Publications Repository - Gdańsk University of Technology

The increasing size of computational clusters results in an increasing probability of failures, which in turn requires application checkpointing in order to survive those failures. Traditional checkpointing requires data to be copied from application memory into persistent storage medium, which increases application execution time as it is usually done in a separate step. In this paper we propose to use emerging byte-addressable non-volatile RAM (NVRAM) as a persistent storage medium and we analyze various methods of making consistent checkpoints with support of MPI one-sided API in order to minimize checkpointing overhead. We test our solution on two applications: HPCCG benchmark and PageRank algorithm. Our experiments showed that NVRAM based checkpointing performs much better than traditional disk based approach. We also simulated different possible latencies and bandwidth of future NVRAM and our experiments showed that only bandwidth had visible impact onto application execution time.

Authors

• inż. Piotr Dorożyński link open in new tab ,
• dr hab. inż. Paweł Czarnul link open in new tab ,
• Artur Malinowski link open in new tab ,
• Krzysztof Czuryło,
• Łukasz Dorau,
• Maciej Maciejewski,
• Paweł Skowron