Abstract:

Modern large-scale cloud computing tasks often balance the load across multiple clusters. For this reason，to plan the network connecting the clusters and to provide satisfying network performance are of important significance. Based on the description of inter-cluster network performance problem and its resolving process，the inter-cluster network performance optimization was discussed. This case came from a data center for rea1-time large-scale data processing，where the bandwidth was not fully used but severe packet loss happened in case of large-scale concurrent tasks. Based on the analysis of topology，performance bottleneck was located. By building a test environment and the actual testing，the performance bottleneck was found：it was a switch lack of processing power and cache. Finally，the various elements related with the performance were analyzed，and a solution based on increasing the frame length was proposed.

Key words: cluster network, performance optimization, throughput