Example: Summary (default) report

A traffic report shows, for example, request processing time, throughput of a device, and number of requests.

Table 1 shows an example of the default report:

Table 1. Example of default reportOutput of the ziorep_traffic command
# ./ziorep_traffic stress_single.log -e "2008-11-11 19:59:45" -l 40c1403100000000 -l 40c1403500000000 WWPN LUN \|I/O rt MB/s\|thrp in MB/s\|----I/O requests----\|-I/O subs. lat. in us--\|--channel lat. in ns---\|---fabric lat. in us---\| min max avg stdev #reqs rd wrt bidi min max avg stdev min max avg stdev min max avg stdev 2008-11-11 19:57:37 50050763031b448e:40c1403100000000 0 103K 0.1 981.1 7357 6.0K 1.4K 0 360 3.0M 72.24K 71.05G 0 91M 284.3K 5.589T 0 3.0M 67.55K 64.19G 50050763031b448e:40c1403500000000 0 127K 0.1 1.130K 7838 6.1K 1.7K 0 323 3.5M 79.94K 72.32G 0 22M 287.9K 762.4G 0 3.5M 75.47K 69.29G 19:58:37 50050763031b448e:40c1403100000000 0 126K 0.1 1.709K 8611 7.8K 832 0 282 57M 94.52K 864.8G 0 66M 283.7K 3.462T 0 3.8M 76.98K 120.5G 50050763031b448e:40c1403500000000 0 94.1K 0.1 1.489K 7404 6.7K 740 0 318 70M 93.78K 1.396T 0 71M 219.1K 1.579T 0 4.1M 71.35K 99.01G 19:59:37 50050763031b448e:40c1403100000000 0 97.7K 0.1 1.695K 6280 4.9K 1.4K 0 324 45M 124.0K 434.8G 0 47M 363.7K 2.312T 0 3.4M 111.3K 104.1G 50050763031b448e:40c1403500000000 0 109K 0.1 1.153K 7440 5.6K 1.9K 0 383 64M 141.0K 652.3G 0 53M 343.9K 1.452T 0 3.4M 128.1K 107.4G

Table 1. Example of default reportOutput of the ziorep_traffic command

# ./ziorep_traffic stress_single.log -e "2008-11-11 19:59:45" -l 40c1403100000000 -l 40c1403500000000
      WWPN            LUN         |I/O rt MB/s|thrp in MB/s|----I/O requests----|-I/O subs. lat. in us--|--channel lat. in ns---|---fabric lat. in us---|
                                    min   max    avg  stdev #reqs   rd  wrt bidi  min  max    avg  stdev  min  max    avg  stdev  min  max    avg  stdev
2008-11-11 19:57:37
50050763031b448e:40c1403100000000     0  103K   0.1  981.1   7357 6.0K 1.4K    0  360 3.0M 72.24K 71.05G    0  91M 284.3K 5.589T    0 3.0M 67.55K 64.19G
50050763031b448e:40c1403500000000     0  127K   0.1 1.130K   7838 6.1K 1.7K    0  323 3.5M 79.94K 72.32G    0  22M 287.9K 762.4G    0 3.5M 75.47K 69.29G
19:58:37
50050763031b448e:40c1403100000000     0  126K   0.1 1.709K   8611 7.8K  832    0  282  57M 94.52K 864.8G    0  66M 283.7K 3.462T    0 3.8M 76.98K 120.5G
50050763031b448e:40c1403500000000     0 94.1K   0.1 1.489K   7404 6.7K  740    0  318  70M 93.78K 1.396T    0  71M 219.1K 1.579T    0 4.1M 71.35K 99.01G
19:59:37
50050763031b448e:40c1403100000000     0 97.7K   0.1 1.695K   6280 4.9K 1.4K    0  324  45M 124.0K 434.8G    0  47M 363.7K 2.312T    0 3.4M 111.3K 104.1G
50050763031b448e:40c1403500000000     0  109K   0.1 1.153K   7440 5.6K 1.9K    0  383  64M 141.0K 652.3G    0  53M 343.9K 1.452T    0 3.4M 128.1K 107.4G

Note that numbers can be abbreviated if space does not suffice. For example, 3 489 345 is abbreviated as 3.5M.

The report columns have the following meanings:

first column: Device identifier, depends on the -C option.
I/O rt MB/s: Applies to an individual request and its total processing time, including channel latency. Specifies the I/O rate of the device during the interval the request was processed. The min and max entries give the minimum and maximum rate. Given in megabytes per second.
thrp in MB/s: Applies to the entire device and includes all requests. Measures the throughput of the device while active. The avg entry gives the average utilization and the stdev entry gives the standard deviation. Note that because multiple requests are processed at the same time it is possible for avg to be higher than max. Given in megabytes per second.
I/O requests: The number of requests. Bidi represents bi-directional requests.
I/O subsystem latencies: Latencies in the I/O subsystem.
channel latencies: Latencies on the FCP channel.
fabric latencies: Roundtrip time of the request in the fabric.