BINGGGOOOOOO y0ngb1n

How to increase ulimit in Linux:

Step 1 (ulimit): open the sysctl.conf and add this line fs.file-max = 65536
```
  vi /etc/sysctl.conf   
```
add following at end of file in above file:
```
  fs.file-max = 65536
```

save and exit.

Image source

https://gyazo.com/eb5c5741b6a9a16c692170a41a49c858.png

Try resize it!

![](https://gyazo.com/eb5c5741b6a9a16c692170a41a49c858.png | width=100)

System Design Cheatsheet

Picking the right architecture = Picking the right battles + Managing trade-offs

Basic Steps

Clarify and agree on the scope of the system

User cases (description of sequences of events that, taken together, lead to a system doing something useful)
- Who is going to use it?
- How are they going to use it?

ELK (Elasticsearch Logstash Kibana)

Though we're focused more on server setup procedure in this document, I will still give a very brief explanation in laymen terms for ELK. To those who are starting new in this stack, must have already heard of MVC (Model View Controller), so take it like this:

Model => Elasticsearch (for Storage, Indexing & Search)
View => Kibana (for DataViz & G-Man, yeah the one in half life 😏)
Controller => Logstash (For Logs & Filtering)

	原帖地址: http://topic.csdn.net/u/20110113/19/b0d5d506-4307-428b-a61d-7974aa66a2da.html

	首先要说明的是：这里介绍的方法都是大部分是本人“悟”出来的，所以网上难有流传！
	好方法不能自己私藏，否则就白忙乎这几天了，分享给有需要的朋友们。如果有转载，敬请注明来自CSDN老邓作品。
	呵呵，给自己打广告，实在是无耻之极，权当无聊之时打字之用。
	欢迎流传，为最优秀的分布式版本管理系统Git做宣传！！

	步骤：
	1. 下载：http://loaden.googlecode.com/files/gitconfig.7z
	2. 解压到：<MsysGit安装目录>/cmd/，例如：D:\Program Files\Git\cmd

	# %W% %E%
	#
	# Copyright (c) 2009, 2011, Oracle and/or its affiliates. All rights reserved.
	#

	# Version

	version=1

	# Component Font Mappings

	#
	# Add Google Analytics tracking code to HTML response
	#
	# Usage:
	# set $tracking_id 'UA-12345678-9';
	# include incl/analytics.conf;
	#
	# It needs nginx compiled with option --with-http_sub_module.
	# Uses optimized GA code from: http://mathiasbynens.be/notes/async-analytics-snippet
	#

	#!/bin/sh

	git filter-branch --env-filter '

	OLD_EMAIL="your-old-email@example.com"
	CORRECT_NAME="Your Correct Name"
	CORRECT_EMAIL="your-correct-email@example.com"

	if [ "$GIT_COMMITTER_EMAIL" = "$OLD_EMAIL" ]
	then

	/**
	* Using Apache Common Bean Utils.
	*/
	import org.apache.commons.beanutils.BeanUtils;
	import java.util.HashMap;

	public class ApacheCommonExample throws IllegalAccessException,
	InvocationTargetException, NoSuchMethodException {

	public HashMap<String,Object> convert(Person person) {

	# Credit http://stackoverflow.com/a/2514279
	for branch in `git branch -r \| grep -v HEAD`;do echo -e `git show --format="%ci %cr" $branch \| head -n 1` \\t$branch; done \| sort -r