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|
*************************************
Yardstick Test Case Description TC002
*************************************
.. _cirros-image: https://download.cirros-cloud.net
+-----------------------------------------------------------------------------+
|Network Latency |
| |
+--------------+--------------------------------------------------------------+
|test case id | OPNFV_YARDSTICK_TC002_NW LATENCY |
| | |
+--------------+--------------------------------------------------------------+
|metric | RTT, Round Trip Time |
| | |
+--------------+--------------------------------------------------------------+
|test purpose | To do a basic verification that network latency is within |
| | acceptable boundaries when packets travel between hosts |
| | located on same or different compute blades. |
| | The purpose is also to be able to spot trends. Test results, |
| | graphs and similar shall be stored for comparison reasons and|
| | product evolution understanding between different OPNFV |
| | versions and/or configurations. |
| | |
+--------------+--------------------------------------------------------------+
|configuration | file: opnfv_yardstick_tc002.yaml |
| | |
| | Packet size 100 bytes. Total test duration 600 seconds. |
| | One ping each 10 seconds. SLA RTT is set to maximum 10 ms. |
| | |
+--------------+--------------------------------------------------------------+
|test tool | ping |
| | |
| | Ping is normally part of any Linux distribution, hence it |
| | doesn't need to be installed. It is also part of the |
| | Yardstick Docker image. |
| | (For example also a Cirros image can be downloaded from |
| | cirros-image_, it includes ping) |
| | |
+--------------+--------------------------------------------------------------+
|references | Ping man page |
| | |
| | ETSI-NFV-TST001 |
| | |
+--------------+--------------------------------------------------------------+
|applicability | Test case can be configured with different packet sizes, |
| | burst sizes, ping intervals and test duration. |
| | SLA is optional. The SLA in this test case serves as an |
| | example. Considerably lower RTT is expected, and |
| | also normal to achieve in balanced L2 environments. However, |
| | to cover most configurations, both bare metal and fully |
| | virtualized ones, this value should be possible to achieve |
| | and acceptable for black box testing. Many real time |
| | applications start to suffer badly if the RTT time is higher |
| | than this. Some may suffer bad also close to this RTT, while |
| | others may not suffer at all. It is a compromise that may |
| | have to be tuned for different configuration purposes. |
| | |
+--------------+--------------------------------------------------------------+
|pre-test | The test case image needs to be installed into Glance |
|conditions | with ping included in it. |
| | |
| | No POD specific requirements have been identified. |
| | |
+--------------+--------------------------------------------------------------+
|test sequence | description and expected result |
| | |
+--------------+--------------------------------------------------------------+
|step 1 | The hosts are installed, as server and client. Ping is |
| | invoked and logs are produced and stored. |
| | |
| | Result: Logs are stored. |
| | |
+--------------+--------------------------------------------------------------+
|test verdict | Test should not PASS if any RTT is above the optional SLA |
| | value, or if there is a test case execution problem. |
| | |
+--------------+--------------------------------------------------------------+
|
