Scalable systems software---A software based approach for providing network fault tolerance in clusters with uDAPL interface

Abhinav Vishnu, Prachi Gupta, Amith R. Mamidala, Dhabaleswar K. Panda
2006 Proceedings of the 2006 ACM/IEEE conference on Supercomputing - SC '06  
In the arena of cluster computing, MPI has emerged as the de facto standard for writing parallel applications. At the same time, introduction of high speed RDMA-enabled interconnects like InfiniBand, Myrinet, Quadrics, RDMAenabled Ethernet has escalated the trends in cluster computing. Network APIs like uDAPL (user Direct Access Provider Library) are being proposed to provide a networkindependent interface to different RDMA-enabled interconnects. Clusters with combination(s) of these
more » ... ts are being deployed to leverage their unique features, and network failover in wake of transmission errors. In this paper, we design a network fault tolerant MPI using uDAPL interface, making this design portable for existing and upcoming interconnects. Our design provides failover to available paths, asynchronous recovery of the previous failed paths and recovery from network partitions without application restart. In addition, the design is able to handle network heterogeneity, making it suitable for the current state of the art clusters. We implement our design and evaluate it with micro-benchmarks and applications. Our performance evaluation shows that the proposed design provides significant performance benefits to both homogeneous and heterogeneous clusters. Using a heterogeneous combinations of IBA and Ammasso-GigE, we are able to improve the performance by 10-15% for different NAS Parallel Benchmarks on 8x1 configuration. For simple microbenchmarks on a homogeneous configuration, we are able to achieve an improvement of 15-20% in throughput. In addition, experiments with simple MPI micro-benchmarks and
doi:10.1145/1188455.1188545 dblp:conf/sc/VishnuGMP06 fatcat:gpnejxsgibdivkz5wsrxgbl7ka