Helio Campos Mello de Andrade HelioCampos

Database migration best practices for Rails

Never ever change data on schema changes! [1]

Use rake tasks to change the data! [1]

This decouples a deployment from completed migrations. Give us control of the data manipulation proccess by encapsulatin it in on place. need to remember to:

Run it in one of the ways bellow: a. Add this rake task the deployment script or;

= Tuning unicorn

unicorn performance is generally as good as a (mostly) Ruby web server can provide. Most often the performance bottleneck is in the web application running on Unicorn rather than Unicorn itself.

== unicorn Configuration

See Unicorn::Configurator for details on the config file format. +worker_processes+ is the most-commonly needed tuning parameter.

Introdução ao Bitcoin

Canais no youtube sobre bitcoin e análise de ações

Namespaces & Cgroups

Introduction to Linux namespaces - Part 1: UTS
Introduction to Linux namespaces - Part 2: IPC
Introduction to Linux namespaces - Part 3: PID
Introduction to Linux namespaces - Part 4: NS (FS)
Introduction to Linux namespaces – Part 5: NET
Bê-á-bá dos cgroups, parte 1: escalonador e prioridades
[Bê-á-bá dos cgroups, parte 2: montagem e "pinning" de CPU](https://www.ibm.com/developerworks/community/blo

	[default]
	access_key = asf
	bucket_location = US
	cloudfront_host = cloudfront.amazonaws.com
	cloudfront_resource = /2010-07-15/distribution
	default_mime_type = binary/octet-stream
	delete_removed = False
	dry_run = False
	encoding = UTF-8
	encrypt = False

	# This gist is compatible with Ansible 1.x .
	# For Ansible 2.x , please check out:
	# - https://gist.github.com/dmsimard/cd706de198c85a8255f6
	# - https://github.com/n0ts/ansible-human_log

	# This program is free software: you can redistribute it and/or modify
	# it under the terms of the GNU General Public License as published by
	# the Free Software Foundation, either version 3 of the License, or
	# (at your option) any later version.
	#

	#!/bin/bash

	# Script to backup git repo to S3
	# Set bucket, dir, password and account to use for the backup. I keep mine in local env vars
	# These are set by localrc which lives on an encrypted home directory and is executed by my bashrc
	bucket=$GITHUB_BACKUP_BUCKET
	dir=$GITHUB_BACKUP_DIR
	password=$GITHUB_BACKUP_PASSWORD
	account=$GITHUB_ACCOUNT

	#!/usr/bin/python
	#
	# Usage: packer-config my-template.yaml \| packer build -
	#
	# Constructs a Packer JSON configuration file from the specified YAML
	# template file and writes it to STDOUT.
	#
	# The YAML template format adds some flexibility and readability by
	# adding comments and an !include directive, allowing for the
	# following template syntax:

	#!/usr/bin/env bash
	#
	# gh-dl-release! It works!
	#
	# This script downloads an asset from latest or specific Github release of a
	# private repo. Feel free to extract more of the variables into command line
	# parameters.
	#
	# PREREQUISITES
	#

	function drips(){
	docker ps -q \| xargs -n 1 docker inspect --format '{{ .NetworkSettings.IPAddress }} {{ .Name }}' \| sed 's/ \// /'
	}