DTF should call the "GetAvailableProtocols()" operation on the source and sink data services. This is all fine and can be "WSDL-ized" fairly quickly. However, what do we do with the Credentials that the client of the DTF needs to pass into the DTF for it to properly instantiate the data transfer? I guess the signature of the DTF's "requestDataTransfer()" operation needs to change here. Cheers, Michel

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minutes
by Michel Drescher 10 Oct '07

10 Oct '07

Folks, here's the minutes of today's telecon. Cheers, Michel

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