March 2010 - saga-rg - lists.ogf.org

notes from the OGF28 session on 18/03, 16:00-17:30
by Thilo Kielmann 28 Apr '10

28 Apr '10

SAGA-WG session at OGF28, monday march 15, 2010, 16:00-17:30 session chaired by Andre Merkzy notes taken by Thilo Kielmann Due to a technical problem with the beamer, the session agenda was rearranged to start with a discussion on the white board. new agenda: 1. relation of SAGA with the Vine toolkit 2. the SAGA Core experience document 1. SAGA and Vine both have similar concepts (API abstracting from middleware and services, implementations with dynamic plugins/adaptors) There clearly is some conceptual overlap between both, so it was discussed how they could possibly be combined, or implementations be integrated. The outcome was that SAGA could be used to give Vine access to several middleware platforms. The Vine group will try out the Java implementation to do so. 2. the SAGA Core experience document Andre was walking the group through the upcoming experience document. The discussion lead to the following action items: clarify the notions of interoperable vs. compliant what do we need/want to show exactly? should the service discovery (SD) extension package be covered in this experience doc? decision: No remove section 2, there seems no real value here section 3: was debated as well solution: merge its content into the current section 4 make more concise points about what we want to test, exactly The session was closed at 17:30. -- Thilo Kielmann http://www.cs.vu.nl/~kielmann/

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Final Call: advert extension
by Andre Merzky 04 Apr '10

04 Apr '10

Hi all, attached is the latest draft of the SAGA Advert API extension, which includes changes as agreed on the last call. If there are no comments to the contrary, I'd like to submit that draft to the editor at the end of the week. Please have a close look at the object serialization description - that is the part that changed most over the last month or so. Also, the TTL management has changed somewhat compared to the draft discussed at last OGF. Best, Andre. -- Nothing is ever easy.

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minute from OGF28 SAGA session, 16/03, 15:00-16:30
by Thilo Kielmann 01 Apr '10

01 Apr '10

meeting of SAGA-WG at OGF28, tuesday 16/03/2010, 15:00-16:30 session chaired by Andre Merzky notes taken by Thilo Kielmann The fourth session at OGF28 had two agenda points: 1. presentation by Go Iwai about the SAGA implementations done by the Japanese NAREGI project. They identified several (fortunately small) issues with the spec. It was decided to incorporate their findings in the errata document and to close the list of errata then. (We are not aware of another mature implementation effort from which we have not received errata feedback yet.) 2. adaptor development by independent groups Fortunately, SAGA takeup has got to the phase where groups beyond the initial implementors wish to contribute adaptors. The need for clear adaptor interfaces is rising. There was some initial discussion, however, no clear decisions were made. (The subject is important and upcoming, but the SAGA folks are currently into fixing too many loose ends already, so this will have to wait at least one more OGF meeting.) -- Thilo Kielmann http://www.cs.vu.nl/~kielmann/

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CVS freeze
by Andre Merzky 31 Mar '10

31 Mar '10

Hi all, we are finally migrating the SAGA-RG document repository from CVS to SVN. Please don't commit to CVS for a while - I'll send around the new SVN details shortly. Best, Andre. -- Nothing is ever easy.

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saga-ogf SVN commit 1215: /trunk/SAGA-Core-Experience/
by amerzky＠cct.lsu.edu 31 Mar '10

31 Mar '10

User: amerzky Date: 2010/03/31 03:08 PM Modified: /trunk/SAGA-Core-Experience/ Makefile Log: testing the new svn repository -- A File Changes: Directory: /trunk/SAGA-Core-Experience/ ======================================= File [modified]: Makefile Delta lines: +1 -1 =================================================================== --- trunk/SAGA-Core-Experience/Makefile 2010-03-31 20:13:22 UTC (rev 1214) +++ trunk/SAGA-Core-Experience/Makefile 2010-03-31 21:08:09 UTC (rev 1215) @@ -2,7 +2,7 @@ ##################################################################### # project name -BASE = saga_core_experience +BASE = saga_core_experience ##################################################################### # executeables

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SAGA Job State Model
by Ole Weidner 23 Mar '10

23 Mar '10

Aloha, what was the reason again *not* to have a "pending" state in the saga job model? I'm implementing the third job adaptor (gLite CREAM) for saga and again, I don't know if I should map gLite's "pending" state to saga::job::New or saga::job::Running. Most of the middleware API's out there come with a plethora of states (e.g. gLite: 11), but most of them map naturally map to one of the saga job model's states. "Pending" is a state pretty much used by everyone (Condor, PBS, LSF, Globus, gLite, GridSAM) and it really doesn't map to saga's model. IMHO it's a major design flaw - how could this fall through the sieve? Or is there a reason behind this? Cheers, Ole

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minute from OGF28 SAGA session, 16/03, 10:30-12:00
by Andre Merzky 16 Mar '10

16 Mar '10

Working Session III - Extensions -------------------------------- - When: Tuesday, Mar 16 2010, 10:30 - Where: A-125, OGF.28 - advert (doc) - ttl should be mandatory, need to be respected - backend should complain on invalid/neg ttl settings, not reset timer - set_ttl resets timer - add the clone() statement as discussed - rediscuss exclusion/limitation of session/context serialization - make refs to GFD.90 clearer - add interop section which explains what level of interop we expect (cross application/adaptor/backend/language/...) - binding docs (ahem) - TODO: write! Cheers, Andre. -- Nothing is ever easy.

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Re: [SAGA-RG] Final Call: SAGA Core Experience Document
by Andre Merzky 12 Mar '10

12 Mar '10

Hi all, attached is the latest draft of the SAGA Core API Experience Document. It has by been reviewed by a number of people (special thanks to Ceriel!), and should be in sync with all implementations. I took the liberty to add basically all SAGA implementors as authors of the document, for obvious reasons. If someone feels uncomfortable with that approach in general, or with a specific name, please let me know. Also attached is the Revised SAGA Core API specification, with all applied errata. That doc will accompany the experience document, and will replace GFD.90. All changes should be marked, and shortly described in the appendix of the Experience doc. I would appreciate if as many eyes as possible could cross check those changes! If there are no comments to the contrary, I'd like to submit that draft to the editor at the end of next week (after OGF28). Best, Andre. -- Nothing is ever easy.

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Does and Donts of API design...
by Andre Merzky 12 Mar '10

12 Mar '10

FYI: http://www.eucalyptus.com/blog/2010/03/11/cloud-apis I find the points interesting, also those made in the linked blog entries. Although the discussion focuses on Cloud APIs, most points hold for all APIs IMHO. Best, Andre. -- Nothing is ever easy.

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Phone call on Wednesday
by Andre Merzky 10 Mar '10

10 Mar '10

Hi all, our next call is on Wednesday at 10pm CET (3pm Central). Dial-in details are: +1-225-578-4942 (international) 866-573-0359 (US, toll free) conference-id: 118682 If there are only Europeans on the call, ew may switch to skype at runtime. proposed agenda items - prepare for OGF28 - open items for Advert extension - open items for CPR extension - open items for experience document We are in the process of finalizing the experience document - we'll send the latest version to the list a couple of hours before the call. The curious ones may want to check it earlier via CVS. Similar for the CPR extenion: this should be close to a final call as well - I circulate the current state on the list tomorrow. Other agenda suggestions are welcome. Best, Andre. -- Nothing is ever easy.

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