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Setup redis-cli on AWS EC2

SSH into your EC2 instance. Run the following:

$ sudo yum install gcc This may return an "already installed" message. That's OK.

$ wget http://download.redis.io/redis-stable.tar.gz && tar xvzf redis-stable.tar.gz && cd redis-stable && make

See: http://docs.aws.amazon.com/AmazonElastiCache/latest/UserGuide/GettingStarted.ConnectToCacheNode.Redis.html

What I Wish I'd Known About Equity Before Joining A Unicorn

Disclaimer: This piece is written anonymously. The names of a few particular companies are mentioned, but as common examples only.

This is a short write-up on things that I wish I'd known and considered before joining a private company (aka startup, aka unicorn in some cases). I'm not trying to make the case that you should never join a private company, but the power imbalance between founder and employee is extreme, and that potential candidates would

Akka Streams Backpressure Gauge

Measures if there is backpressure on an Akka Stream at the given stage.

Motivation

When an Akka Stream doesn't perform as intended, it is difficult to tell where the bottleneck is, since all stages operate at the same rate (see e.g. here ).

So when things are not fast as expected, this pressure gauge can help you to narrow down on the slow stage. Imagine

	package com.hashcomparisons;

	import java.security.MessageDigest;
	import java.util.Random;
	import org.apache.commons.lang.RandomStringUtils;

	public class CompareMD5AndMurmur {

	public static void main(String[] args) {
	String[] strings = generateRandomStrings(300, 50, 500);

	var parser = document.createElement('a');
	parser.href = "http://example.com:3000/pathname/?search=test#hash";

	parser.protocol; // => "http:"
	parser.hostname; // => "example.com"
	parser.port; // => "3000"
	parser.pathname; // => "/pathname/"
	parser.search; // => "?search=test"
	parser.hash; // => "#hash"
	parser.host; // => "example.com:3000"

	/**
	* Copyright (C) 2009-2014 Typesafe Inc. <http://www.typesafe.com>
	*/
	package akka.contrib.mailbox

	import scala.concurrent.duration._
	import java.util.concurrent.atomic.AtomicInteger
	import java.util.concurrent.atomic.AtomicLong
	import com.typesafe.config.Config
	import akka.actor.{ ActorContext, ActorRef, ActorSystem, ExtendedActorSystem }