Aruna Tennakoon kakopappa

Collection of sysctl networking notes

List & reloading changes
Summary details of each connection status
Settings tweaking in /etc/sysctl.conf
- Detailed setting notes
- Control TIME_WAIT and connection tracking timeouts
Miscellaneous
- Nginx Plus additions
Further reading

Moved to git repository: https://github.com/denji/nginx-tuning

NGINX Tuning For Best Performance

For this configuration you can use web server you like, i decided, because i work mostly with it to use nginx.

Generally, properly configured nginx can handle up to 400K to 500K requests per second (clustered), most what i saw is 50K to 80K (non-clustered) requests per second and 30% CPU load, course, this was 2 x Intel Xeon with HyperThreading enabled, but it can work without problem on slower machines.

You must understand that this config is used in testing environment and not in production so you will need to find a way to implement most of those features best possible for your servers.

Virtual Hosts on nginx (CSC309)

When hosting our web applications, we often have one public IP address (i.e., an IP address visible to the outside world) using which we want to host multiple web apps. For example, one may wants to host three different web apps respectively for example1.com, example2.com, and example1.com/images on the same machine using a single IP address.

How can we do that? Well, the good news is Internet browsers

iOS Over the Air App Distribution

Export your app using Xcode's Organizer, be sure and choose Save for Ad Hoc Deployment
Create a folder on Dropbox and add your app's .ipa file
Add app.plist to your folder with the following contents:

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">

View Click

Instead of the verbose setOnClickListener:

RxView.clicks(submitButton).subscribe(o -> log("submit button clicked!"));

Filter even numbers

Observable
    .just(1, 2, 3, 4, 5, 6, 7, 8, 9, 10)

	var socket = null;

	function bootstrap() {

	// 適当な図形を描画
	var c = document.getElementById('mycanvas');
	var ctx = c.getContext('2d');
	ctx.globalalpha = 0.3;
	for(var i=0; i<1000; i++) {
	ctx.beginPath();

	1. Install Linux updates, set time zones, followed by GCC and Make

	sudo yum -y update
	sudo ln -sf /usr/share/zoneinfo/America/Indianapolis \
	/etc/localtime
	sudo yum -y install gcc make


	2. Download, Untar and Make Redis 2.8 (check here http://redis.io/download)

	/*
	* SmartThings Clapper
	* Author: Gilbert Chan
	* Update: 10/18/14
	* Contributors: Manoj Kunthu, Andrew Mager
	*/

	#include <SoftwareSerial.h>
	#include <SmartThings.h>

	import android.os.Bundle;
	import android.support.design.widget.AppBarLayout;
	import android.support.design.widget.TabLayout;
	import android.support.v4.widget.SwipeRefreshLayout;
	import android.support.v7.app.AppCompatActivity;
	import android.support.v7.widget.GridLayoutManager;
	import android.support.v7.widget.RecyclerView;
	import android.util.Log;

	import com.blackcj.designsupportexample.adapters.RecyclerViewAdapter;

	#include <ESP8266WiFi.h>
	#include <WiFiUdp.h>

	void setup() {
	int cnt = 0;

	// set for STA mode
	WiFi.mode(WIFI_STA);

	// put your setup code here, to run once: