Below are the meeting notes for todays call. We'd be happy to see feedback, in particular to the python discussion. Cheers, Andre. - When: Wed Oct 07, 2009, 22:00 CEST - Who : Steve, Hartmut, Ole, Shantenu, Andre - What: - update from OGF27 - all participants have been at OGF, or have been updated<F2> - info about DRMAA/SAGA collaboration - no DRMAA callin - postponed - python bindings - no VU calling, thus only partially discusses - see Steve's mail: file io more native. - CCT groups agrees - VU answer awaited - attributes - have been discussed at OGF - CCT proposal: - continue to use dict interface, but do not expose as class attribs - saga objects which implement attrib interface would thus implement the python dictionary interface, but could have a remote implementation behind it - set_attribute()/get_attribute() is required for async ops though - advert extension - flags are missing on short C'tor - TTL was discussed, and agreed that it MUST NOT impose anything on the implementation. Default ttl should be infinite (-1). - it has been discussed if TTL should be exposed as attribute. After some discussion, it seems that set_ttl and get_ttl seems fine after all. - the advert class should not have a second c'tor, in sync with other SAGA packages. - the doc will be revised and put into last call on mailing list. Quoting [Andre Merzky] (Oct 21 2009):
Date: Wed, 21 Oct 2009 10:03:00 -0500 From: Andre Merzky <andre@merzky.net> To: SAGA RG <saga-rg@ogf.org> Cc: Andre Merzky <andre@merzky.net>, Steve Fisher <dr.s.m.fisher@gmail.com> Subject: Re: [SAGA-RG] phone call cadence
In respect to the python bindings, please all have a look at the proposed bindings at http://www.cs.vu.nl/~kielmann/pysaga/ , if possible *before* the call ;-)
Issues raised at OGF27 are:
- file read returns int *or* string?? Uhm ... possibly split into read_buffer or read_string? - app managed buffers are supposed to make zero-copy-read possible. If a copy happens anyway, one does not nead application managed buffers! Clarify! - buffer CAN be deleted if bindings can do same semantics natively - possibly two flavours for 2.x and 3.x: signed char array vs byte buffer - NORMAL -> SYNC - attribute interface: possibly to ONLY set_attribute/get_attribute, even if that is not 100% Pythonesc. SAGA attribs *are* *not* class member attribs, but conveye a different semantics. Also, ther are sometimes extensible, sometimes not, sometimes readwrite, sometimes readonly - all difficult to express in the 'native' way it seems. Not to speak of async... - shouldn't exceptions be nested? - What is an SagaIOError? Does it make sense? Use Case? - no set_defaults on context! - enums in UPPER_CASE_WITH_UNDERSCORES (object_type) - bindings seem to be designed before ERRATA - please recheck EVERYTHING!
Thilo, do you have an answer on those issues by now, by any chance?
Cheers, Andre.
Quoting [Steve Fisher] (Oct 21 2009):
Date: Wed, 21 Oct 2009 09:49:32 +0100 Subject: Re: [SAGA-RG] phone call cadence From: Steve Fisher <dr.s.m.fisher@gmail.com> To: Andre Merzky <andre@merzky.net> Cc: SAGA RG <saga-rg@ogf.org>, Steven Newhouse <s.newhouse@omii.ac.uk>, Thijs Metsch <Thijs.Metsch@sun.com>, Daniel Templeton <Dan.Templeton@sun.com>
I will try to join today because I am interested in the Python bindings. However I will not generally participate as it is too inconvenient at this time.
Steve
2009/10/20 Andre Merzky <andre@merzky.net>:
Mathijs was the only one who cannot make the proposed time. So, sorry to him, but we'll go ahead with that timeslot then.
Please mark your calendars then for Wednesday, Oct. 21, at
3pm Central Time Zone (Summer Time) 10pm Central European (Summer Time)
The call will repeat every second week.
Agenda for our first call:
- update from OGF27 - info about DRMAA/SAGA collaboration - possibly discussion of python bindings (depending on participation) - possibly discussion of advert extension (depending on participation)
For this week I could get us the LSU telephone bridge. Dial-in details are:
+1-225-578-4942 (international) 866-573-0359 (US, toll free)
conference-id: 118682
Using skype to dial in to that bridge works of course, and is cheap from Europe. The following calls will either use the same line, or skype conferences - we'll sync about that before the calls.
Cheers, Andre.
Quoting [Andre Merzky] (Oct 14 2009):
Hi all,
the topic of reviving our WG phone calls has come up at OGF27 (and before actually). We would like to propose a bi-weekly schedule, at Wednesdays 10pm CET (3pm Central). Note that the DRMAA WG will hopefully pick the same slot, also bi-weekly, so that the calls for both groups will alternate.
Is there anybody on the list who would like to participate, but can't make this time slot?
Cheers, Andre.
-- Nothing is ever easy. -- saga-rg mailing list saga-rg@ogf.org http://www.ogf.org/mailman/listinfo/saga-rg -- Nothing is ever easy.