hellerbarde

Latency numbers every programmer should know

L1 cache reference ......................... 0.5 ns
Branch mispredict ............................ 5 ns
L2 cache reference ........................... 7 ns
Mutex lock/unlock ........................... 25 ns
Main memory reference ...................... 100 ns             
Compress 1K bytes with Zippy ............. 3,000 ns  =   3 µs
Send 2K bytes over 1 Gbps network ....... 20,000 ns  =  20 µs
SSD random read ........................ 150,000 ns  = 150 µs

Read 1 MB sequentially from memory ..... 250,000 ns = 250 µs

larrybolt

#!/usr/bin/env bash
set -o errexit
set -o nounset
set -o pipefail

# Automatically update your CloudFlare DNS record to the IP, Dynamic DNS
# Can retrieve cloudflare Domain id and list zone's, because, lazy

# Place at:
# /usr/local/bin/cf-ddns.sh

mikeyk

#! /usr/bin/env python

import redis
import random
import pylibmc
import sys

r = redis.Redis(host = 'localhost', port = 6389)
mc = pylibmc.Client(['localhost:11222'])

fiorix

// Simple groupcache example: https://github.com/golang/groupcache
// Running 3 instances:
// go run groupcache.go -addr=:8080 -pool=http://127.0.0.1:8080,http://127.0.0.1:8081,http://127.0.0.1:8082
// go run groupcache.go -addr=:8081 -pool=http://127.0.0.1:8081,http://127.0.0.1:8080,http://127.0.0.1:8082
// go run groupcache.go -addr=:8082 -pool=http://127.0.0.1:8082,http://127.0.0.1:8080,http://127.0.0.1:8081
// Testing:
// curl localhost:8080/color?name=red
package main

import (

ebidel

<?php
$fileName = $_FILES['afile']['name'];
$fileType = $_FILES['afile']['type'];
$fileContent = file_get_contents($_FILES['afile']['tmp_name']);
$dataUrl = 'data:' . $fileType . ';base64,' . base64_encode($fileContent);

$json = json_encode(array(
  'name' => $fileName,
  'type' => $fileType,
  'dataUrl' => $dataUrl,

nictuku

package main

import (
	"fmt"
	"io"
	"io/ioutil"
	"log"

	"code.google.com/p/go.crypto/ssh"
	"code.google.com/p/go.crypto/ssh/terminal"

jambu

/* Gmail style scrollbar */
::-webkit-scrollbar {
    width: 12px
}
::-webkit-scrollbar-thumb {
    border-width: 1px 1px 1px 2px
}
::-webkit-scrollbar-track {
    border-width: 0
}

kofemann

#
# Enable CEPH repos as described at http://ceph.com/docs/master/install/get-packages/#rpm
# Install ceph-deploy package
#

export DATA_DEV=sdb
export JRNL_DEV=sdc
export FS_TYPE=xfs
export CEPH_S_NODE=ceph-s
export CEPH_RELEASE=giant

calmh

Goals

Syncthing devices that store data in encrypted format. Such a device can participate fully in a cluster, but the information on the device is not directly usable.

Assumptions and Definitions

• There exists a secret key per folder, known only by devices that can access the unencrypted data. We call these "secure devices".

• Devices that do not know the secret key can only access encrypted data. We call these "insecure devices".

kemo

<?php defined('SYSPATH') or die('No direct script access.');
/**
 * Extend this class if you want your model cached. Example usage:
 * 
 * 1. Model
 *    class Model_User extends ORM_Cached {}
 * 
 * 2. Usage
 *