George Liu (eva2000) centminmod

There are many ways to parse in variable into the nginx config file. Some uses set_by_lua which is offered by lua-nginx-module. Some use envstubst to populate varilabes into a template file.

Today I am going to show you how to do that with njs the JS scripting engine for nginx.

## /etc/nginx/fetch_env.js
function fetch_upstream_host(r) {
 return process.env.UPSTREAM_HOST;

High Performance Redis

In response to this brief blog entry, @antirez tweeted for some documentation on high-performance techniques for Redis. What I present here are general high-performance computing (HPC) techniques. The examples are oriented to Redis. but they work well for any program designed to be single- or worker-threaded and asynchronous (e.g. uses epoll).

The motivation for using these techniques is to maximize performance of our system and services. By isolating work, controlling memory, and other tuning, you can achieve significant reduction in latency and increase in throughput.

My perspective comes from the microcosm of my own bare-metal (vs VM), on-premises deployment. It might not be suitable for all scenarios, especially cloud deployments, as I have little experience with HPC there. After some discussion, maybe this can be adapted as [redis.io documentation](https://redis.io/do

People

`:bowtie:`	😄 `:smile:`	😆 `:laughing:`
😊 `:blush:`	😃 `:smiley:`	☺️ `:relaxed:`
😏 `:smirk:`	😍 `:heart_eyes:`	😘 `:kissing_heart:`
😚 `:kissing_closed_eyes:`	😳 `:flushed:`	😌 `:relieved:`
😆 `:satisfied:`	😁 `:grin:`	😉 `:wink:`
😜 `:stuck_out_tongue_winking_eye:`	😝 `:stuck_out_tongue_closed_eyes:`	😀 `:grinning:`
😗 `:kissing:`	😙 `:kissing_smiling_eyes:`	😛 `:stuck_out_tongue:`

Redis KPTI benchmark

Other benchmarks make me sad. People run them in the cloud where VMs can migrate between different hosts on reboots and use old kernels. Here we use bare metal with the same recent kernel to remove extra variables and measure KPTI impact and KPTI impact only.

Setup

Kernel: 4.14.11

	I have done some preliminary research into this bug and so far it does not seem like a backdoor. Just some really weird logic when handling routes, and rendering templates.

	As to why widgetConfig[code] executes via a POST request, it is because of the following code located in /includes/vb5/frontend/applicationlight.php


	$serverData = array_merge($_GET, $_POST);

	if (!empty($this->application['handler']) AND method_exists($this, $this->application['handler']))
	{
	$app = $this->application['handler'];

	#!/bin/bash

	# Install Nano Editor (with syntax highlighting) on MacOS without using Homebrew
	# You can get the latest version number from https://www.nano-editor.org

	# Instructions:
	# - First off, download this Bash script from the browser & make it executable:
	# $ chmod +x install_nano_on_macos_without_homebrew.sh
	# - If you have "wget" installed (you most likely do), just run the script with:
	# $ ./install_nano_on_macos_without_homebrew.sh

	#!/bin/bash
	# Copyright 2013-2019 Neomantra BV. All rights reserved.
	# Released under the MIT License.

	usage()
	{
	cat >&2 <<EOF
	usage: $0 [-h] [-v] [-c cpulist] ppid1 [ppid2 [...]]

	Given a list of parent process IDs, this script finds their child

	<?php
	/**
	* Plugin name: HTTP2 Push scripts
	* Author: Tom J Nowell
	*/

	function tomjn_get_dep_url( /\WP_Dependency/ $dep ) {
	global $wp_version;
	$relative = str_replace( site_url(), '', $dep->src );
	$ver = $dep->ver;

	(function (context, trackingId, options) {
	const history = context.history;
	const doc = document;
	const nav = navigator \|\| {};
	const storage = localStorage;
	const encode = encodeURIComponent;
	const pushState = history.pushState;
	const typeException = 'exception';
	const generateId = () => Math.random().toString(36);
	const getId = () => {

	var VERSION = 'v1';

	var cacheFirstFiles = [
	// ADDME: Add paths and URLs to pull from cache first if it has been loaded before. Else fetch from network.
	// If loading from cache, fetch from network in the background to update the resource. Examples:
	// 'assets/img/logo.png',
	// 'assets/models/controller.gltf',

	];