Physical machines

GCE n1-highcpu-2 machine type

  • 1x dedicated local SSD mounted under /var/lib/etcd
  • 1x dedicated slow disk for the OS
  • 1.8 GB memory
  • 2x CPUs
  • etcd version 2.2.0

etcd Cluster

1 etcd member running in v3 demo mode

Testing

Use etcd v3 benchmark tool.

Performance

reading one single key

key size in bytesnumber of clientsread QPS90th Percentile Latency (ms)
256127160.4
25664166236.1
2562561662221.7

The performance is nearly the same as the one with empty server handler.

reading one single key after putting

key size in bytesnumber of clientsread QPS90th Percentile Latency (ms)
256122690.5
25664135828.6
2562561326247.5

The performance with empty server handler is not affected by one put. So theperformance downgrade should be caused by storage package.