Process Migration in Clusters and Cluster Grids
József Kovács · Kluwer Academic Publishers eBooks · 2005
The paper describes two working modes of the parallel program checkpointing mechanism of P-GRADE and its potential application in the nationwide Hungarian ClusterGrid (CG) project. The first generation architecture of ClusterGrid enables the migration of parallel processes among friendly Condor pools. In the second generation CG Condor flocking is disabled, so a new technique is introduced to somehow interrupt the whole parallel application and take it out of the Condor scheduler with checkpoint files. The latter mechanism enables a parallel application to be completely removed from the Condor pool after checkpointing and to be resumed under another non-friendly Condor pool after resubmission. The checkpointing mechanism can automatically (without user interaction) support generic PVM programs created by the P-GRADE Grid programming environment.