docs/yardstick/02-methodology.rst

   1 ===========
   2 Methodology
   3 ===========
   4
   5 Abstract
   6 ========
   7
   8 This chapter describes the methodology implemented by the Yardstick project for
   9 verifying the NFV Infrastructure from the perspective of a VNF.
  10
  11 ETSI-NFV
  12 ========
  13
  14 .. _NFV-TST001: https://docbox.etsi.org/ISG/NFV/Open/Drafts/TST001_-_Pre-deployment_Validation/
  15
  16 The document ETSI GS NFV-TST001_, "Pre-deployment Testing; Report on Validation
  17 of NFV Environments and Services", recommends methods for pre-deployment
  18 testing of the functional components of an NFV environment.
  19
  20 The Yardstick project implements the methodology described in chapter 6, "Pre-
  21 deployment validation of NFV infrastructure".
  22
  23 The methodology consists in decomposing the typical VNF work-load performance
  24 metrics into a number of characteristics/performance vectors, which each can be
  25 represented by distinct test-cases.
  26
  27 The methodology includes five steps:
  28
  29 * *Step1:* Define Infrastruture - the HW, SW and corresponding configuration
  30    target for validation; the OPNFV infrastructure, in OPNFV community labs.
  31
  32 * *Step2:* Identify VNF type - the application for which the infrastructure is
  33    to be validated, and its requirements on the underlying infrastructure.
  34
  35 * *Step3:* Select test cases - depending on the workload that represents the
  36    application for which the infrastruture is to be validated, the relevant
  37    test cases amongst the list of available Yardstick test cases.
  38
  39 * *Step4:* Execute tests - define the duration and number of iterations for the
  40    selected test cases, tests runs are automated via OPNFV Jenkins Jobs.
  41
  42 * *Step5:* Collect results - using the common API for result collection.
  43
  44 Metrics
  45 =======
  46
  47 The metrics, as defined by ETSI GS NFV-TST001, are shown in
  48 :ref:`Table1 <table2_1>`, :ref:`Table2 <table2_2>` and
  49 :ref:`Table3 <table2_3>`.
  50
  51 In OPNFV Brahmaputra release, generic test cases covering aspects of the listed
  52 metrics are available; further OPNFV releases will provide extended testing of
  53 these metrics.
  54 The view of available Yardstick test cases cross ETSI definitions in
  55 :ref:`Table1 <table2_1>`, :ref:`Table2 <table2_2>` and :ref:`Table3 <table2_3>`
  56 is shown in :ref:`Table4 <table2_4>`.
  57 It shall be noticed that the Yardstick test cases are examples, the test
  58 duration and number of iterations are configurable, as are the System Under
  59 Test (SUT) and the attributes (or, in Yardstick nomemclature, the scenario
  60 options).
  61
  62 .. _table2_1:
  63
  64 **Table 1 - Performance/Speed Metrics**
  65
  66 +---------+-------------------------------------------------------------------+
  67 | Category| Performance/Speed                                                 |
  68 |         |                                                                   |
  69 +---------+-------------------------------------------------------------------+
  70 | Compute | * Latency for random memory access                                |
  71 |         | * Latency for cache read/write operations                         |
  72 |         | * Processing speed (instructions per second)                      |
  73 |         | * Throughput for random memory access (bytes per second)          |
  74 |         |                                                                   |
  75 +---------+-------------------------------------------------------------------+
  76 | Network | * Throughput per NFVI node (frames/byte per second)               |
  77 |         | * Throughput provided to a VM (frames/byte per second)            |
  78 |         | * Latency per traffic flow                                        |
  79 |         | * Latency between VMs                                             |
  80 |         | * Latency between NFVI nodes                                      |
  81 |         | * Packet delay variation (jitter) between VMs                     |
  82 |         | * Packet delay variation (jitter) between NFVI nodes              |
  83 |         |                                                                   |
  84 +---------+-------------------------------------------------------------------+
  85 | Storage | * Sequential read/write IOPS                                      |
  86 |         | * Random read/write IOPS                                          |
  87 |         | * Latency for storage read/write operations                       |
  88 |         | * Throughput for storage read/write operations                    |
  89 |         |                                                                   |
  90 +---------+-------------------------------------------------------------------+
  91
  92 .. _table2_2:
  93
  94 **Table 2 - Capacity/Scale Metrics**
  95
  96 +---------+-------------------------------------------------------------------+
  97 | Category| Capacity/Scale                                                    |
  98 |         |                                                                   |
  99 +---------+-------------------------------------------------------------------+
 100 | Compute | * Number of cores and threads- Available memory size              |
 101 |         | * Cache size                                                      |
 102 |         | * Processor utilization (max, average, standard deviation)        |
 103 |         | * Memory utilization (max, average, standard deviation)           |
 104 |         | * Cache utilization (max, average, standard deviation)            |
 105 |         |                                                                   |
 106 +---------+-------------------------------------------------------------------+
 107 | Network | * Number of connections                                           |
 108 |         | * Number of frames sent/received                                  |
 109 |         | * Maximum throughput between VMs (frames/byte per second)         |
 110 |         | * Maximum throughput between NFVI nodes (frames/byte per second)  |
 111 |         | * Network utilization (max, average, standard deviation)          |
 112 |         | * Number of traffic flows                                         |
 113 |         |                                                                   |
 114 +---------+-------------------------------------------------------------------+
 115 | Storage | * Storage/Disk size                                               |
 116 |         | * Capacity allocation (block-based, object-based)                 |
 117 |         | * Block size                                                      |
 118 |         | * Maximum sequential read/write IOPS                              |
 119 |         | * Maximum random read/write IOPS                                  |
 120 |         | * Disk utilization (max, average, standard deviation)             |
 121 |         |                                                                   |
 122 +---------+-------------------------------------------------------------------+
 123
 124 .. _table2_3:
 125
 126 **Table 3 - Availability/Reliability Metrics**
 127
 128 +---------+-------------------------------------------------------------------+
 129 | Category| Availability/Reliability                                          |
 130 |         |                                                                   |
 131 +---------+-------------------------------------------------------------------+
 132 | Compute | * Processor availability (Error free processing time)             |
 133 |         | * Memory availability (Error free memory time)                    |
 134 |         | * Processor mean-time-to-failure                                  |
 135 |         | * Memory mean-time-to-failure                                     |
 136 |         | * Number of processing faults per second                          |
 137 |         |                                                                   |
 138 +---------+-------------------------------------------------------------------+
 139 | Network | * NIC availability (Error free connection time)                   |
 140 |         | * Link availability (Error free transmission time)                |
 141 |         | * NIC mean-time-to-failure                                        |
 142 |         | * Network timeout duration due to link failure                    |
 143 |         | * Frame loss rate                                                 |
 144 |         |                                                                   |
 145 +---------+-------------------------------------------------------------------+
 146 | Storage | * Disk availability (Error free disk access time)                 |
 147 |         | * Disk mean-time-to-failure                                       |
 148 |         | * Number of failed storage read/write operations per second       |
 149 |         |                                                                   |
 150 +---------+-------------------------------------------------------------------+
 151
 152 .. _table2_4:
 153
 154 **Table 4 - Yardstick Generic Test Cases**
 155
 156 +---------+-------------------+----------------+------------------------------+
 157 | Category| Performance/Speed | Capacity/Scale | Availability/Reliability     |
 158 |         |                   |                |                              |
 159 +---------+-------------------+----------------+------------------------------+
 160 | Compute | TC003             | TC003          |  TC013 [1]_                  |
 161 |         | TC004             | TC004          |  TC015 [1]_                  |
 162 |         | TC014             | TC010          |                              |
 163 |         | TC024             | TC012          |                              |
 164 |         |                   |                |                              |
 165 +---------+-------------------+----------------+------------------------------+
 166 | Network | TC002             | TC001          |  TC016 [1]_                  |
 167 |         | TC011             | TC008          |  TC018 [1]_                  |
 168 |         |                   | TC009          |                              |
 169 |         |                   |                |                              |
 170 +---------+-------------------+----------------+------------------------------+
 171 | Storage | TC005             | TC005          |  TC017 [1]_                  |
 172 |         |                   |                |                              |
 173 +---------+-------------------+----------------+------------------------------+
 174
 175 .. note:: The description in this OPNFV document is intended as a reference for
 176   users to understand the scope of the Yardstick Project and the
 177   deliverables of the Yardstick framework. For complete description of
 178   the methodology, refer to the ETSI document.
 179
 180 .. rubric:: Footnotes
 181 .. [1] To be included in future deliveries.