[GSA-RG] OGF22, GSA-RG Session Minutes
Ramin Yahyapour
ramin.yahyapour at udo.edu
Thu Feb 28 13:55:13 CST 2008
Dear all,
please find attached the minutes for our OGF22 GSA-RG Session.
They are also uploaded at GridForge:
https://forge.gridforum.org/sf/go/doc15127?nav=1
Any comments are appreciated.
Ramin
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Minutes GSA-RG
OGF22, Cambridge, MA
September 28, 2008
Time 10:45-12:15
Participants: 25
Minute taker: Ramin Yahyapour
- Intro (Philipp)
o Slides available at:
http://www.ogf.org/OGF22/materials/1099/GSA-RG_Session_Slides.ppt
o Current focus on Interop documents
- Document "GSA - Req and Rec" Update (Alexander)
o Take current OGF proposals and verify its use for GSA
o Basic: JSDL, OGSA-RSS, OGSA-BES
o Optional: GRAAP, GSM, OGSA-DMI, OGSA-RUS, OGSA-UR
o maybe later: CDDLM
o consensus: no other spec currently comes into mind.
- Scenario I:
o Interface to the scheduler?
- BES is an option. In the OGSA-EMS model, the "Job Manager" is
the comparable role of a scheduler which uses a BES interface.
o Challenges:
- preventing loops between schedulers if one cannot fulfill
a request.
- Security, proxies and delegation needs to be considered at one
point in time.
- Which scheduler/job manager keeps track/responsibility for a job.
o Slide 9: EPS would be the correct entity instead of CSG
o Consensus:
- For scenario I the BES interface should be sufficient for the scheduler
- Scenario II:
o like Scenario I plus WS-Agreement
o Q: Does WS-Agreement subsume the submission process? not really,
WS-A is agnostic
to the SLA content.
o Is again BES sufficient?
- Comment for AssessGrid: Broker as virtual provider, use
WS-Agreement and no BES
- need for WS-A and BES: first WS-A and next BES activity creation
with associating SLA.
o User should be able to specify whether jobs can be relayed.
- can be part of the Agreement requirements.
- maybe necessary also to prevent loops: specify which providers
not to consider/
not necessary if certain topologies/hierarchies are underlying
o Consensus:
- we need WS-A and BES; interplay needs to be defined
- Scenario III and onwards
o Data management is important, but it is not yet sure what services to involve
- GSM? not clear what functionality will be provided and how to include
o Advance Reservation is currently not specified in the OGSA-EMS model.
- Interop preparation
o should implementations for interop scenario I immediately include
II feature WS-A
- might be too difficult for some implementations
- up to the implementator
o how to learn about other schedulers?
- currently out of scope, just consider this as given/pre-configured
o Interop implementators:
- PSNC with GRMS
- Dortmund UoT
o Is it necessary to implement/support als discussed specs?
- actually not; submission model is enough; there is no requirement
to implement EPS/CSG etc for the lower systems
- Consensus:
- Two interop levels:
a) no need for lower-level systems to provide EPS/BES, just
the scheduler
b) full support for EPS/BES for lower level systems
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