Stephen Houser stephenhouser

If you'd like to experiment with Terraform on macOS locally, a great provider for doing so is the Docker provider. You can get set up in a few simple steps, like so:

1. Install Docker

Install Docker for Mac if you have not already.

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

	#!/bin/sh
	#
	# Author: Luis Felipe Domínguez Vega <ldominguezvega@gmail.com>
	#
	# Program to use with the rate software to send to InfluxDB the
	# rate of each IP on interface
	#
	# rate_to_influx <influxdb_url> <influxdb_database> <local_network> <interface>
	# rate_to_influx http://127.0.0.1:8086 network 192.168.0.0/24 re1

	#!/bin/sh

	# Set the macOS installer path as a variable
	MACOS_INSTALLER="/Applications/$(ls /Applications \| grep "Install macOS")"
	MOUNT_POINT="$MACOS_INSTALLER/Contents/SharedSupport"
	echo "macOS installer is \"$MACOS_INSTALLER\""

	# Set the target disk as a variable
	TARGET=$(diskutil info "$(bless --info --getBoot)" \| awk -F':' '/Volume Name/ { print $2 }' \| sed -e 's/^[[:space:]]*//')
	echo "Target disk is \"$TARGET\""