FYI, Andre. ----- Forwarded message from Mariusz Mamo??ski <mamonski@man.poznan.pl> -----
Date: Thu, 7 Jan 2010 15:16:06 +0100 Subject: Re: Fwd (kielmann@cs.vu.nl): Re: [SAGA-RG] Face-to-Face Meeting From: Mariusz Mamo??ski <mamonski@man.poznan.pl> To: Andre Merzky <andre@merzky.net>, Thilo Kielmann <kielmann@cs.vu.nl>, Peter Tröger <peter@troeger.eu> Cc: Ariel Oleksiak <ariel@man.poznan.pl>
Hi,
As the late follow up let me also share with our experience on exposing advance reservations capabilities of the batch systems:
http://fury.man.poznan.pl/~mmamonski/wiki/index.php/DRMAAv2/Advance_Reservat...
The similarity with the DRMAAv2.0 look-and-feel of this interface is intended ;-)
The main differences with SAGA approach are: - we have no reservation state model. The rationale behind this is that, in opposite to jobs, advance reservations are quite predictable (you always know the start and end time of the reservation) so we do not see any sense in polling whether reservation is in RUNNING state. The only unpredictable state is an error state (e.g. reserved host is down) but this is not easily detectable in majority of the DRMS we tested. - we proposed some best-effort semantics : * the requested CPU count (here called "slotsCount") can be expressed as a range value and the system is obligated to reserve as much resources as possible (constrained by the given range) * in addition to the reservation start and end time one can specify also the reservation duration (shorter than the endTime - startTime). In this case system tries to book resources in the earliest possible time (having in mind the other resource requirements, e.g.: slotsCount)
All the best,
On Fri, Dec 11, 2009 at 3:17 PM, Andre Merzky <andre@merzky.net> wrote:
FYI, Andre.
-- Nothing is ever easy.
---------- Forwarded message ---------- From: Thilo Kielmann <kielmann@cs.vu.nl> To: Andre Merzky <andre@merzky.net> Date: Wed, 9 Dec 2009 17:01:30 +0100 Subject: Re: [SAGA-RG] Face-to-Face Meeting
Hi all,
unfortunately I cannot make it to the meeting tomorrow :-(
Nevertheless, I would like to share the XtreemOS view on resource reservations with you:
1. we have basically split SAGA's job-description into two parts a) a resource-description (everything machine specific) b) an application-description (everything app specific)
2. we have added a notion of reservation, with reservation service and state model
3. jobs can now be submitted either as in SAGA's job package, or indirectly, by getting a reservation first, and then submitting to the reservation...
4. a student of mine has extended this idea to clouds: a) he added image management for virtual machines b) he extended the reservation manager such that VM's can be created "on the fly" of reserving them
The gory details are in the attached document. The interesting part starts on page 24, which is Section 5.7.
As needed, I can call in tomorrow/friday. Please let me know.
Regards,
Thilo
On Dec 5, 2009, at 11:20 PM, Andre Merzky wrote:
Hi all,
this is an reminder that we have the DRMAA/SAGA F2F next week, Thursday/Friday, at gthe Zuse Institute Berlin. We have booked the room all day, so I propose we start at Thursday 9am and finish 4pm Friday.
As far as agenda goes, we will use up most of the time to sync the evolution of DRMAA with the evolution of the SAGA job package. We'll thus cover an overview of both in the beginning, and then discuss various separate items in depths, such as
- object hierarchy - job monitoring - notification mechanism etc.
This list is at the moment open, and will likely defined by the set of participants on the fly.
Please let me know if you need further information or travel advice.
Cheers, see you soon, Andre.
Quoting [Andre Merzky] (Nov 09 2009):
Hi again,
it seems that December 10/11 is the preferred option for the F2F, so we'll go ahead and plan for that date.
So far we have confirmations from five people to attend. We'd appreciate if you could all confirm your attendence by end of November.
The meeting will be hosted by Zuse Institute Berlin (thanks!). We'll send the exact details around about a week before the meeting. To help travel planning: ZIB is about an hour away from Tegel Airport, about two hours from Schoenefeld Airport, and about 30 minutes from Berlin Downtown. More details, and proposed accomodations, are on http://www.zib.de/besucher/index.en.html Please let us know if you want us to help organize accomocations.
To re-iterate: this will mostly be a DRMAA meeting, dedicated to make progress on the open DRMAA.v2 issues, but we will use part of that F2F time to sync with the SAGA approaches which seem to have covered some part of the problem space targeted by DRMAA.v2.
Cheers, see you soon in Berlin,
Andre.
Quoting [Andre Merzky] (Oct 24 2009):
[ sorry for cross-posting ]
Hi DRMAA group, Hi SAGA group,
at OGF27, we discussed a joined 2-day face-to-face meeting between the SAGA and DRMAA groups, with focus on the upcoming DRMAA.v2 specification. We expect a SAGA DRMAA extension to be specified in lockstep -- thus the cross-group participation.
At the moment, we plan to have that F2F meeting in Berlin (thanks to Alexander for agreeing to host!). We created a doodle form to poll for possible dates - so for all those who intent to participate in the F2F, please add your availability at:
http://www.doodle.com/m4z7fy888yndp7f7
The F2F is open of course, but we may have some space constraints - so please *do* fill the doodle soon, so that we can have a reasonable estimate about participation.
Cheers, Andre
-- Nothing is ever easy. -- saga-rg mailing list saga-rg@ogf.org http://www.ogf.org/mailman/listinfo/saga-rg
-- Thilo Kielmann http://www.cs.vu.nl/~kielmann/ -- Nothing is ever easy.