amgorb

If you redis initial replication fails with error like 
"5101:M 20 Feb 18:14:29.130 # Client id=4500196 addr=71.459.815.760:43872 fd=533 name= age=127 idle=127 flags=S db=0 sub=0 psub=0 multi=-1 qbuf=0 qbuf-free=0 obl=13997 oll=1227 omem=192281275 events=rw cmd=psync scheduled to be closed ASAP for overcoming of output buffer limits.

means that slave buffer is not enough and you should increase it (at master!) with command like
redis-cli config set client-output-buffer-limit "slave 836870912 836870912 0"

more info: https://redis.io/topics/clients

dmpanch

All actions are performed in Terminal.app.

1. Install Homebrew http://brew.sh/

2. Install Jack (route audio tool) http://jackaudio.org/. Current stable version from official website doesn't work with
MacOS Sierra (I use 10.12.3) so you need to download beta version from there https://yadi.sk/d/JwT10b7v3Dm5yy.
After installing reboot your computer.

3. Install Darkice (audio streamer) via brew.

meanevo

# Make sure you have these installed
yum install -y make gcc perl pcre-devel zlib-devel
# Download/Extract source
wget -O /tmp/haproxy.tgz http://www.haproxy.org/download/1.7/src/haproxy-1.7.2.tar.gz
tar -zxvf /tmp/haproxy.tgz -C /tmp
cd /tmp/haproxy-*
# Compile HAProxy
# https://github.com/haproxy/haproxy/blob/master/README
make \
    TARGET=linux2628 USE_LINUX_TPROXY=1 USE_ZLIB=1 USE_REGPARM=1 USE_PCRE=1 USE_PCRE_JIT=1 \

nathwill

vrrp_script chk_redis_master {
  script "redis-cli info replication | grep -q 'role:master'"
  interval 2
  weight 2
  rise 2
  fall 2
}

vrrp_instance redis_vip {
  interface eth0

sphvn

var traverse = function(o, fn) {
  for (var i in o) {
    fn.apply(this,[i,o[i]]);  
    if (o[i] !== null && typeof(o[i])=="object") {
      traverse(o[i], fn);
    }
  }
}

// usage

vitorbritto

Remove MySQL completely

1. Open the Terminal

2. Use mysqldump to backup your databases

3. Check for MySQL processes with: ps -ax | grep mysql

4. Stop and kill any MySQL processes

5. Analyze MySQL on HomeBrew:

   brew remove mysql
   

jdx

// This script will boot app.js with the number of workers
// specified in WORKER_COUNT.
//
// The master will respond to SIGHUP, which will trigger
// restarting all the workers and reloading the app.

var cluster = require('cluster');
var workerCount = process.env.WORKER_COUNT || 2;

// Defines what each worker needs to run

mikermcneil

// To disable socket.io, disable the sockets hook (you'll have to disable the pubsub hook as well)
// This is a replacement for the default app.js file:

require('sails').lift({
  hooks: {
    sockets: false,
    pubsub: false
  }

zhouming

<?php  if ( ! defined('BASEPATH')) exit('No direct script access allowed');

class MY_Session extends CI_Session{

	private $sess_use_redis = TRUE;	
	private $redis = '';

	public function __construct($params = array()) {
		//parent::__construct();
		$this->CI =& get_instance();

jboner

Latency Comparison Numbers (~2012)
----------------------------------
L1 cache reference                           0.5 ns
Branch mispredict                            5   ns
L2 cache reference                           7   ns                      14x L1 cache
Mutex lock/unlock                           25   ns
Main memory reference                      100   ns                      20x L2 cache, 200x L1 cache
Compress 1K bytes with Zippy             3,000   ns        3 us
Send 1K bytes over 1 Gbps network       10,000   ns       10 us
Read 4K randomly from SSD*             150,000   ns      150 us          ~1GB/sec SSD