Hi, I have recently been running performance tests with zones on several Sun servers. (280's and 880's), 2 CPU and 8CPUs respectively.
On my 280 servers (2CPU machines), I installed and booted 3 zones and I get poor performance on across the network (400Mbps). I only transfer data at 80% of what I can in the global zone with no zones installed or booted (where I measured 550Mbps). That is a 20% difference in performance. I tested with the opensource tool called IPERF. I originally thought that zones were causing my problems so I decided to move to another type of hardware, a V880 (8 CPU) machine. When I ran my performance tests again with 3 zones installed and booted I saw <1% overhead in the network compared to running in the global zone with no zones installed or booted. Both of the 880 tests ran around 860 Mbps throughput with less then 1% difference between several scripted tests. Can anyone explain why I see this? Both servers have gigabit NICs installed. The only thing I can think of is that the backplane on the servers in a bottleneck for the small 280 servers. But how could this (or something else in the kernel space) be causing the symptoms I see above? Any comments would be helpfull, Thanks, ljs This message posted from opensolaris.org _______________________________________________ perf-discuss mailing list [email protected]
