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Hi, I have been doing a lot of benchmarking of xrootd using memory mapped files, e.g. no disk I/O. Mostly I have focused on latency as opposed to bandwidth, but I can show you a bandwidth result using multiple clients. All the machines in this test are using GigE. The test uses a single xrootd server and up to 40 clients. Basically, the bandwidth depends on the client blocksize with the network being the bottleneck with as few as 5 clients at the larger blocksizes. At the smaller blocksizes, the xrootd server bottlenecks on the CPU. Since the test is not doing any disk I/O, it shows the peak capability of the xrootd server. I've attached two plots, one showing the aggregate bandwidth, and the other the average client bandwidth. --Bill Weeks