March 2009 - graap-wg - lists.ogf.org

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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OGF 25 session outcome
by Wolfgang Ziegler 11 Mar '09

11 Mar '09

Dear GRAAPians we had two productive sessions at OGF 25 in Catania last week. The slides of the two sessions have been uploaded to the gridforge space of GRAAP along with the minutes and a presentation of "A lightweight annotation approach of WS-Agreement based specifications" which was given by Ioannis Kotsiopoulos. We continued the work on the experience document, the next draft version taking into account the recommendations and requests of the GFSG will be available soon. We also continued the discussion of the negotiation. Based on the outcome of OGF 24 a first prototype implementation was presented. Since a number of the participants will meet again in Dagstuhl in two weeks for a seminar on SLAs we decided to have two half day work group meetings there to finalise the experience document and the initial document on negotiation. I attach the minutes of the two sessions to this mail for your convenience. 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 Grid Resource Allocation Agreement Working Group (GRAAP-WG) Session minutes OGF 25 March 2-6, 2009 Catania, Italy Minute taker: Dominic Battré GRAAP Session #1: Experience Document ------------------------------------- [Details: see slides on GridForge [1]] - Progress since last OGF - sent survey to various projects, received 7 replies - had discussions about negotiation on top of WS-Agreement and decided not to wait for WS-Agreement version 2 but create extension that allows multi-round negotiation without breaking compatibility -> need extension of states but that does not break compliance to WS-Agreement - Experience document - presentation of structure of document (see GridForge [2]) - Open issues -> who will work on what? - Rationale for writing the document: Oliver, Wolfgang - Some project descriptions currently blank, Dominic will check whether questionnaires provide sufficient input. Otherwise fall back to the people specified below: - Akogrimo (Bastian Koller) -> fill questionnaire - BREIN (Bastian) - BEinGRID BEs (Igor) - JSS - SmartLM (Oliver & Wolfgang) - Section about generic WS-Agreement frameworks -> coordinated by Dominic -> write for each framework: - dependencies (middleware stack, specifications) - ... - Wolfgang will pass list of items to Dominic & Oliver for completion and generation of questionnaire - forward questionnaire to - WSAG4J -> Oliver - BREIN framework -> Bastian - NegMgr -> Dominic - see below - Section about interoperation Testing -> Dominic & Oliver -> coordinated by Oliver - Comments from Projects taken from survey -> Dominic - Suggestion for new section: add analysis, which parts are used by implementations and which parts are not used -> Igor - Further procedure: first we generate a beta version of the document, then circulate to everybody who gave input (for updates/changes) - input from GFSG regarding interoperability demonstration: - Need true interoperability of two independent code bases -> Both use same template - Issue: Hosting environments incompatible - adapters are ok to circumvent incompatibilities of hosting environments -> demonstration will be job submission with best effort jobs - we will include an interoperable template in experience document, afterwards we will write a new document discussing various use cases and interoperability - Discussion on "WS-Agreement Frameworks" section in experience document - have created list of criteria -> Wolfgang sends this to Oliver & Dominic for another iteration - possible answers to several questions will be: "automatically handled by framework", "can be implemented in domain specific implementation", "not supported" - Should we found a new group for Negotiation? -> no, just add an extension since Negotiation is based on WS-Agreement 1.0 and only requires small changes resulting in WS-Agreement 1.1 - update Charta to include Negotiation (Wolfgang) - GFSG expressed desire to specify term languages (eg. for Advance Reservation) - Some topics shall be addressed at SLA Workshop in Dagstuhl: - 1/2 day on Microspec for advanced reservation as JSDL Extension (WSDL files), will be passed to JSDL working groups - 1/2 day on negotiation (definition of WSDL files) - Presentation by Ioannis Kotsiopoulos, UoM - SLA terms/metrics/... for domains are NOT specified in WS-Agreement -> Proposal of semantic annotation - semantic annotation = reference to ontology - provides semantic interoperability - no need to change WS-Agreement - Annotation by SAWSDL, is backwards compatible - tools: SASLA4j library - Comments: very interesting, might fit well into metrics of WS-Agreement GRAAP Session #2: Negotiation ------------------------------------- - Implementation for Negotiation exists for SmartLM based on WSAG4J framework - started with negotiation - will be extended to re-negotiation - see slides for details - legal issues need to be discussed (how long is old agreement valid in case of renegotiation) - discussion: - during iterations of negotiation the creation constraints remain the same - is the document passed during the negotiation and the template really the same? -> seems ok - should negotiate be allowed to return >1 template at a time? - yes, simpler for a client to handle this - should negotiate accept >1 template as parameter? - no, user can send several requests sequentially. Advantage: easier for the agreement responder to find out what the agreement initiator wants. -> requests to change: - NegotiateOutputType: - minOccurs="0" - maxOccurs="unbound" - superseding state missing - will be added -> Oliver + Wolfgang - How do we address PendingAgreementFactories? - First ignore this, then ask for input on first version of WSDL files from GRAAP mailing list and work on PendingAgreementFactory in parallel - Do we need an exception for the provider to tell that it is not willing to renegotiate any further? -> No, WS-Agreement has too limited exception features, needs a general overhaul there as well -> it could be put in the final agreement ("this is the last offered agreement") - Usecases for validation of (re-)negotiation: - Graceful termination - Service Responder wants to make changes - Service Initiator wants to make changes - Broker Scenario (broker collects offers) - quote is accepted/rejected / no quote generated - maybe more in wiki - is an extension of agreement context needed? - tracking quotes? - superseding of agreements - maybe, Oliver creates proposal -> proposal of document ready by SLA workshop in Dagstuhl (Oliver & Wolfgang) GRAAP Session #3: ----------------- cancelled

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WS-Agreement Veriosn 1.0 experience document
by Philipp Wieder 04 Mar '09

04 Mar '09

Dear All, please find the first draft of the WS-Agreement experiment document at GridForge [1] (thanks Dominic for starting and pushing, thanks Wolfgang for your input, thanks all projects for implementing and feedback). We got some last minute additions from the BEinGRID project (thanks Igor), which also can be found at GridForge [2]. Wolfgang will discuss the document tomorrow at the session(s) and we will try to publish it asap, which, I guess, is not only in the group's interest. Best regards, Philipp. [1] http://forge.gridforum.org/sf/go/doc15550?nav=1 [2] http://forge.gridforum.org/sf/docman/do/listDocuments/projects.graap-wg/doc…

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OGF: SLA framework
by Igor Rosenberg 02 Mar '09

02 Mar '09

Hello GRAAP group, Within the EU BeinGrid project (beingrid.eu), we've been developing an SLA framework for GT4. It is based on a component architecture (by this, understand independent modules). I have some material that describes it that I could pass to the community, including a paper (attached). Implementation of the different components is finished (nearly all components are licensed as Apache V2, only one is freeware binary), and we're currently making sure it all integrates smoothly. I think it should be advertised to the OGF community (at least the guys and girls interested in GT4). I also propose that from the work done, we could try to standardize the SLA frameworks that exist for Grids (GRIA, GRASP, Unicore, and now GT4); btw our framework is based on the March 2007 WS-Agreement specification of the OGF, which describes SLA contracts (www.ogf.org/documents/GFD.107.pdf) but is meant to be generic (different SLA formats can be plugged in) . What would be the way forward? Who should I get in touch with? Regards Igor Rosenberg, Research Engineer, Atos Origin, Spain ------------------------------------------------------------------ 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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