jordwalke

#!/bin/bash

# Invoke like this:
# ./watch.sh my command here
# And it will run 'my command here' once, and then when it detects changes.

# TODO: Don't just search in the last second. Search for updates since the last
# completed build. Otherwise for big directories, midway through your search
# you've already taken 1s and you will miss updates.

acolyer

A collection of The Morning Paper posts relating to containers, operating systems etc.

In order of first appearance in The Morning Paper.

• On the duality of operating system structures
• Why threads are a bad idea
• Why events are a bad idea
• Unikernels: library operating systems for the cloud
• The scalable commutativity rule: designing scalable software for multicore processors
• Jitsu: just-in time summoning of unikernels

jordwalke

# https://stackoverflow.com/a/28938235
fnd () {
  UNDER_ON=`tput smul`
  UNDER_OFF=`tput rmul`
  BOLD=`tput bold`    # Select bold mode
  BLACK=`tput setaf 0`
  RED=`tput setaf 1`
  GREEN=`tput setaf 2`
  YELLOW=`tput setaf 3`
  BLUE=`tput setaf 4`

spara

Installing Docker CE Edge for Ubuntu Linux

Remove previous versions of Docker and Compose

sudo apt-get purge docker-compose
sudo apt-get purge docker-ce

Install dependencies

jeffgreenca

Install TensorFlow (CPU), Keras, and some other tools to a new anaconda environment.

Open Anaconda Prompt

conda create --name tensorflow35 python=3.5
conda activate tensorflow35
conda install jupyter
conda install scipy
conda install spyder
pip install tensorflow 

etuttle

upstream docker-mirror-upstream {
    server upstream.example.com;
}

proxy_cache_path /var/lib/docker-mirror/cache levels=1:2 max_size=10g inactive=48h keys_zone=cache:10m;

server {
    listen 80 default_server;
    listen 443 ssl default_server;

come-maiz

Smoke tests for the MySQL snap

(based on https://dev.mysql.com/doc/refman/8.0/en/ )

First, install the snap:

$ sudo snap install mysql --channel=8.0/beta

Print the help:

$ mysql.help

kaidul

Latency Comparison Numbers
--------------------------
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

acdlite

// getComponent is a function that returns a promise for a component
// It will not be called until the first mount
function asyncComponent(getComponent) {
  return class AsyncComponent extends React.Component {
    static Component = null;
    state = { Component: AsyncComponent.Component };

    componentWillMount() {
      if (!this.state.Component) {
        getComponent().then(Component => {

vasanthk

System Design Cheatsheet

Picking the right architecture = Picking the right battles + Managing trade-offs

Basic Steps

1. Clarify and agree on the scope of the system

• User cases (description of sequences of events that, taken together, lead to a system doing something useful)
  • Who is going to use it?
  • How are they going to use it?