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telecon on 3/14
by Jim Pruyne 14 Mar '07

14 Mar '07

All, We're scheduled for our next telecon on March 14. The US has changed to daylight savings time, but for this first meeting I will strive to keep the times the same in other countries. Therefore, the times in the US will be one hour later, and I hope that means that the time will be the usual outside the US. The times are as follows: 10:00AM Central Standard Time US (GMT-0500) which should be: 11:00AM Eastern Standard Time US 1600 Germany(?) 0000 Japan ALSO, the dial-in numbers have seemingly changed again. You should now use: Toll number: 8324452343 Toll free number: 8664809967 Conference code: 8578310 And, finally, after all of the confusion, the good news. I believe I have the final draft of WS-Agreement. It can be found at: http://forge.gridforum.org/sf/docman/do/downloadDocument/projects.graap-wg/… (sorry for the long URL). If we have no complaints during this telecon, I'll submit it right afterward. Best, --- Jim

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First call for papers: Usage of Service Level Agreements in Grids Workshop
by Wolfgang Ziegler 09 Mar '07

09 Mar '07

******************************************************************* We apologize if you received multiple copies of this posting. Please feel free to distribute it to those who might be interested. ******************************************************************* -------------------------------------------------------------------------------- Call for Papers Usage of Service Level Agreements in Grids Workshop Austin, Texas, USA, September 19, 2007 http://www.coregrid.net/sla-workshop2007/ to be held in conjunction with The 8th IEEE International Conference on Grid Computing (Grid 2007) Austin, Texas, USA, September 19 – 21, 2007 -------------------------------------------------------------------------------- DESCRIPTION As the Grid evolves to become an infrastructure for providing and consuming services in research and commercial environments, mechanisms are needed to agree on the objectives and the quality of such service provision. This could be facilitated by means of electronic contracts between service consumers and one or more service providers, in order to achieve the necessary reliability and commitment on both sides. Such contracts help to establish a well-defined relationship between a service provider and a client in the context of a particular service provision. This is especially important if the services or resources to be used come from different administrative domains, or if commercial service provision needs to be supported. Service Level Agreements (SLAs) are a promising approach to establishing these kinds of guarantees and relationships. This workshop will provide a forum to present current research and up-to-date solutions from research and business communities. TOPICS OF INTEREST Topics of interest for the Usage of Service Level Agreement in Grids workshop include but are not limited to: * Areas benefiting from SLAs * Languages to express SLAs (e.g. SLOs, BLOs, QoS, Guarantees, Penalties) * Protocols to conclude and negotiate SLAs * Technologies for management and observation of SLAs * Static vs. Dynamic SLAs * Business models & Grid economy * Validation techniques for SLA parameters * Comparison and matchmaking of SLA and policy descriptions * Managing user expectations via SLAs * Multi-party SLAs and SLA chaining * SLA-based resource discovery, co-scheduling and resource reservation * Registry Services and repositories for SLA * SLA-based trust management including VOs PROCEEDINGS Accepted papers will be published in the CoreGRID Springer Series. For more information regarding paper format and style please visit the author's instruction link at http://www.coregrid.net/mambo/content/view/360/332. PAPER SUBMISSIONS Authors are invited to submit manuscripts reporting original unpublished research and recent developments on the topics of interest. Submitted papers should be formatted according to the CoreGRID Springer style format (please see http://www.coregrid.net/mambo/content/view/360/332) and should not exceed 10 pages including figures and references. Papers should be submitted electronically in PDF format by sending it as an e-mail attachment to sla-workshop2007(a)fz-juelich.de. All papers will be peer reviewed and the comments will be provided to the authors. IMPORTANT DATES Submissions due: June 10, 2007 Notifications of acceptance: August 3, 2007 Camera ready version due: August 31, 2007 Workshop: September 19, 2007 PROGRAM CHAIRS Omer Rana, University of Cardiff, UK Philipp Wieder, Research Centre Jülich, Germany Ramin Yahyapour, University of Dortmund, Germany Wolfgang Ziegler, Fraunhofer Institute SCAI, Germany PROGRAM COMMITTEE Christiana Amza, University of Toronto, Canada Francis Brazier, Vrije University, Amsterdam, The Netherlands Wolfgang Gentzsch, D-Grid, Germany Michael Gerndt, TUM Munich, Germany Liviu Joita, Cardiff University, UK Bastian Koller, HLRS, Stuttgart, Germany Heiko Ludwig, IBM, USA Toshi Nakata, NEC Research, Japan Benno Overeinder, Vrije University, Amsterdam, The Netherlands Julian Padget, Bath University, UK Shamima Paurobally, University of Liverpool, UK Rizos Sakellariou, University of Manchester, UK Amit Sheth, University of Georgia, US Achim Streit, Research Center Jülich, Germany Luigi Telesca, Create-Net, Italy Daniel Veit, University of Mannheim, Germany Oliver Wäldrich, Fraunhofer Institute SCAI, Germany Steven Willmott, UPC, Barcelona, Spain ADDITIONAL INFORMATION For further information please send an e-mail to sla-workshop2007(a)fz-juelich.de. Information about registration, accommodation and other relevant information regarding the Grid 2007 conference can be found at http://www.grid2007.org/. -- Wolfgang Ziegler www.scai.fraunhofer.de/ziegler.html Fraunhofer-Institute for Algorithms and Scientific Computing (SCAI) Schloss Birlinghoven, D-53754 Sankt Augustin, Germany Tel: +49 2241 14 2258; Fax: +49 2241 14 42258 CoreGRID Network of Excellence www.coregrid.net Collaboration Gateway www.coregrid.net/cg Institute on Resource Management and Scheduling www.coregrid.net/irms

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telecon on 2/28
by Jim Pruyne 28 Feb '07

28 Feb '07

All, We're scheduled for our next telecon on Feb. 28 at the usual time and numbers. Call details are as follows: 9:00AM Central Standard Time US (GMT-0600) which should be: 10:00AM Eastern Standard Time US 1500 UK(?) 1600 Germany(?) 0000 Japan Phone Number: 866-480-9967 in the US. 832-445-2343 for those outside the US. Conference code #8578310.

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SLA Template
by Dominic Battre 20 Feb '07

20 Feb '07

Hello everybody, for the AssessGrid project, we are working on SLA support for our resource management system. At the very moment, I am in the stage of generating an extensive SLA template to get a good feeling about the current WSAG specification. (I didn't follow the development for some time because I was busy with other projects). I would like to send you my results for comment once they are available, but right now I have encountered the first problem already. Maybe you can help me with this: I would like to add a CreationConstraint that models a boolean flag, whether some fault tolerance mechanisms need to be activated. The respective XML fragment looks like this: <wsag:Item wsag:Name="Checkpointing"> <wsag:Location>//assessgrid:FTService/assessgrid:Requested</wsag:Location> <wsag:ItemConstraint>  </wsag:ItemConstraint> </wsag:Item> So what do I put there to allow only true and false? My first idea was to use a xs:restriction like <xs:restriction base="xs:string"> <xs:enumeration value="true"/> <xs:enumeration value="false"/> </xs:restriction> but to my surprise my editor (WTP of Eclipse) tells me that xs:restriction is not a valid tag at this place - despite being explicitly mentioned in the WSAG specification. Now, who is right? The syntax checker of the editor or the WSAG spec, or both, meaning that I am wrong? The error message is: cvc-complex-type.2.4.a: Invalid content was found starting with element 'xs:restriction'. One of '{"http://www.w3.org/2001/XMLSchema":simpleType, "http://www.w3.org/2001/XMLSchema":minExclusive, "http://www.w3.org/2001/XMLSchema":minInclusive, "http://www.w3.org/2001/XMLSchema":maxExclusive, "http://www.w3.org/2001/XMLSchema":maxInclusive, "http://www.w3.org/2001/XMLSchema":totalDigits, "http://www.w3.org/2001/XMLSchema":fractionDigits, "http://www.w3.org/2001/XMLSchema":length, "http://www.w3.org/2001/XMLSchema":minLength, "http://www.w3.org/2001/XMLSchema":maxLength, "http://www.w3.org/2001/XMLSchema":enumeration, "http://www.w3.org/2001/XMLSchema":whiteSpace, "http://www.w3.org/2001/XMLSchema":pattern, "http://www.w3.org/2001/XMLSchema":group, "http://www.w3.org/2001/XMLSchema":all, "http://www.w3.org/2001/XMLSchema":choice, "http://www.w3.org/2001/XMLSchema":sequence}' is expected. This matches mostly with the specification except for the xs:restriction. Coming back to the problem of modeling "Put true or false there", what would be the best way? If I understand the xs:group, xs:all, xs:choice, xs:sequence correctly, they all operate on complex types. Does this leave anything but the xs:pattern alternative? (Note that true/false is just a special case for any kind of enumeration.) Thanks, Dominic P.S. In case you have some example files of templates, I would be very interested in having a look at them.

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minutes from 2/14 telecon
by Jim Pruyne 14 Feb '07

14 Feb '07

Are attached. We'll meet again in two weeks. --- Jim Notes from Feb. 14 Teleconference --------------------------------- Attendees --------- Jim Pruyne Toshi Nakata Asit Dan Wolfgang Ziegler Agenda Items ------------ - OGF results there were two sessions: - First was on the comments we have addressed and discussion on faults. Area chairs were there and they agreed with what we've done based on the comments. Updated fault schema was sent to Jim to bring the schema in compliance with the rest of the text. Agreed that we then allow WG to review then on to the chairs for submission. The chairs are ready for all of this. Three implementations immediately presented and a few more also have some interest or experience. Those three will start having discussions on implementation on test: Cardiff, Julich, and Wolfgang's group. The first discussion is scheduled for Fri. Also, there's a RG working on interop. for scheduling systems and that plans to build on WS-Agreement. There were also discussions on updating the web page in grid-forge including links to the wiki. Next discussion was on use cases and starting with templates for creating the use cases. - Second session discussed scenarios to be documented and to be made an informational document, and that would be followed by an "experimental" document to present the results of the experiments. One question was to find out the state of cremonia(sp?) project. Asit lets us know this is not actively being developed any more. Looking for use case from industrial domain. There was a BoF on a negotiation profile. Wolfgang was unable to attend, so he doesn't know what happened here. - We still have open discussion on issue 6 from Toshi's spreadsheet (sent on 1/18/07). This is on multiple value's for a single penalty. Asit is not completely clear on the use case for this. Jim feels that if we cannot agree now, we should defer this until a next version if there is interest at that time.

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telecon on 2/14
by Jim Pruyne 14 Feb '07

14 Feb '07

All, We're scheduled for our next telecon on Feb. 14 at the usual time and numbers. We should get an update on the last OGF meeting and the state of the spec. Call details are as follows: 9:00AM Central Standard Time US (GMT-0600) which should be: 10:00AM Eastern Standard Time US 1500 UK(?) 1600 Germany(?) 0000 Japan Phone Number: 866-480-9967 in the US. 832-445-2343 for those outside the US. Conference code #8578310.

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Evaluation of Service Level Specifications
by Tobias Pontz 12 Feb '07

12 Feb '07

Hello all, I'm writing my diploma thesis at the moment in comparing different Service Level Specifications (like WS-Agreement, WSLA, MNM Service Modell, WSMN, WSOL, ...). I decided to create a catalogue of requirements. Here is the structure: - abstract requirements - searching and finding - specification language - SLA-negotiation - modelling SL parameter - measuring and monitoring Now I'm looking for some criteria for every named point (e.g. searching/finding: centralized/decentralized directory; modelling: bottom-up/top-down). What do you think are important criteria? Did I forget something? Did I forget an important specification? Do you know about comparable workings? Thanks Tobias

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minutes from 1/17 telecon
by Jim Pruyne 25 Jan '07

25 Jan '07

Are attached. The next telecon will come after OGF in North Carolina. --- Jim Minutes from the December 20, 2006 GRAAP Telecon Attendees --------- Jim Pruyne Toshi Nakata Wolfgang Ziegler Discussion ---------- Using Toshi's spreadsheet from 12/26/06 Comment 12: Update from Oliver will correct this issue. Cardinality change doesn't seem worth doing. Comment 13: Oliver has a different solution to the problem that Tiancho suggests, but it seems to be simpler and somewhat more general. Comment 14: It does look redundant. Jim will look in to this one based on the wsdl from Oliver. Comment 15: agreed. We'll use the more consistent naming that Tiancho proposes. Comment 20: Supporting WS-Notification would require too many changes at this point, so we will not do for WS-Agreement 1.0. Comment 21: General agreement is that it is ok for this to be an SDT, but there can be some confusion of SDT vs. service properties. Comment 22: Perhaps we agree with this, but due to time we do not expect to be able to improve upon it. It is an example, so it is non-normative text, so it does not effect the specification's real purpose. Wolfgang will send links to implementation details (including wsdl) which Jim can put in to the document. When this is complete, we'll let the mailing list know, and give a week or so for comments, and then re-submit as complete. We are making the organizational change to remove Volker as a co-chair, and to list Phillip now as Secretary for the group. Toshi will help Wolfgang with slides related to updates since the last GGF meeting for use at the next OGF/GGF meeting in North Carolina.

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WS-Agreement and/or WS-AgreementNegotiation implementations (preferably in Java)
by Jesus Movilla 24 Jan '07

24 Jan '07

Hi all, I am new at this mailing list: my name is Jesus M. Movilla and I am currently interesting in negotiation process with WS. I have seen some posts in this list related to implementation of WS-Agreement but unfortunately I could not reach the urls. Can anybody tell me it they are some implementations of WS-Agreement and/or WS-AgreementNegotiation. Thank you very much in advanced! Jesús

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Needs and requirements for Quality of Service in the Grid (BoF)
by A.S.McGough 23 Jan '07

23 Jan '07

All, At the last OGSA f2f meeting I was asked to arrange a BoF meeting at the next OGF meeting on Quality of Service. This has been arranged for OGF19 on Thursday afternoon at 4pm. I'd like to solicit support for this BoF in two forms. First of all requesting that people attend this BoF if they feel they have any interest in the area of QoS. The second is to seek people to present ideas at the BoF. The intention is to discover what if anything OGF should be doing about QoS. I'm keen for presentations on what people feel is needed for QoS and also people with existing solutions to the issue of QoS in the Grid. Please let me know if you have anything which may be suitable. Many thanks, steve.. -- ------------------------------------------------------------------------ Dr A. Stephen McGough http://www.doc.ic.ac.uk/~asm ------------------------------------------------------------------------ Technical Coordinator, London e-Science Centre, Imperial College London, Department of Computing, 180 Queen's Gate, London SW7 2BZ, UK tel: +44 (0)207-594-8409 fax: +44 (0)207-581-8024 ------------------------------------------------------------------------

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