lbydev

Local SSL websites on macOS Sierra

These instructions will guide you through the process of setting up local, trusted websites on your own computer.

These instructions are intended to be used on macOS Sierra, but they have been known to work in El Capitan, Yosemite, Mavericks, and Mountain Lion.

NOTE: You may substitute the edit command for nano, vim, or whatever the editor of your choice is. Personally, I forward the edit command to Sublime Text:

alias edit="/Applications/Sublime\ Text.app/Contents/SharedSupport/bin/subl"

1. Nginx

$ wrk -t12 -c400 -d2s http://127.0.0.1:8080
Running 2s test @ http://127.0.0.1:8080
  12 threads and 400 connections
  Thread Stats   Avg      Stdev     Max   +/- Stdev
    Latency     7.71ms    3.16ms  23.05ms   69.17%
    Req/Sec     3.44k     1.98k    7.80k    58.22%
  63697 requests in 2.00s, 17.86MB read

linux查看httpd进程数

ps -ef | grep httpd | wc -l

查看Apache的并发请求数及其TCP连接状态

netstat -n | awk '/^tcp/ {++S[$NF]} END {for(a in S) print a, S[a]}'

ANNOUNCEMENT

I have moved this over to the Tech Interview Cheat Sheet Repo and has been expanded and even has code challenges you can run and practice against!

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Magento Scaling Hypotheses

Magento’s checkout throughput can increase to at least 8 times its current capacity and up to 26 times more in ideal conditions.

The current checkouts per hour limit for large, real-world Magento stores is 4,500
This limit cannot effectively be increased with more and/or better hardware
The improper type handling in Magento’s SQL code is the cause of the current limit
If one SQL query is fixed, large Magento stores can scale to a new, real-world limit of 120,000 checkouts per hour
For commodity hardware, this new limit might be 36,000 checkouts per hour

	<?php
	/**
	* Magento
	*
	* NOTICE OF LICENSE
	*
	* This source file is subject to the Open Software License (OSL 3.0)
	* that is bundled with this package in the file LICENSE.txt.
	* It is also available through the world-wide-web at this URL:
	* http://opensource.org/licenses/osl-3.0.php

	第一步，在/etc/yum.repos.d/目录下创建一个源配置文件nginx.repo：

	cd /etc/yum.repos.d/

	vim nginx.repo

	填写如下内容：

	[nginx]
	name=nginx repo

	From 473846959772d8160b34b92ae3bcecddf24b972f Mon Sep 17 00:00:00 2001
	From: =?UTF-8?q?Julian=20Nu=C3=9F?= <[email protected]>
	Date: Tue, 23 Sep 2014 21:07:29 +0200
	Subject: [PATCH 1/1] [BUGIFX] Zend Framework 1 + PHP5.6

	---
	lib/Zend/Locale/Format.php \| 22 +++++++++++-----------
	lib/Zend/Service/Audioscrobbler.php \| 6 +++---
	lib/Zend/Service/Technorati.php \| 6 +++---
	lib/Zend/Validate/Hostname.php \| 4 ++--

	<?php
	// More details here:
	// https://vyspiansky.github.io/2017/11/09/remote-file-exists-using-get-headers/

	$file_headers = @get_headers($url);

	if ($file_headers[0] == 'HTTP/1.0 404 Not Found'){ // or "HTTP/1.1 404 Not Found" etc.
	$file_exists = false;
	} else {
	$file_exists = true;

	# ---------------------------------------------------------------------------
	#
	# Description: This file holds all my BASH configurations and aliases
	#
	# Sections:
	# 1. Environment Configuration
	# 2. Make Terminal Better (remapping defaults and adding functionality)
	# 3. File and Folder Management
	# 4. Searching
	# 5. Process Management