GliteARC interoperability

1
Glite/ARC interoperability

• Christian Ulrik Søttrup
• EGEE-II/(KnowARC)

2
Interoperabillity

• Allowing seamless job submission access to
  NorduGrid resources from Glite clients and vice
  versa.
• Implies interoperability of info systems
• Glite -gt Nordugrid covered by EGEEII
• ARC -gt EGEEII covered by KnowARC

3
Glite -gt Arc

• Glite broker uses Condor-G to submit to LCG and
  Glite CEs, using GT2 and Condor-C respectively
• Condor-G gt6.7.12 can submit to Arc
• Idea create a Glite info server with Arc info
  and then modify the broker to use Condor-G Arc
  submit.

4
Glite -gt Arc Overview
5
Glite -gt Arc Status

• Information System
• preliminary system (arc-bdii.cern.ch) works
• needs full scale testing
• Problem with resource matching, Glite CE-matcher
  uses Glite specific comments from the bdii.
• WMS condor
• Development Glite-WMS system w. condor/Arc works
  (for Glite jobs)
• New Glite version incorporates usable condor
• JobAdapter needs test (and recoding)

6
Arc -gt Glite Gateways/Direct

• Direct Integrating Nordugrid client and condor
• Pros
• Direct submission to Glite CEs
• Cons
• Bloat NG Client 10mb Condor 100mb
• Interface changes. (Glite update -gt ARC update)
• Gateways
• Pros
• Better scheduling
• Cons
• Scalability/price

7
Arc -gt Glite CE interface

• Gateways/Direct not feasible
• Solution Open interface for job management on
  Glite CEs
• Good news CREAM a new CE type with a web service
  interface developed under EGEE
• Bad news Not supported by Glite production CEs,
  yet. But is installed on Glite testbeds.

8
Arc -gt Glite Webservices

• CREAM interface
• Pros
• Direct submission to EGEE controlled CEs
• Scalability
• Composability
• Portability easy to build NG clients for
  windows and Mac
• Cons
• Performance Binary XML might help, but no
  standard yet.

9
Arc/Glite new solution

• Integrating a CREAM compatible Web Service layer
  in Arc, both client and server.
• Server CREAM layer can work independently of the
  Grid Manager
• Pros
• Gives interoperability through open interfaces.
• As well as a WS interface for Arc. (Task 1.2)
• Windows/Mac Arc client can use WS interface for
  easy porting.

10
Thank you

• Questions?
• Ideas -gt soettrup _at_ nbi . dk