X-Git-Url: https://gerrit.fd.io/r/gitweb?a=blobdiff_plain;f=docs%2Freport%2Fintroduction%2Fmethodology_reconf.rst;h=1a1f4cc98c949fc0cac4ea8bd66802aa00840cdd;hb=5814b1228cbb3a81401021ecfb053c9bd82b99f1;hp=32e0fd7561dccf21040dba7e4367651e57b83cf2;hpb=2fc48e8d0a4712ec99dd2bb3a814ec9cb2bc12cf;p=csit.git diff --git a/docs/report/introduction/methodology_reconf.rst b/docs/report/introduction/methodology_reconf.rst index 32e0fd7561..1a1f4cc98c 100644 --- a/docs/report/introduction/methodology_reconf.rst +++ b/docs/report/introduction/methodology_reconf.rst @@ -25,7 +25,7 @@ with somewhat long durations, and the re-configuration process can also be long, finding an offered load which would result in zero loss during the re-configuration process would be time-consuming. -Instead, reconf tests find a througput value (lower bound for NDR) +Instead, reconf tests first find a througput value (lower bound for NDR) without re-configuration, and then maintain that ofered load during re-configuration. The measured loss count is then assumed to be caused by the re-configuration process. The result published by reconf tests @@ -38,16 +38,16 @@ Current Implementation Each reconf suite is based on a similar MLRsearch performance suite. MLRsearch parameters are changed to speed up the throughput discovery. -For example, PDR is not searched for, and final trial duration is shorter. +For example, PDR is not searched for, and the final trial duration is shorter. The MLRsearch suite has to contain a configuration parameter -that can be scaled up, e.g. number of routes or number of service chains. +that can be scaled up, e.g. number of tunnels or number of service chains. Currently, only increasing the scale is supported as the re-configuration operation. In future, scale decrease or other operations can be implemented. The traffic profile is not changed, so the traffic present is processed -only by the smaller scale configuration. The added routes / chains +only by the smaller scale configuration. The added tunnels / chains are not targetted by the traffic. For the re-configuration, the same Robot Framework and Python libraries @@ -73,6 +73,3 @@ are expected without re-configuration. But different suites show different allowing full NIC buffers to drain quickly between worker pauses. For other suites, lower bound for NDR still has quite a large probability of non-zero packet loss even without re-configuration. - -But the results show very high effective blocked time, -so the two objections related to NDR lower bound are negligible in comparison.