lamont-granquist

This has been moved into the official Chef docs:

https://docs.chef.io/custom_resources_notes.html

12.5 style custom resources

This is by far the most recommended way of writing resources for all users. There are two gotchas which we're working through:

1. For helper functions that you used to write in your provider code or used to mixin to your provider code, you have to use an action_class do ... end block.

bspindler

e24a5c8f584c38001ead4767a5cc352a

cattywampus

#!/usr/bin/env ruby

def red(string)
  "\e[37;41m#{string}\e[0m"
end

def white(string)
  "\e[30;47m#{string}\e[0m"
end

galenemery

# On the remote node/server:
 
winrm quickconfig -q
 
winrm set winrm/config/winrs '@{MaxMemoryPerShellMB="300"}'
 
winrm set winrm/config '@{MaxTimeoutms="1800000"}'
 
# When NOT USING a domain-based authentication (i.e., from Linux/Unix to Windows node):
winrm set winrm/config/service/auth '@{Basic="true"}'

karledurante

require 'sphero'
require 'pry'

FORWARD = 0
RIGHT = 90
BACKWARD = 180
LEFT = 270

SLOW = 100
FAST = 200

ashrithr

Introduction to Kafka

Kafka acts as a kind of write-ahead log (WAL) that records messages to a persistent store (disk) and allows subscribers to read and apply these changes to their own stores in a system appropriate time-frame.

Terminology:

• Producers send messages to brokers
• Consumers read messages from brokers
• Messages are sent to a topic

hellerbarde

Latency numbers every programmer should know

L1 cache reference ......................... 0.5 ns
Branch mispredict ............................ 5 ns
L2 cache reference ........................... 7 ns
Mutex lock/unlock ........................... 25 ns
Main memory reference ...................... 100 ns             
Compress 1K bytes with Zippy ............. 3,000 ns  =   3 µs
Send 2K bytes over 1 Gbps network ....... 20,000 ns  =  20 µs
SSD random read ........................ 150,000 ns  = 150 µs

Read 1 MB sequentially from memory ..... 250,000 ns = 250 µs

mnylen

$ rvm use 1.8.7-p302
$ wget http://subversion.tigris.org/downloads/subversion-1.6.15.tar.gz
$ tar -xzf subversion-1.6.15.tar.gz && cd subversion-1.6.15
$ ./configure --with-ruby-sitedir=~/.rvm/rubies/ruby-1.8.7-p302/lib/ruby --without-berkeley-db
$ make swig-rb && make install-swig-rb

To test things out:
$ irb
ruby-1.8.7-p302 > require 'svn/client'
=> true