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@yorickdowne
yorickdowne / HallOfBlame.md
Last active May 9, 2024 08:32
Great and less great SSDs for Ethereum nodes

Overview

Syncing an Ethereum node is largely reliant on IOPS, I/O Per Second. Budget SSDs will struggle to an extent, and some won't be able to sync at all.

This document aims to snapshot some known good and known bad models.

For size, 4TB comes recommended as of mid 2024. The smaller 2TB drive should last an Ethereum full node until early 2025 or thereabouts, with crystal ball uncertainty. Remy wrote a migration guide to 4TB.

High-level, QLC and DRAMless are far slower than "mainstream" SSDs. QLC has lower endurance as well. Any savings will be gone when the drive fails early and needs to be replaced.

@ciotlosm
ciotlosm / Lovelace.md
Last active June 24, 2021 20:16
Lovelace
@synic
synic / airwatchlookup.txt
Created June 1, 2018 19:20
AirWatch lookup variables in AppConfig
{Date} Today's Date
{ApplicationName} Friendly name of application
{ApplicationDescription} Application's description
{ApplicationComments} Comments associated with the application
{ApplicationImage} Image of the application's icon
{AppCatalogPageReferenceURL} Link to the AirWatch App Catalog page referencing the application
{EnrollmentSupportEmail} Contact email address for support
{EnrollmentSupportPhone} Contact phone number for support
{FirstName} User's first name
{LastName} User's last name
@myshov
myshov / function_invocation.js
Last active January 21, 2024 15:14
11 Ways to Invoke a Function
console.log(1);
(_ => console.log(2))();
eval('console.log(3);');
console.log.call(null, 4);
console.log.apply(null, [5]);
new Function('console.log(6)')();
Reflect.apply(console.log, null, [7])
Reflect.construct(function(){console.log(8)}, []);
Function.prototype.apply.call(console.log, null, [9]);
Function.prototype.call.call(console.log, null, 10);
@spaze
spaze / opera-vpn.md
Last active April 20, 2024 02:14
Opera VPN behind the curtains is just a proxy, here's how it works

2023 update

ℹ️ Please note this research is from 2016 when Opera has first added their browser "VPN", even before the "Chinese deal" was closed. They have since introduced some real VPN apps but this below is not about them.

🕵️ Some folks also like to use this article to show a proof that the Opera browser is a spyware or that Opera sells all your data to 3rd parties or something like that. This article here doesn't say anything like that.


When setting up (that's immediately when user enables it in settings) Opera VPN sends few API requests to https://api.surfeasy.com to obtain credentials and proxy IPs, see below, also see The Oprah Proxy.

The browser then talks to a proxy de0.opera-proxy.net (when VPN location is set to Germany), it's IP address can only be resolved from within Opera when VPN is on, it's 185.108.219.42 (or similar, see below). It's an HTTP/S proxy which requires auth.

---
--- Created Created by Swav Swiac on 23/07/2015.
---
--- Allows to run Redis Lua script in a debuggable environment resembling one provided by Redis
---
--- Usage:
---
--- local runner = require 'redis_runner'.connect(host, port)
---
--- local KEYS = {}
@maximilianschmitt
maximilianschmitt / readme.md
Last active August 29, 2015 14:19
Compiling your ES6 command line apps to work with node.js
@rvagg
rvagg / install-node.sh
Last active April 2, 2024 16:51
install-node.sh - simple script to fetch and install Node.js releases and nightlies on Linux (x86, x64 & ARM) and OS X
#!/bin/bash
# Note your /usr/local will need to be writable by the user running it,
# alternatively run it with `sudo`
hasxz=$(which xzcat)
os=$(uname | tr '[A-Z]' '[a-z]')
arch=$(uname -m)
targetdir="/usr/local/"
domain=nodejs.org

2015-01-29 Unofficial Relay FAQ

Compilation of questions and answers about Relay from React.js Conf.

Disclaimer: I work on Relay at Facebook. Relay is a complex system on which we're iterating aggressively. I'll do my best here to provide accurate, useful answers, but the details are subject to change. I may also be wrong. Feedback and additional questions are welcome.

What is Relay?

Relay is a new framework from Facebook that provides data-fetching functionality for React applications. It was announced at React.js Conf (January 2015).