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Time Constraints Profile
by Dominic Battre 10 Dec '09

10 Dec '09

Dear GRAAP members, we have seen in various discussions that there seems to be a frequent desire for a standardized term language to express when a service shall be delivered. Examples are: - Making a hardware reservation of a cluster for interactive use - Co-allocation of resources of various types (hardware, network, licenses, ...) - Defining a deadline for the completion of a job We have had a discussion about this in Banff after which Oliver and I have prepared a proposal for a Time Constraints Profile for WS-Agreement. This proposal has been uploaded here: https://forge.gridforum.org/sf/go/doc15832?nav=1 We would be eager to hear your comments. - Is the proposal clear? - Is the proposal complete? - Does the proposal satisfy your needs? Best regards, Dominic

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RV: Time Constraints Profile
by Carlos Müller Cejás 10 Dec '09

10 Dec '09

Hello Costas and Dominic, I am Carlos Müller (University of Seville) we have been working in proposals with WS-Agreement since 2007 and after reading your emails, I think that you may find interesting our proposal to extend the temporal-awareness of WS-Agreement presented at the International Conference on Service Oriented Computing celebrated (Vienna, Austria, 2007). In such work we proposed a DSL or an XML schema (showed as an UML class diagram) to specify any kind of validity period disjoint or not, and periodical or not. Moreover, we give a concrete way to include such validity periods for any agreement element of a WS-Agreement document by using the extension points of WS-Agreement specification. You can take the paper and the XML schema from http://www.isa.us.es/wsag/, in the section "TEMPORAL-AWARE WS-AGREEMENT", which is the first button above. If you have any question or comment, please feel free to contact me by my email, phone or even by this list (I have just joined few minutes ago because a colleague has said to me the discussion of this topic). Best Regards. Carlos Müller cmuller(a)us.es University of Seville. (+34 954 553 868) (+34 609 865 920) mobile phone ---------- Forwarded message ---------- From: Dominic Battre <mailinglists(a)battre.de> Date: Thu, Dec 10, 2009 at 7:13 PM Subject: Re: [GRAAP-WG] Time Constraints Profile To: "Constantinos (Costas) Kotsokalis" <ckotso(a)admin.grnet.gr> Cc: GRAAP-WG <graap-wg(a)gridforum.org> Hello Costas, I thought about this for time. My point of view is the following: I can use my calendar application and define appointments for "every day from now until next Friday, 9am-5pm". After entering this appointment and going to the calendar view, I see one appointment each day. So "every day from now until next Friday, 9am-5pm" was just an intensional description of what can be expressed by an extensional description as well (see http://en.wikipedia.org/wiki/Intensional_definition) So what are the advantages and disadvantages of an intensional description? 1) Positive: compact representation 2) Negative: difficult to model, negotiate and evaluate adherence 3) Positive: can be used to model infinite number of repetitions (every day until the end of the world) I think that 3) has no real usecase as contracts should contain a well defined end. Considering 1) and 2) I am still in favor of the extensional description. "every day from now until next Friday, 9am-5pm" becomes just "2009/12/10 9am-5pm, 2009/12/11 9am-5pm, ..., 2009/12/18 9am-5pm". When the user enters an SLA its GUI can still present "every day from now until next Friday, 9am-5pm" but just render it as an extensional set. Each individual time frame could be modeled as one SDT+GT. I think the extensional description has the same expressiveness (as mentioned, I don't see 3) as a usecase for us) but is easier to handle and creates a leaner specification. Best regards, Dominic On 12/07/2009 05:17 PM, Constantinos (Costas) Kotsokalis wrote: > Hi Dominic, > > Recurring patterns for service usage is something that is needed in many > cases, even if not allowed by current technology/service providers. In > an example scenario where someone rents VMs to execute enterprise > operations s/w on them, (s)he would certainly prefer to load-balance > over a number of them available during working hours, and half or less > that number outside working hours, to save money. I know this is not > something that current cloud providers offer (to the extent I'm aware > of, at least) but I believe it's a realistic need, and fits with fully > dynamic scaling scenarios. > > On the same time, I do agree that it increases complexity, especially if > one is willing to include constructs such as "on the first Monday of > every month" etc. > > Just my E0.02. > > Best regards, > > Costas > > > On 7 Dec 2009, at 14:39, Dominic Battre wrote: > >> Hello Costas, >> >> it would certainly be a possible extension. >> >> The question is do we want it? If we end up translating ical to XML we >> come to a specification that is extremely powerful but very difficult >> to implement. >> >> Our idea was to use the simplest language that would be useful. >> Therefore, I would like to ask you and the others: Do you need >> something like "every day, 9am-5pm"? >> >> Best regards, >> >> Dominic >> >> Constantinos (Costas) Kotsokalis wrote: >>> Hi Dominic, >>> Would you see fit to augment this also with some construct for >>> defining periodic durations? E.g. to be able to say "every day, >>> 9am-5pm", or things like that. >>> Best regards, >>> Costas >>> On 7 Dec 2009, at 13:43, Dominic Battre wrote: >>>> Dear GRAAP members, >>>> >>>> we have seen in various discussions that there seems to be a frequent >>>> desire for a standardized term language to express when a service shall >>>> be delivered. >>>> >>>> Examples are: >>>> >>>> - Making a hardware reservation of a cluster for interactive use >>>> >>>> - Co-allocation of resources of various types (hardware, network, >>>> licenses, ...) >>>> >>>> - Defining a deadline for the completion of a job >>>> >>>> We have had a discussion about this in Banff after which Oliver and I >>>> have prepared a proposal for a Time Constraints Profile for >>>> WS-Agreement. This proposal has been uploaded here: >>>> >>>> https://forge.gridforum.org/sf/go/doc15832?nav=1 >>>> >>>> We would be eager to hear your comments. >>>> >>>> - Is the proposal clear? >>>> >>>> - Is the proposal complete? >>>> >>>> - Does the proposal satisfy your needs? >>>> >>>> Best regards, >>>> >>>> Dominic >>>> -- >>>> graap-wg mailing list >>>> graap-wg(a)ogf.org >>>> http://www.ogf.org/mailman/listinfo/graap-wg >> > > -- graap-wg mailing list graap-wg(a)ogf.org http://www.ogf.org/mailman/listinfo/graap-wg

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OGF 27 Minutes and Status Quo
by Philipp Wieder 13 Nov '09

13 Nov '09

Dear All, please find the minutes from OGF 27 here [1]. I would like to thank all participants for the intense discussion (which even resulted in scheduling a fourth session). The public comment period of our WS-Agreement document has ended. The document and the comments can be found here [2]. We will address the comments asap and return the document to the OGF editorial process. Last but not least we (finally) make good progress regarding the specification of the WS-Agreement Negotiation specification. Based on the discussion at OGF 27 we had this Tuesday an informal meeting in Sankt Augusin, Germany. I would say we converge. The upated material will be published soon. We also have two stakeholders, the SmartLM [3] and the SLA4D-Grid [4] projects, which support specification and implementation of the (draft) specification. More soon ... Best regards, Philipp. [1] http://forge.gridforum.org/sf/go/doc15811?nav=1 [2] http://www.ogf.org/gf/docs/?archived [3] http://www.smartlm.org/ [4] http://www.sla4d-grid.de/

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WS-Agreement experience document in public comment now
by Wolfgang Ziegler 02 Oct '09

02 Oct '09

Dear GRAAPians, as the subject says the WS-Agreement experience document has finally found its way to the public comments web-page http://www.ogf.org/gf/docs/?public_comment The deadline for comments is October 30, please take the opportunity to review and comment this document. Don't forget that not only comments proposing modifications are welcome but comments saying this document is fine are also useful. This is one of the final steps before WS-Agreement can transition from a proposed recommendation to a full recommendation. Given the wide range of implementations and public awareness the spec has already achieved this transition is actually overdue ;-) Hope to meet many of you in two weeks in Banff where we probably will have already received first comments. Best regards Wolfgang -- 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 SmartLM - Software License Technology for Grids, Clouds, SOA: www.smartlm.eu CoreGRID Network of Excellence www.coregrid.net Institute on Resource Management and Scheduling www.coregrid.net/irms

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Final version of the experience document and last call
by Wolfgang Ziegler 31 Aug '09

31 Aug '09

Dear GRAAPians, the last editing is now finished and the experience document is ready to be submitted to the OGF editor to enter the public comment period. The last version can be found in the GRAAP gridforge space: https://forge.gridforum.org/sf/docman/do/downloadDocument/projects.graap-wg… Before submission the working group has one week time to send last comments to be considered before submission to the OGF editor. Please send you comments before Tuesday, September 8. Best regards Wolfgang -- 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 SmartLM - Software License Technology for Grids, Clouds, SOA: www.smartlm.eu CoreGRID Network of Excellence www.coregrid.net Institute on Resource Management and Scheduling www.coregrid.net/irms

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GRAAP sessions at OGF 27
by Wolfgang Ziegler 27 Aug '09

27 Aug '09

Dear GRAAPians, as promised here my proposal for 3 sessions during OGF 27 Session#1 State of the WG Activities since last OGF State of the Experience Document Presentation of the SmartLM implementation Discussion Session#2 Presentation(s) Discussion of Negotiation and re-Negotiation Work on Negotiation Session#3 Work on the Negotiation specification Assignment of contributions Planning until OGF 28 Please let me know - whether you want to add/remove something to/from the agenda or modify the sequence - if you are interested in presenting own work on negotiation and/or re-negotiation which you feel should be included into the OGF specification The deadline for session requests is tomorrow (August 28). Thus, please send your comments before tomorrow 14:00 CST. Best regards Wolfgang -- 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 SmartLM - Software License Technology for Grids, Clouds, SOA: www.smartlm.eu CoreGRID Network of Excellence www.coregrid.net Institute on Resource Management and Scheduling www.coregrid.net/irms

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Group status update
by Wolfgang Ziegler 21 Aug '09

21 Aug '09

Dear GRAAPians, as the next OGF meeting in Banff is approaching I take the opportunity to update you on the status of the WG. First of all the experience document is almost complete, please check out the document here https://forge.gridforum.org/sf/docman/do/downloadDocument/projects.graap-wg… and comment. It needs a bit of editorial polishing and then it will be sent to the list again for a last call for comments. Our objective is to send it to the OGF editor before the next OGF. We expect WS-Agreement to become a full recommendation of the OGF by end the year. Thanks again to all who contributed to the document. The second point is the further work on adding negotiation and re-negotiation capabilities to the WS-Agreement spec v1.0. We made some progress on this during the last OGF and between and already have an implementation for the proposed negotiation extension. This will be presented at OGF in Banff. Philipp is currently working on putting a GFD together with the proposed extensions, more to come. Third, we plan 3 GRAAP-WG sessions in Banff, all with a focus on the planned negotiation and re-negotiation extensions. I will send a proposal for the sessions next week and also request the sessions end of next week. Finally, I am about to change our living charter to better reflect the current activities towards negotiation. Best regards Wolfgang -- 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 SmartLM - Software License Technology for Grids, Clouds, SOA: www.smartlm.eu CoreGRID Network of Excellence www.coregrid.net Institute on Resource Management and Scheduling www.coregrid.net/irms

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OGF 26 session
by Philipp Wieder 29 May '09

29 May '09

Dear GRAAP members, please find the minutes and a number of slides from the GRAAP session at Chapel Hill here: http://forge.ogf.org/sf/go/projects.graap-wg/docman.root.meeting_materials_…. We have a number of document work and actions. For that, we will set up tasks on GridForge and contact the responsible persons. Best regards, Philipp.

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Call for Papers: Service Level Agreements in Grids Workshop 2009
by Wolfgang Ziegler 09 May '09

09 May '09

Dear GRAAPians, as in the previous years we are organising the annual SLA in Grids Workshop as part of the IEEE Grid conferences. This year Grid 2009 will he co-located with OGF27 in Banff, which allows to participate in both events without additional travel effort and expenses. Please consider submitting a paper to the workshop and distribute this call among your colleagues. Accepted papers will be published in the CoreGRID Springer Series. Thanks & best regards Wolfgang -- 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 SmartLM - Software License Technology for Grids, Clouds, SOA: www.smartlm.eu CoreGRID Network of Excellence www.coregrid.net Institute on Resource Management and Scheduling www.coregrid.net/irms -------------------------------------------------------------------------------- Call for Papers Service Level Agreements in Grids Workshop October 13, 2009 Banff, Canada http://www.coregrid.net/mambo/content/view/786/1/ to be held in conjunction with The 10th IEEE International Conference on Grid Computing (Grid 2009) October 13 - 15, 2009 Banff, Canada http://www.grid2009.org/ -------------------------------------------------------------------------------- DESCRIPTION As Grids and service-oriented architectures evolved to a common 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. There is a clear trend to use electronic contracts between service consumers and one or more service providers, in order to achieve the necessary reliability and commitment on both sides. Service Level Agreements (SLAs) are the means to model and manage such contracts in a unified way. This workshop will provide a forum to present current research and up-to-date solutions from research and business communities. The workshop considers Grids but also generic models for SLA management. That is, market-economic strategies, negotiation, or monitoring are also of interest. TOPICS OF INTEREST Topics of interest for the 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 * Negotiation and agreement protocols and strategies * 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 * Monitoring, provisioning, enforcement of SLAs PROCEEDINGS Accepted papers will be published in the CoreGRID Springer Series. 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-workshop2009(a)scai.fraunhofer.de. All papers will be peer reviewed and the comments will be provided to the authors. IMPORTANT DATES Submissions due: July 26, 2009 Notification of acceptance: August 24, 2009 Camera Ready: September 30, 2009 Workshop: October 13, 2009 PROGRAM CHAIRS Philipp Wieder, Dortmund University of Technology, Germany Ramin Yahyapour, Dortmund University of Technology, Germany Wolfgang Ziegler, Fraunhofer Institute SCAI, Germany PROGRAM COMMITTEE Christiana Amza, University of Toronto, Canada Dominic Battré, TU Berlin, Germany Frances Brazier, Vrije University, Amsterdam, The Netherlands Asit Dan, IBM, US Wolfgang Gentzsch, DEISA, Germany Liviu Joita, Cardiff University, UK Bastian Koller, HLRS, Stuttgart, Germany Ioannis Kotsiopoulos, University of Manchester, UK Gregor von Laszewski, Rochester Institute of Technology, US Heiko Ludwig, IBM, US Toshi Nakata, NEC Research, Japan Julian Padget, Bath University, UK Shamima Paurobally, University of Westminster, London, UK Thomas Quillinan, VU University Amsterdam Omer Rana, Cardiff University, GB Igor Rosenberg, ATOS Origin, Spain Rizos Sakellariou, University of Manchester, UK 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 send an email to sla-workshop2009(a)scai.fraunhofer.de Information about registration, accommodation and other relevant information regarding the Grid 2009 conference can be found at http://www.grid2009.org/.

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FW: Announcing Grid Voices, a new blog from European research leaders brought to you by Gridipedia
by Igor Rosenberg 16 Mar '09

16 Mar '09

An announcement on a new blog... Dear all, (Apologies for cross posting) Gridipedia is pleased to announce the launch of a new blog, Grid Voices, to be hosted on www.Gridipedia.eu. This blog will be written by prominent members of the European Grid, Service oriented and Cloud computing areas, from both industry and academic institutions. The blog will focus on Grids, clouds, and related technologies, in particular in reference to their commercial use and exploitation. It can be found at www.gridipedia.eu/grid_voices.html. Today we have published our first post. From Stefan Wesner, Deputy Director of Stuttgart's High Performance Computing Centre, it focuses on key limitations of Cloud from the perspective of the BEinGRID research initiative. We have a publication schedule that anticipates a new post approximately every two weeks. Next week's post will be written by Theo Dimitrakos, Research Group Leader at BT. He will be followed by Professor Varvarigou from the National Technical University of Athens. Please forward this message to your contacts and colleagues. I believe it will offer valuable insight from the heart of the European "Grid Scene". The blog will shortly be hosted by Wordpress software so comments will become enabled, and at Gridipedia we hope that this can become the centre of a lively online community. Sincerely, Daniel Field Atos Origin Research and Innovation Avda. Diagonal 200 08018 Barcelona, Spain Tel: +34 93 486 1818 fax: +34 93 486 0766 SKYPE : daniel_field www.atosresearch.eu <http://www.atosresearch.eu/> ------------------------------------------------------------------ This e-mail and the documents attached are confidential and intended solely for the addressee; it may also be privileged. If you receive this e-mail in error, please notify the sender immediately and destroy it. As its integrity cannot be secured on the Internet, the Atos Origin group liability cannot be triggered for the message content. Although the sender endeavours to maintain a computer virus-free network, the sender does not warrant that this transmission is virus-free and will not be liable for any damages resulting from any virus transmitted. Este mensaje y los ficheros adjuntos pueden contener informacion confidencial destinada solamente a la(s) persona(s) mencionadas anteriormente pueden estar protegidos por secreto profesional. Si usted recibe este correo electronico por error, gracias por informar inmediatamente al remitente y destruir el mensaje. Al no estar asegurada la integridad de este mensaje sobre la red, Atos Origin no se hace responsable por su contenido. Su contenido no constituye ningun compromiso para el grupo Atos Origin, salvo ratificacion escrita por ambas partes. Aunque se esfuerza al maximo por mantener su red libre de virus, el emisor no puede garantizar nada al respecto y no sera responsable de cualesquiera danos que puedan resultar de una transmision de virus. ------------------------------------------------------------------

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