Consul higher performance of a single server than a cluster?

Mr Cai

5/25/23, 5:07 AM

We're using Consul v1.11.1 KV to store some read-mostly data（about 50 bytes per key) . I'm doing performance test on Consul get recently. Frist I use a single server(8CPU Cores,2.4GHz; 16GB RAM; 300G SSD)

wrk -t8 -d30 -c200 http:8500/v1/kv/aa Running 30s test @ http://10.190.4.251:8500/v1/kv/aa

8 threads and 200 connections

Thread Stats Avg Stdev Max +/- Stdev

Latency 2.86ms 2.99ms 55.02ms 88.33%

Req/Sec 10.71k 2.00k 19.79k 69.19% 2565410 requests in 30.09s, 0.93GB read

Requests/sec: 85251.41

Transfer/sec: 31.79MB max cpu 700%

Then I create a cluster with other same configuration server(8CPU Cores,2.4GHz; 16GB RAM; 300G SSD) and build a haproxy for load balancing enter image description here

at this time max cpu 300% per server. the result Running 2m test @ http://10.190.5.152:8999/v1/kv/aa 8 threads and 200 connections Thread Stats Avg Stdev Max +/- Stdev Latency 5.38ms 1.72ms 212.79ms 94.57% Req/Sec 4.68k 388.44 7.27k 84.26% 4474792 requests in 2.00m, 1.63GB read Requests/sec: 37260.15 Transfer/sec: 13.89MB i increase connections but find Non-2xx response.

Running 2m test @ http://10.190.5.152:8999/v1/kv/aa 8 threads and 250 connections Thread Stats Avg Stdev Max +/- Stdev Latency 6.64ms 1.95ms 213.80ms 93.03% Req/Sec 4.70k 466.78 10.65k 82.20% 4485786 requests in 2.00m, 1.63GB read Socket errors: connect 0, read 129, write 0, timeout 0 Non-2xx or 3xx responses: 64 Requests/sec: 37353.78

Higher performance of a single server than a cluster. I don't kown why? Am I using it wrong?

0 + 0

linux

performance

configuration

consul

AlexD

5/25/23, 9:26 AM

You don't need `haproxy` for a `consul` cluster. It is just an unnecessary single point of failure. See the documentation for [reference consul cluster architecture](https://learn.hashicorp.com/tutorials/consul/reference-architecture)

Elon Musk

I sit in a Tesla and translated this thread with Ai:

EN: Consul higher performance of a single server than a cluster?

TH: Consul ประสิทธิภาพที่สูงกว่าของเซิร์ฟเวอร์เดียวมากกว่าคลัสเตอร์?

RO: Consultă performanță mai mare a unui singur server decât a unui cluster?

RU: Consul выше производительность одиночного сервера, чем кластера?

VI: Lãnh sự hiệu suất cao hơn của một máy chủ so với một cụm?

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