In this paper, we evaluate the performance of two wireless mesh networks (WMNs) architectures considering packet delivery ratio (PDR), throughput, delay and fairness index metrics. For simulations, we used ns-3, distr...
详细信息
In this paper, we evaluate the performance of two wireless mesh networks (WMNs) architectures considering packet delivery ratio (PDR), throughput, delay and fairness index metrics. For simulations, we used ns-3, distributed coordination function (DCF) and optimised link state routing (OLSR). We compare the performance of transmission control protocol (tcp) Tahoe, Reno and NewReno for normal and uniform distributions of mesh clients by sending multiple constant bit rate (CBR) flows in the network. The simulation results show that the PDR for both distributions and architectures is almost the same, but the PDR of I/B WMN for uniform distribution is a little bit higher than normal distribution. For both WMN architectures, the throughput of normal distribution is better than uniform distribution. The delay of Tahoe is a little bit lower compared with other algorithms for normal distribution and Hybrid WMN, but in case of uniform distribution, the NewReno performs better than other algorithms for both architectures. The fairness index of normal distribution is higher than uniform distribution.
This research work presents an investigation of the impact of a wide range of factors on the performance of parallel file systems (PFSs). It is the result of an extensive test campaign with three distinct computing pl...
详细信息
ISBN:
(纸本)9781467376921
This research work presents an investigation of the impact of a wide range of factors on the performance of parallel file systems (PFSs). It is the result of an extensive test campaign with three distinct computing platforms and value variations for eleven factors that advance the understanding of PFSs' behavior under different conditions. Our main contributions are the characterization of effects not fully explained or misunderstood in the literature previously. First, we demonstrate that no significant performance variation (approximate to 6%) is observed when choosing one among four tcp congestion-avoidance algorithms. Second, we detail the effect of the page cache of I/O nodes on a PFS's write throughput and how it relates to other factors.
暂无评论