CarlosEspejo

Keybase proof

I hereby claim:

• I am carlosespejo on github.
• I am awcarlos (https://keybase.io/awcarlos) on keybase.
• I have a public key ASC2JMFchy46ahF4d2Vnp6L4kTL2IplOUR0BaJTFzaM7fAo

To claim this, I am signing this object:

CarlosEspejo

require 'fileutils'

class Encoder
  attr_reader :processed, :search_path, :queue

  def initialize
    @search_path = '/mnt/data/media'
    @processed = File.readlines('encode.log') if File.exists?('encode.log')
    @processed = Array(processed).map(&:chomp)
    @queue = Dir.glob("#{search_path}/**/*.avi").sort

CarlosEspejo

# Borrowed from this talk
# https://www.youtube.com/watch?v=dBeXS5aFLNc
# http://jberkus.github.io/performance_in_15_min/index.html?utm_source=postgresweekly&utm_medium=email#37
# Thank you Josh!!

# Memory Settings
shared_buffers = 2GB # RAM/4 up to 8GB

work_mem = 32MB # limit: RAM/(max_connections/2)
                # 8MB to 32MB: web

CarlosEspejo

#!/bin/bash

# This script will create a compressed data dump 
# that can be restored in parallel using 
# pg_restore -C -j[num of cores]  -d postgres 2015-09-30-app_db.dump
# note: when -C is present the db in -d is used only to make the connection.
# http://www.postgresql.org/docs/current/static/app-pgrestore.html
# http://www.postgresql.org/docs/current/static/app-pgdump.html

DATABASE_NAME=app_db

CarlosEspejo

Systemd

sample.service file you have to copy it to /etc/systemd/system

Set it to auto start

sudo systemctl enable sample.service

Troubleshoot

CarlosEspejo

Ubuntu 15.04 
sudo apt-get install numactl

# Open systemd file
# find /etc/systemd/ | grep -i mongo
/etc/systemd/system/multi-user.target.wants/mongod.service


[Unit]
Description=An object/document-oriented database

CarlosEspejo

# Look into
# Explicitly define PATH at the top of your crontab file:

PATH=/Users/deployer/.rbenv/shims:/usr/local/bin:/usr/local/sbin:/usr/bin:/bin:/usr/sbin:/sbin

Or

export PATH=~/.rbenv/shims:~/.rbenv/bin:"$PATH"

CarlosEspejo

sudo cat /proc/[pid]/environ  | tr '\0' '\n'

CarlosEspejo

  disable_ddl_transaction!
  
  def up
    add_column :users, :processed, :boolean
    change_column :users, :processed, :boolean, default: false
    execute 'update users set processed = false where processed is null'
    add_index :users, :processed, where: 'processed = false', algorithm: :concurrently
  end

CarlosEspejo

Auto mounting drives on boot /etc/fstab

https://help.ubuntu.com/community/Fstab

helpful commands

sudo lsblk # list block devices
sudo blkid # Get block device UUID
sudo mount -a # will try to mount everything and throw errors if fstab is screwed up.