All:
I have a very simple HelloWorld REST API server in go and a corresponding
Go client. The objective is to see benchmark -- i.e. what is the most TPS
a Go server can support. I used tcpdumo to see the exchanges. I was
expecting to see just my restapiserver:8080 but I see some w/
restapiserver.webcache. See below:
What is <server>.webcache? Is this an artifact of go http server?
2018-05-19 16:53:58.446704 IP (tos 0x0, ttl 53, id 0, offset 0, flags [DF],
proto TCP (6), length 52)
10.39.195.205.60731 > restapiserver.webcache: Flags [.], cksum 0x8b1f
(correct), seq 1249, ack 1633, win 4091, options [nop,nop,TS val 2332993641
ecr 993529662], length 0
2018-05-19 16:53:58.446794 IP (tos 0x0, ttl 53, id 0, offset 0, flags [DF],
proto TCP (6), length 156)
10.39.195.205.60731 > restapiserver.webcache: Flags [P.], cksum 0x7d18
(correct), seq 1249:1353, ack 1633, win 4096, options [nop,nop,TS val
2332993641 ecr 993529662], length 104: HTTP, length: 104
GET /HelloWorld HTTP/1.1
Host: restapiserver:8080
User-Agent: Go-http-client/1.1
Accept-Encoding: gzip
2018-05-19 16:53:58.446994 IP (tos 0x0, ttl 64, id 29113, offset 0, flags
[DF], proto TCP (6), length 188)
restapiserver.webcache > 10.39.195.205.60731: Flags [P.], cksum 0x6319
(incorrect -> 0x52e6), seq 1633:1769, ack 1353, win 210, options
[nop,nop,TS val 993529843 ecr 2332993641], length 136: HTTP, length: 136
HTTP/1.1 200 OK
Content-Type: application/json
Date: Sat, 19 May 2018 23:53:58 GMT
Content-Length: 28
{"Greetings":"Hello World"}
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