Callum Bryant Nixes

Raspberry Pi Zero OTG Mode

Simple guide for setting up OTG modes on the Raspberry Pi Zero - By Andrew Mulholland (gbaman).

The Raspberry Pi Zero (and model A and A+) support USB On The Go, given the processor is connected directly to the USB port, unlike on the B, B+ or Pi 2 B, which goes via a USB hub.
Because of this, if setup to, the Pi can act as a USB slave instead, providing virtual serial (a terminal), virtual ethernet, virtual mass storage device (pendrive) or even other virtual devices like HID, MIDI, or act as a virtual webcam!
It is important to note that, although the model A and A+ can support being a USB slave, they are missing the ID pin (is tied to ground internally) so are unable to dynamically switch between USB master/slave mode. As such, they default to USB master mode. There is no easy way to change this right now.
It is also important to note, that a USB to UART serial adapter is not needed for any of these guides, as may be documented elsewhere across the int

using Ansible command line:

ansible-playbook --connection=local 127.0.0.1 playbook.yml

using inventory:

127.0.0.1 ansible_connection=local

Request Units, Storage Utilization, Splits....oh my!

The Unofficial Throughput and Capacity Guestimate Guide for Azure Cosmos DB

Introduction

I have had a lot of great questions about how to estimate the throughput and storage capacity for Azure Cosmos DB. To get yourself up and running, the key best practices references are:

Request Units in Azure Cosmos DB: This document describes what request units and various considerations.
Estimate Request Units and Data Storage: This tool helps you calculate the throughput and storage requirements you need.
Azure Cosmos DB Local Emulator: Use the Azure Cosmos DB Emulator for local development and testing

	#!/bin/sh
	#This is a simple bash script that will poll github for changes to your repo,
	#if found pull them down, and then rebuild and restart a Jekyll site running
	#in Nginx. Note, we cannot use cron to schedule a job every 5 seconds, so we create
	#a script that executes an infinite loop that sleeps every 5 seconds
	#We run the script with nohup so it executes as a background process: $nohup ./update-jekyll

	while true
	do