Modeling of NAMD's Network Input/Output on Large PC Clusters

This study examined the interplay among processor speed, cluster interconnect and file I/O, using parallel applications to quantify interactions. We focused on a common case where multiple compute nodes communicate with a single master node for file accesses. We constructed a predictive model that used time characteristics critical for application performance to estimate the number of nodes beyond which further performance improvement became unattainable. Predictions were experimentally validated with NAMD [12, 14], a representative parallel application designed for molecular dynamics simulation. Such predictions can help guide decision making to improve machine allocations for parallel codes in large clusters.

• Type: Conference
• Year: 2007
• Where: IPPS
• Authors: Nancy Tran, Daniel A. Reed
• Keywords: Distributed And Parallel Computing, IPPS 2007, Multiple Compute Nodes, Parallel Application, Representative Parallel Application