Performance Metrics
CDN provides stable acceleration and relieves pressure on origin servers. You can view performance metrics before and after CDN is used to check the acceleration effect.
Common Metrics
The following table lists CDN common metrics.
![](https://support.huaweicloud.com/intl/es-us/productdesc-cdn/public_sys-resources/note_3.0-es-us.png)
- When CDN is used, the latency, packet loss rate, and retrieval ratio decrease, whereas the cache hit ratio increases. However, the acceleration performance varies between service scenarios and types, even if the CDN configuration is the same. Therefore, this topic provides only qualitative indicators for your references.
- If you do not use CDN, the retrieval ratio is 100% and the cache hit ratio is 0.
Acceleration Case
This test uses the universal test method in the industry. The service provider is Tingyun. Test objects are HUAWEI CLOUD OBS buckets and HUAWEI CLOUD CDN. Test carriers are China Unicom and China Telecom.
- Latency
- Availability
The availability of OBS buckets and CDN is 100%.
- Detailed data
Time
OBS
CDN
Latency
Availability
Number of Monitoring Sites
Latency
Availability
Number of Monitoring Sites
Nov 18 15:12
1.149
100
57
1.227
100
62
Nov 18 16:12
1.075
100
167
0.616
100
169
Nov 18 17:12
0.867
100
172
0.433
100
171
Nov 18 18:12
0.7
100
169
0.321
100
169
Nov 18 19:12
0.94
100
173
0.534
100
173
Nov 18 20:12
1.119
100
176
0.765
100
176
Nov 18 21:12
0.841
100
175
0.609
100
176
Nov 18 22:12
0.983
100
181
0.682
100
180
Nov 18 23:12
0.923
100
173
0.58
100
174
Nov 19 00:12
1.08
100
184
0.737
100
184
Nov 19 01:12
1.147
100
180
0.812
100
178
Nov 19 02:12
1.29
100
181
0.853
100
183
Nov 19 03:12
1.041
100
177
0.617
100
176
Nov 19 04:12
1.339
100
184
0.997
100
184
Nov 19 05:12
1.035
100
179
0.74
100
179
Nov 19 06:12
0.865
100
180
0.566
100
181
Nov 19 07:12
1.258
100
176
1.071
100
175
Nov 19 08:12
1.338
100
170
0.878
100
170
Nov 19 09:12
1.085
100
155
0.705
100
155
Nov 19 10:12
1.213
100
168
0.822
100
169