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RE: Re: [ogsa-d-wg] Discovery Service - Returning Data
by Dave Berry 16 Mar '06

16 Mar '06

Allen, I'm also a bit concerned about this. I apologise, because I didn't realise when we were discussing this on the call that you had taken the action to make this change - I was in too much of a hurry to move on to the next item. My concern is that I don't know what it means to "return the data", in a context where we have several possible interfaces for accessing data, including ByteIO and the various DAIS specs, each of which operate on names. I don't think I understand Dieter's suggestion sufficiently well to see how it would affect the overall architecture. It certainly sounds an interesting idea and if we can incorporate it simply then that's all to the good, but I'd rather we had a longer talk with Dieter first. Best wishes, Dave. _____ From: owner-ogsa-d-wg(a)ggf.org [mailto:owner-ogsa-d-wg@ggf.org] On Behalf Of Allen Luniewski Sent: 16 March 2006 16:59 To: ogsa-d-wg(a)ggf.org Subject: Fw: Re: [ogsa-d-wg] Discovery Service - Returning Data Peter's mail bounced. Allen ----- Forwarded by Allen Luniewski/Almaden/IBM on 03/16/2006 08:54 AM ----- Message-ID: <20570961.451142526276621.OPEN-XCHANGE.WebMail.tomcat(a)sala.cscs.ch> Date: Thu, 16 Mar 2006 17:24:36 +0100 (CET) From: Peter Kunszt <pkunszt(a)cscs.ch> To: ogsa-d-wg(a)ggf.org Subject: Re: [ogsa-d-wg] Discovery Service - Returning Data hi allen i don't know.. i get an uneasy feeling when service discovery is mixed with ontologies and content. to me, e.g. DNS is service discovery already, and certainly it does not give me the semantics or content of the service. i would separate any kind of content retrieval from service discovery, it feels 'cleaner' for a SOA. otherwise i'm afraid service discovery will be too large a beast to manage.. just my swiss 2cents... cheers peter -----Urspr=C3=BCngliche Nachricht----- Von: owner-ogsa-d-wg(a)ggf.org im Auftrag von Allen Luniewski Gesendet: Mi 15.03.2006 18:26 An: ogsa-d-wg(a)ggf.org Betreff: [ogsa-d-wg] Discovery Service - Returning Data =C2=A0 At today's call, I took on an action to update the discovery service section to allow for discovery services that returned the data of interest rather than a reference to the data.=C2=A0 Here is the updated material for your=C2=A0 consideration: Resource Discovery Discovery services are vital to the data architecture.=C2=A0 The data services may use the discovery services not just for registering services themselves, but also for registering the data sets that are stored by those services. This requires languages or ontologies for describing data. Discovery services may also register the locations of schema definitions. Discovery services may be built upon metadata repositories that contain information about other entities in the grid such as resources, and services.=C2=A0 Some discovery services may return the name of the service and some may return an EPR to the service.=C2=A0 Some discovery services may ta= ke a description of the desired data as input and return the data itself. Allen

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Fw: Re: [ogsa-d-wg] Discovery Service - Returning Data
by Allen Luniewski 16 Mar '06

16 Mar '06

Peter's mail bounced. Allen ----- Forwarded by Allen Luniewski/Almaden/IBM on 03/16/2006 08:54 AM ----- Message-ID: <20570961.451142526276621.OPEN-XCHANGE.WebMail.tomcat(a)sala.cscs.ch> Date: Thu, 16 Mar 2006 17:24:36 +0100 (CET) From: Peter Kunszt <pkunszt(a)cscs.ch> To: ogsa-d-wg(a)ggf.org Subject: Re: [ogsa-d-wg] Discovery Service - Returning Data hi allen i don't know.. i get an uneasy feeling when service discovery is mixed with ontologies and content. to me, e.g. DNS is service discovery already, and certainly it does not give me the semantics or content of the service. i would separate any kind of content retrieval from service discovery, it feels 'cleaner' for a SOA. otherwise i'm afraid service discovery will be too large a beast to manage.. just my swiss 2cents... cheers peter -----Urspr=C3=BCngliche Nachricht----- Von: owner-ogsa-d-wg(a)ggf.org im Auftrag von Allen Luniewski Gesendet: Mi 15.03.2006 18:26 An: ogsa-d-wg(a)ggf.org Betreff: [ogsa-d-wg] Discovery Service - Returning Data =C2=A0 At today's call, I took on an action to update the discovery service section to allow for discovery services that returned the data of interest rather than a reference to the data.=C2=A0 Here is the updated material for your=C2=A0 consideration: Resource Discovery Discovery services are vital to the data architecture.=C2=A0 The data services may use the discovery services not just for registering services themselves, but also for registering the data sets that are stored by those services. This requires languages or ontologies for describing data. Discovery services may also register the locations of schema definitions. Discovery services may be built upon metadata repositories that contain information about other entities in the grid such as resources, and services.=C2=A0 Some discovery services may return the name of the service and some may return an EPR to the service.=C2=A0 Some discovery services may ta= ke a description of the desired data as input and return the data itself. Allen

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GGF-17 Session Request...
by Allen Luniewski 15 Mar '06

15 Mar '06

... has been submitted. I asked for one session of 90 minutes duration. I described the session as a combination of a status update and a working session to discuss architectural issues. Allen

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Discovery Service - Returning Data
by Allen Luniewski 15 Mar '06

15 Mar '06

At today's call, I took on an action to update the discovery service section to allow for discovery services that returned the data of interest rather than a reference to the data. Here is the updated material for your consideration: Resource Discovery Discovery services are vital to the data architecture. The data services may use the discovery services not just for registering services themselves, but also for registering the data sets that are stored by those services. This requires languages or ontologies for describing data. Discovery services may also register the locations of schema definitions. Discovery services may be built upon metadata repositories that contain information about other entities in the grid such as resources, and services. Some discovery services may return the name of the service and some may return an EPR to the service. Some discovery services may take a description of the desired data as input and return the data itself. Allen

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Draft telcon agenda for 15th March
by Dave Berry 13 Mar '06

13 Mar '06

The next teleconference of the OGSA Data Architecture working group will be held on Wednesday, March 15th, 2006 at the usual time of 8:00am Pacific / 11:00am Eastern / 4:00pm UK / 5:00pm Europe. We have several topics to discuss over the next few weeks, including: 0. GGF16 review 1. Review of latest data arch doc. 2. Interfaces for arch doc. 3. Interfaces for scenarios doc. 4. Relationship with SRM (GSM-WG) 5. New GFS scenario. 6. New Provenance scenario. 7. GGF17 planning 8. Discussion of DAIS (and ByteIO?) specs - and comments 9. Metadata catalog scenario & services (cf. SRB) 10. Review of (final?) arch doc. 11. Review of (final?) scenarios doc. In this telcon we will report back from GGF16 and schedule the remaining tasks. Please also contribute your ideas and suggestions. Here is the teleconference information: UK dialin: 0845 245 0224 US dialin: 1 866 838 0046 Intl dialin: +44 1452 542309 Passcode: 275359 Draft agenda for the March 15th teleconference: 1) Early discussion (5 minutes) Note taker assignment Roll call Minutes Approval ((http://tinyurl.com/o935n)) Agenda bashing 2) Action report (5 minutes) - Dave to forward old message about interface description. - Dave to mail Reagan re SRB. - Dave to raise the question of URIs for data formats (etc) at the GGF16 data area meeting. - Stephen to add a paragraph to the architecture document about reasons for naming, if still needed after Allen's revisions. - Stephen to add interface names to the scenario diagrams. - Ann to check the Access section for suitability for file replication. - Neil to update 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) GGF16 Report (20 minutes) Our session 1: presentation of status & responses Our session 2: Grid File Systems, provenance Other sessions of note OGSA F2F meeting 4) Progress & planning (25 minutes) Topics for next meetings Schedule for document writing Links with other WGs 5) Wrap up (5 minutes) AOB DONM Dave Berry Deputy Director, Research & E-infrastructure Development National e-Science Centre, 15 South College Street Edinburgh, EH8 9AA +44 131 651 4039

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RE: No telcon this week
by Dave Berry 06 Mar '06

06 Mar '06

All, I've just learnt that I won't be available for the telcon this week. If people want to meet without me, do go ahead. The number is the same as before: 8:00am Pacific / 11:00am Eastern / 4:00pm UK / 5:00pm Europe. UK dialin: 0845 245 0224 US dialin: 1 866 838 0046 Intl dialin: +44 1452 542309 Passcode: 275359 Dave. -----Original Message----- From: Dave Berry Sent: 27 February 2006 17:44 To: ogsa-d-wg(a)gridforum.org Subject: No telcon this week Please note that there will not be an OGSA Data WG telcon this week. We are preparing topics for future telcons. If you have any topics that you wish to raise, please contact Allen and myself. Best wishes, Dave Berry Deputy Director, Research & E-infrastructure Development National e-Science Centre, 15 South College Street Edinburgh, EH8 9AA +44 131 651 4039

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FW: grid interoperability now notes
by Dave Berry 01 Mar '06

01 Mar '06

All, These brief notes include the e-mail lists for discussions of grid interoperation. There is one for data: the experience might be relevant to our work - and hopefully vice versa! To subscribe to a list, mail majordomo(a)ggf.org with the "subscribe" command and the name of the list. Dave. -----Original Message----- From: Jennifer Schopf (ANL) Sent: 01 March 2006 10:00 To: Mark Parsons; Malcolm Atkinson; Peter Clarke; Dave Berry; David Fergusson Subject: grid interoperability now notes hey guys- i've written up notes from the grid interop meeting at GGF . Thought it might be useful to share - -jen Dr. Jennifer M. Schopf Scientist eInfrastructure Policy Advisor Distributed Systems Lab National eScience Centre and JISC Argonne National Laboratory The University of Edinburgh jms(a)mcs.anl.gov jms(a)nesc.ac.uk http://www.mcs.anl.gov/~jms http://homepages.nesc.ac.uk/~jms

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No telcon this week
by Dave Berry 27 Feb '06

27 Feb '06

Please note that there will not be an OGSA Data WG telcon this week. We are preparing topics for future telcons. If you have any topics that you wish to raise, please contact Allen and myself. Best wishes, Dave Berry Deputy Director, Research & E-infrastructure Development National e-Science Centre, 15 South College Street Edinburgh, EH8 9AA +44 131 651 4039

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Current draft of SRM specification
by Dave Berry 21 Feb '06

21 Feb '06

Followiinng Peter Kunszt's excellent presentation at GGF16, I asked the GSM co-chairs to point me at the current draft of their spec. Here is the info: "Please find the latest SRM spec from http://sdm.lbl.gov/srm-wg <http://sdm.lbl.gov/srm-wg> Latest working version is 2.1.1, and draft 3.0 is on the web that Peter presented in the GGF16. We're having a final draft in March. Let us know if you have any questions." Dave Berry Research Manager, National e-Science Centre 15 South College Street, Edinburgh, EH8 9AA Tel: +44 131 651 4039

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Telcon agenda for February 22nd - GGF report & progressing the architecture
by Dave Berry 20 Feb '06

20 Feb '06

The next teleconference of the OGSA Data Architecture working group will be held on Wednesday, February 20th, 2006 at the usual time of 8:00am Pacific / 11:00am Eastern / 4:00pm UK / 5:00pm Europe. In this telcon we will report back from GGF16. Note that I would like to schedule meetings to discuss integration with SRM & GFS, and further development of our replication and catalog sections. Please also contribute your ideas and suggestions. Here is the teleconference information: UK dialin: 0845 245 0224 US dialin: 1 866 838 0046 Intl dialin: +44 1452 542309 Passcode: 275359 Draft agenda for the February 22nd teleconference: 1) Early discussion (5 minutes) Note taker assignment Roll call Minutes Approval (http://tinyurl.com/o935n) Agenda bashing 2) Action report (5 minutes) - Dave to forward old message about interface description. - Dave to mail Reagan re SRB. - Dave to raise the question of URIs for data formats (etc) at the GGF16 data area meeting. - Stephen to add a paragraph to the architecture document about reasons for naming, if still needed after Allen's revisions. - Stephen to add interface names to the scenario diagrams. - Ann to check the Access section for suitability for file replication. - Neil to update 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) GGF16 Report (30 minutes) Our session 1: presentation of status & responses Our session 2: Grid File Systems, provenance Other sessions of note OGSA F2F meeting 4) Progress & planning update (15 minutes) Topics for next meetings Schedule for document writing Links with other WGs 5) Wrap up (5 minutes) Dave Berry Research Manager, National e-Science Centre 15 South College Street, Edinburgh, EH8 9AA Tel: +44 131 651 4039

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