ab

AB

• Void HTTP Server
• Load

Usage

• cd server && go run main.go to start a http server on localhost:8000, everything is hard coded, https code is commented out.
• cd ab && go run main.go to make request to localhost:8000, everything is hard coded right now

Key points

• go lang currency
• net/http/httptrace
• aggregate data

TODO

• the QPS in hey means QPS per worker?
• timeout in both client and server https://blog.cloudflare.com/the-complete-guide-to-golang-net-http-timeouts/

NOTE

• need to change the file descriptor. ulimit -n show current one ulimit -n 4096 to set limit in current shell.
• the max file descriptor can be found using cat /proc/sys/fs/file-max
• invalid memory address or nil pointer dereference, response can be nil when err is not nil
• need to call res.Body.Close() so both server and client and release resource to avoid file descriptor running out.
• MUST make shallow copy of request, otherwise res.Body.Close() would cause all the reuqest being cancelled
• connect: cannot assign requested address golang/go#16012 seems need to set maxidle connection per host run ab/ab/main serveral times and this problem will appear
  • OS does not release port right after the connection is closed
  • running hey several times does not have this problem
  • need to specify transport for client in order to reuse connection (TODO: why not do it by default)

Ref

• https://github.com/rakyll/hey