On Oct 21, 2004, at 3:35 PM, Dameon White wrote:
We just upgraded our TSM server and a few clients with GigE adapters. When I FTP a file from client to server, I am seeing approximately 65MB/sec. When I backup the client I am only seeing 11 MB/sec. Is there a setting that I forgot to set/adjust?
The viability of that FTP test can be skewed by using a small file: try to either use a large file (GB or more) or a feeder mechanism as described in topic NETWORK PERFORMANCE, near the bottom of http://people.bu.edu/rbs/ADSM.QuickFacts which also describes other factors we have collectively found. Ideally, the backup would use the same large file. Network speed tests can become skewed if network buffers are quickly absorbing the modest data which is to be sent, whereas a much larger set of data will involve actual network data transfer and thus better average the throughput over time. (Asynchronous buffering of I/O skews the view of reality.) And there is always the TSM Tuning Guide.
That said, how does the 11 MB/s speed compare with the benchmark of your previous network configuration, which is to say the same client and server arrangement, with only the pipe between them being different?
Richard Sims
