fracasula

package main

// Here's a simple example to show how to properly terminate multiple go routines by using a context.
// Thanks to the WaitGroup we'll be able to end all go routines gracefully before the main function ends.

import (
	"context"
	"fmt"
	"math/rand"
	"os"

ervinb

#!/bin/bash

regions=(local ca-central-1 eu-central-1 ap-southeast-1 ap-northeast-1 us-east-1)

image_name_base="cache-bench"
image_sizes_in_mb=(64 512 1024)

dockerfile="Dockerfile.sample"
log_file=docker-bench.log

wfaler

sudo apt-get install bind9 bind9utils bind9-doc
wget https://dl.bintray.com/mitchellh/consul/0.5.2_linux_amd64.zip

/etc/bind/named.conf.options:
options {
        directory "/var/cache/bind";
        recursion yes;
        allow-query { localhost; };

        forwarders {

jboner

Latency Comparison Numbers (~2012)
----------------------------------
L1 cache reference                           0.5 ns
Branch mispredict                            5   ns
L2 cache reference                           7   ns                      14x L1 cache
Mutex lock/unlock                           25   ns
Main memory reference                      100   ns                      20x L2 cache, 200x L1 cache
Compress 1K bytes with Zippy             3,000   ns        3 us
Send 1K bytes over 1 Gbps network       10,000   ns       10 us
Read 4K randomly from SSD*             150,000   ns      150 us          ~1GB/sec SSD