IBM TS7600 with ProtecTIER Software Upgrade Manual page 86

3. The utility will automatically perform the tests in sequence. The client output
Interpreting the results
The utility performs five foreground tests (Tests 1-5 below), and one background
test (Test 6 below). The example outputs below are from the client side. Each of the
first five tests below ran for 300 seconds (-t 300), while the last test monitored TCP
performance during that time.
Test 1: Latency
This test checks the nominal network link latency and packet loss. Example result:
Interpreting the results:
v The average round-trip-time (rtt) was 78.4ms and there was 0% packet loss.
v The latency in WAN topologies may vary, but should never exceed 200ms.
v Higher latency values will cause a major deterioration in replication throughput.
v Packet loss should be 0%. Any other value indicates a major network problem.
Test 2: Throughput - default settings
72
IBM System Storage TS7600 with ProtecTIER: Software Upgrade Guide
(server2 in the example below) will look similar to the following:
Note: In the sample output below the test ran for only 5 seconds instead of
300.
*** Latency
PING 9.5.53.33 (9.5.53.33) 56(84) bytes of data.
--- 9.5.53.33 ping statistics ---
5 packets transmitted, 5 received, 0% packet loss, time 4001ms
rtt min/avg/max/mdev = 0.257/0.406/0.484/0.079 ms
*** Throughput - Default TCP
[ 3] 0.0- 5.0 sec 56.6 MBytes 94.8 Mbits/sec
*** Throughput - 1 TCP stream(s), 1MB send buffer
[ 3] 0.0- 5.0 sec 57.0 MBytes 95.0 Mbits/sec
*** Throughput - 16 TCP stream(s), 1MB send buffer
[SUM] 0.0- 5.8 sec 65.0 MBytes 94.3 Mbits/sec
*** Throughput - 127 TCP stream(s), 1MB send buffer
[SUM] 0.0-11.3 sec
Number of TCP segments sent: 230536
Number of TCP retransmissions detected: 21 (0%)
Done.
See the next section for information about interpreting the results of the tests.
*** Latency
PING 10.0.13.194 (10.0.13.194) 56(84) bytes of data.
--- 10.0.13.194 ping statistics ---
120 packets transmitted, 120 received, 0% packet loss, time 119060ms
rtt min/avg/max/mdev = 57.403/78.491/104.451/9.872 ms
Contact your network administrator if latency reports more than 200ms, as it
may significantly decrease replication throughput.
127 MBytes 94.1 Mbits/sec