Hi, I am running a series of tests, and I am surprised by the results.
If I use about 10 clients, then the write performance of my system is 2 GB/s, and the read performance of my system is also 2 GB/s. These are the results when I run either reads or writes, but not both at the same time. But, when I have 10 clients doing reads, and a different 10 clients doing writes, the write performance barely drops, but the read performance drops to about 150 MB/s. I am using the deadline scheduler. I have played around with various parameters, such as nr_requests, writes_starved, and fifo_batch, but with little impact. Can anyone suggest why this is occurring, and how to address it? In my idealized world, the read and write performance should be proportional to the initial read and write performance, and the ratio of the number of read and write clients. Thanks. Roger Spellman Staff Engineer Terascala, Inc. 508-588-1501 www.terascala.com http://www.terascala.com/
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