charlesroper

How to setup a practically free CDN using Backblaze B2 and Cloudflare

⚠️ Note 2023-01-21
Some things have changed since I originally wrote this in 2016. I have updated a few minor details, and the advice is still broadly the same, but there are some new Cloudflare features you can (and should) take advantage of. In particular, pay attention to Trevor Stevens' comment here from 22 January 2022, and Matt Stenson's useful caching advice. In addition, Backblaze, with whom Cloudflare are a Bandwidth Alliance partner, have published their own guide detailing how to use Cloudflare's Web Workers to cache content from B2 private buckets. That is worth reading,

simonw

How to use Amazon AWS Elasticsearch

The good news: you can get it running on the free tier (with a tiny instance).

The bad news: it's stuck on Elasticsearch 1.5.2 and dynamic scripting (Groovy) is disabled.

http://docs.aws.amazon.com/elasticsearch-service/latest/developerguide/aes-limits.html

Authentication: the safest option is to create a brand new IAM user (using the tool at https://console.aws.amazon.com/iam/home?region=us-east-1 ) with its own access key and secret key. Then when you create the Elasticsearch instance you can paste in the following IAM string:

kageurufu

from flask import Flask
from flask.ext.sqlalchemy import SQLAlchemy
from flask.ext.wtf import Form
from flask.ext.babel import gettext
from wtforms import SelectField, TelField, TextField, FormField, Fieldlist, SubmitField
from wtforms.validators import Optional, Required

app = Flask(__name__)
db = SQLAlchemy(app)

spjwebster

#!/usr/bin/env python

import os, sys
sys.path.append(os.getcwd())

import logging
import rq

MAX_FAILURES = 3

MohamedAlaa

tmux shortcuts & cheatsheet

start new:

tmux

start new with session name:

tmux new -s myname

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

p01

            DO WHAT THE FUCK YOU WANT TO PUBLIC LICENSE
                    Version 2, December 2004

 Copyright (C) 2011 Mathieu 'p01' Henri - http://www.p01.org/releases/

 Everyone is permitted to copy and distribute verbatim or modified
 copies of this license document, and changing it is allowed as long
 as the name is changed.

            DO WHAT THE FUCK YOU WANT TO PUBLIC LICENSE