tedsuo

Metrics

Questions

• where is time recorded?
• how do we unit test what values we have recorded?

Notes

• instrumentedResponseWriter does not support the http.CloseNotifier interface

tedsuo

#!/bin/bash

set -e -x

apt-get install aufs-tools

pushd $GOPATH_ROOT/src/github.com/cloudfoundry-incubator/warden-linux
  make # compile wshd/etc.
  export WARDEN_BINPATH=$PWD/linux_backend/bin
popd

tedsuo

Decouple Compare and Swap from the serialized Value

if we modify storeadapter#compareAndSwapByIndex to return the new index, we can use this mechanism for our lifecycle/state machines:

type StoreAdapter interface {
  CompareAndSwapByIndex(prevIndex uint64, newNode StoreNode) (newIndex uint64, err error)
}

This would allow our state machines to continue, even if the values changed (provided all versions of the model have a StoreIndex field that we can use). Doesn't solve the issue of our processes expecting the data to be in a different format that the model they currently have, but it does prevent model changes from messing up the state machine.

tedsuo

Cloud Foundry Logging Proposal

Log Format

Each log line corresponds to a line of JSON. This is backward compatible with the existing steno output.

Common among all log-level formats:

{
  timestamp: TIMESTAMP, // formatted as fmt.Sprintf("%.9f", time.Now().UnixNano()) / 1e9)

tedsuo

○ → brew install -v go --cross-compile-common
==> Downloading https://go.googlecode.com/files/go1.1.2.src.tar.gz
Already downloaded: /Library/Caches/Homebrew/go-1.1.2.tar.gz
tar xf /Library/Caches/Homebrew/go-1.1.2.tar.gz
==> ./make.bash --no-clean
./make.bash --no-clean
# Building C bootstrap tool.
cmd/dist

# Building compilers and Go bootstrap tool for host, darwin/amd64.

tedsuo

   function combinator(func,data,args){
      new_args = [data].concat(args);
      return function(cb){
        new_args.push(cb);
        func.apply(this,new_args);
      }
   }
  
  function getCell(data,row_id,col_id,cb){

tedsuo

module.exports = test_data = {
  defaults:{
    protocol: 'http',
    host: 'target-site.com',
    port: 80
  },
  requests:[
    {method:'get', path:'/test', weight:200},
    {method:'post', path:'/foo', body:'bar=false', weight:5},
    {method:'post', path:'/bar', body:'foo=true', weight:10},