Sarat Chandra iamd3vil

Moved to git repository: https://github.com/denji/golang-tls

Generate private key (.key)

# Key considerations for algorithm "RSA" ≥ 2048-bit
openssl genrsa -out server.key 2048

# Key considerations for algorithm "ECDSA" ≥ secp384r1
# List ECDSA the supported curves (openssl ecparam -list_curves)

Comparative Benchmark Numbers @ Rackspace

I've taken the benchmarks from Matthew Rothenberg's phoenix-showdown, updated Phoenix to 0.13.1 and ran the tests on the most powerful machines available at Rackspace.

Results

Framework	Throughput (req/s)	Latency (ms)	Consistency (σ ms)

Demonstrate Erlang's 'busy wait' effect on CPU utilization

How?

Just make Erlang to do some light-load task in a bunch of relatively short leaving processes. Calculating PI to 80th digit in batches per 10 procs with short, 8 ms, sleep in-between, to give schedulers a breath space, will do.

Running

Run erl with 8 schedulers and no busy waiting on schedulers at all.

Docker - How to cleanup (unused) resources

Once in a while, you may need to cleanup resources (containers, volumes, images, networks) ...

delete volumes

// see: https://github.com/chadoe/docker-cleanup-volumes

$ docker volume rm $(docker volume ls -qf dangling=true)

$ docker volume ls -qf dangling=true | xargs -r docker volume rm

#Phoenix 1.1.x to 1.2.0 Upgrade Instructions

Project Generator

To generate new projects as 1.2.0, install the new mix archive:

mix archive.install https://github.com/phoenixframework/archives/raw/master/phoenix_new.ez

Deps

If you want a run-down of the 1.3 changes and the design decisions behidn those changes, check out the LonestarElixir Phoenix 1.3 keynote: https://www.youtube.com/watch?v=tMO28ar0lW8

To use the new phx.new project generator, you can install the archive with the following command:

$ mix archive.install https://github.com/phoenixframework/archives/raw/master/phx_new.ez

Bump your phoenix dep

Phoenix v1.3.0 is a backwards compatible release with v1.2.x. To upgrade your existing 1.2.x project, simply bump your phoenix dependency in mix.exs:

	-module(inet_utils).

	-export([inet_aton/1, inet_ntoa/1]).
	-export([ip_between/3]).

	%% @doc Converts a binary string with a human readable ip
	%% address representation into an uint32.
	-spec inet_aton(binary()) -> pos_integer().
	inet_aton(Ip) ->
	[O1Bin, O2Bin, O3Bin, O4Bin] = binary:split(Ip, <<".">>, [global]),

	# You will need fswatch installed (available in homebrew and friends)
	# The command below will run tests and wait until fswatch writes something.
	# The --stale flag will only run stale entries, it requires Elixir v1.3.
	fswatch lib/ test/ \| mix test --stale --listen-on-stdin

	defmodule Config do
	@moduledoc """
	This module handles fetching values from the config with some additional niceties
	"""

	@doc """
	Fetches a value from the config, or from the environment if {:system, "VAR"}
	is provided.

	An optional default value can be provided if desired.

	const express = require('express'),
	bodyParser = require('body-parser'),
	request = require('unirest'),
	app = express();

	app.disable('x-powered-by');
	app.set('env', 'production');

	app.use(bodyParser.json());
	app.use(bodyParser.urlencoded({ extended: true }));