Help needed invoking multiple addresses

[sebastienros]

I'd like to create a LUA script which would invoke different addresses (not paths) each assigned to a thread. It would be similar to the addr.lua script that is provided as a sample, but using specific addresses instead of doing using the lookup method. The goal is to spread the load on different ports of the same server.

I am thinking that these addresses could come from the script arguments, or from a port range taken out of the main addr argument. My issue is that these come as strings, and the thread requires and addr type. I don't understand how to do that with the LUA extensibility. I found a parse_url method in the source but it's not available to the LUA host AFAIK.

[SteveLauC]

This issue #137 may help you.

I know nothing about lua, but in my case, the following script seems to work:

local addrs = { wrk.lookup("10.0.0.3","11451")[1], wrk.lookup("10.0.0.3","11452")[1] }

function setup(thread)
    random_idx = math.random(#addrs)
    thread.addr = addrs[random_idx]
    print("I will benchmark against: ", thread.addr)
end

$ wrk -s addr.lua -d 30 -t 5 -c 500 http://10.0.0.3:11451/_search
I will benchmark against:       10.0.0.3:11452
I will benchmark against:       10.0.0.3:11452
I will benchmark against:       10.0.0.3:11452
I will benchmark against:       10.0.0.3:11452
I will benchmark against:       10.0.0.3:11451
Running 30s test @ http://10.0.0.3:11451/_search
  5 threads and 500 connections
  Thread Stats   Avg      Stdev     Max   +/- Stdev
    Latency    11.74ms   14.23ms 180.23ms   81.94%
    Req/Sec    15.22k    16.62k   87.27k    90.00%
  2271156 requests in 30.07s, 280.64MB read
Requests/sec:  75520.65
Transfer/sec:      9.33MB

[sebastienros]

@SteveLauC thanks a lot for this example, will try build from there.

I know nothing about Lua

Right ;)