CCA Forum Spring Meeting April CCA Common Component Architecture Fault Tolerance and the Common Component Architecture David E. Bernholdt ORNL

CCA Forum Spring Meeting April 2007 CCA Common Component Architecture Center for Improvement of Fault Tolerance in Systems (CIFTS) Participants: Institution – PI –ANL – Beckman (Lead PI) –Indiana U – Lumsdaine –LBNL – Hargrove –Ohio State U – Panda –ORNL – Geist –U Tennessee – Dongarra Submitted as SciDAC 2 CET Funded as base program Also known as FOBAWS, Faulty

CCA Forum Spring Meeting April 2007 CCA Common Component Architecture Fault Tolerance Backplane (FTB) The core idea of CIFTS Event service to convey fault information throughout the software stack and the machine –Hardware sensors to OS/runtime to libraries to applications FTB components may generate or consume fault-related events –Prediction, adaptation, response

CCA Forum Spring Meeting April 2007 CCA Common Component Architecture Planned Areas of Activity ANL (Beckman) –Parallel file systems –MPI, MPI-IO –Linux –Scheduler/resource manager Indiana U (Lumsdaine) –MPI, MPI-IO LBNL (Hargrove) –Checkpoint/restart Ohio State U (Panda) –Interconnect ORNL (Geist) –CCA integration –Applications (chemistry, fusion) U Tennessee (Dongarra) –Scalapack, math libraries

CCA Forum Spring Meeting April 2007 CCA Common Component Architecture CCA Integration CCA components should be able to consume or generate FTB events –Adapter between FTB and CCA event service Main focus –CCA applications will be consumers of FTB information Interesting secondary possibilities –Allow CCA components to plug into FTB as to provide adaptation/response services –FTB could be derived from CCA event service

CCA Forum Spring Meeting April 2007 CCA Common Component Architecture Summer Plans MCMD architecture for SWIM Integrated Plasma Simulator (IPS) to be developed this summer by Samantha Foley (IU) –Not CCA-compliant, but will provide use case and prototype implementation for CCA MCMD discussions Demonstration of FT in MCMD IPS to be developed by Aniruddha Shet –Focus on a few simple MCMD-relevant events –Use IPS event service (FTB not designed)

CCA Forum Spring Meeting April 2007 CCA Common Component Architecture Discussion: What FT Events are Relevant to CCA? Presumably many FT events are interesting to CCA applications, utility components What FT events are relevant to CCA itself? –framework parallel distributed –services –…