justlaputa

const express = require('express')
const app = express()

app.use(function middlewareWithoutPath(req, res, next) {
    console.log('use middleware without path')
    next()
})

app.use('/foo', function middlewareWithPath(req, res, next) {
    console.log('use middleware with path')

justlaputa

#!/bin/env python
import os
import json
import hashlib
from functools import reduce
import argparse
import logging
import shutil

DOCKER_DIR = '/var/lib/docker'

justlaputa

$ sudo systemctl cat resilio-sync.service
# /lib/systemd/system/resilio-sync.service
[Unit]
Description=Resilio Sync service
Documentation=http://help.getsync.com/
After=network.target network-online.target

[Service]
Type=forking
User=rslsync

justlaputa

$ sudo systemctl edit resilio-sync.service
[Service]
User=laputa
Group=laputa
PIDFile=/home/laputa/.config/resilio-sync/sync.pid
ExecStartPre=
ExecStart=
ExecStart=/usr/bin/rslsync --config /home/laputa/.config/resilio-sync/config.json

justlaputa

$ /etc/resilio-sync/init_user_config.sh
$ cat ~/.config/resilio-sync/config.json
{
    "storage_path" : "/home/laputa/.config/resilio-sync/storage",
    "pid_file" : "/home/laputa/.config/resilio-sync/sync.pid",

    "webui" :
    {
        "listen" : "127.0.0.1:8888"
    }

justlaputa

#!/bin/sh

mkdir -p $HOME/.config/resilio-sync

BTSYNC_STORAGE=$HOME/.config/btsync/storage
RESILIO_STORAGE=$HOME/.config/resilio-sync/storage

CONFIG_PATH=$HOME/.config/resilio-sync/config.json

justlaputa

$ sudo systemctl cat resilio-sync.service
# /lib/systemd/system/resilio-sync.service
[Unit]
Description=Resilio Sync service
Documentation=http://help.getsync.com/
After=network.target network-online.target

[Service]
Type=forking
User=rslsync

justlaputa

laputa@laputa-nuc-ubuntu:~$ ps aux | grep rslsync
rslsync   8388  0.2  0.0 504900 13676 ?        Ssl  23:03   0:01 /usr/bin/rslsync --config /etc/resilio-sync/config.json
laputa    8420  0.0  0.0  15208   928 pts/17   S+   23:10   0:00 grep --color=auto rslsy

justlaputa

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

justlaputa

# Copy from https://github.com/MarvAmBass/docker-nginx-registry-proxy/blob/master/docker-registry.conf
# For versions of Nginx > 1.3.9 that include chunked transfer encoding support
# Replace with appropriate values where necessary

upstream docker-registry {
 server registry:5000;
}

server {
 listen 443 default_server;