aphyr

Hi S-------. I'm not an expert in performance benchmarking--I focus on 
correctness and safety--but I have a few pieces of advice here.

0. Pick multiple workloads that cover the gamut of behaviors in each DB.  
*Don't* choose a completely sharded workload for VoltDB. Don't choose a 
purely commutative workload for Cassandra. Cassandra's Paxos 
implementation is slow and a good benchmark will demonstrate 
that--however, it *doesn't* (I think?) require a global coordinator, 
which means it might *scale* better than a single-coordinator system 
like, say, VoltDB. Talk about those differences!

tenderlove

#!/bin/sh

# Reboot netgear CM400 cablemodem via curl

curl -s -u admin:password 'http://192.168.100.1'$(curl -s -u admin:password http://192.168.100.1/RouterStatus.htm | grep id=[0-9] | cut -d'"' -f2) --data 'buttonSelect=2&wantype=dhcp&enable_apmode=0' > /dev/null

JoshCheek

Ruby in place of sed / awk

One of Ruby's major influences was Perl, leaving well equipped to replace bash, sed, and awk. Lets take a look at how to do that.

The -e flag

JoshCheek

# video @ https://vimeo.com/217144282
require 'graphics'

class Walkers < Graphics::Simulation
  def initialize
    super 800, 600, 24
    color.default_proc = -> h, k { k }
    @walkers = 50.times.map do
      length = 15
      colour = [

antirez

# LVDB - LLOOGG Memory DB
# Copyriht (C) 2009 Salvatore Sanfilippo <[email protected]>
# All Rights Reserved

# TODO
# - cron with cleanup of timedout clients, automatic dump
# - the dump should use array startsearch to write it line by line
#   and may just use gets to read element by element and load the whole state.
# - 'help','stopserver','saveandstopserver','save','load','reset','keys' commands.
# - ttl with milliseconds resolution 'ttl a 1000'. Check ttl in dump!

chrismccord

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:

JoshCheek

node_modules

danielberkompas

defmodule MyApp.Scheduler do
  @moduledoc """
  Schedules a Mix task to be run at a given interval in milliseconds.

  ## Options

  - `:task`: The name of the Mix task to run.
  - `:args`: A list of arguments to pass to the Mix task's `run/1` function.
  - `:interval`: The time interval in millisconds to rerun the task.

mislav

#!/bin/bash
set -e

droplet=netflix
interface=Wi-Fi
us_regions=( nyc1 nyc2 nyc3 )

random_region() {
  echo ${us_regions[RANDOM % ${#us_regions[@]}]}
}

vasanthk

System Design Cheatsheet

Picking the right architecture = Picking the right battles + Managing trade-offs

Basic Steps

1. Clarify and agree on the scope of the system

• User cases (description of sequences of events that, taken together, lead to a system doing something useful)
  • Who is going to use it?
  • How are they going to use it?