rubio

Keybase proof

I hereby claim:

• I am rubio on github.
• I am rubio (https://keybase.io/rubio) on keybase.
• I have a public key ASCqQf1Ta9Dxym-C2HZIOdFiOBalozxMZd8CBB2ogSD6JQo

To claim this, I am signing this object:

rubio

// Use Gists to store code you would like to remember later on
console.log(window); // log the "window" object to the console

rubio

<?xml version='1.0' encoding='UTF-8'?>
<project>
  <actions/>
  <description></description>
  <logRotator class="hudson.tasks.LogRotator">
    <daysToKeep>90</daysToKeep>
    <numToKeep>30</numToKeep>
    <artifactDaysToKeep>-1</artifactDaysToKeep>
    <artifactNumToKeep>-1</artifactNumToKeep>
  </logRotator>

rubio

<?xml version='1.0' encoding='UTF-8'?>
<project>
  <actions/>
  <description></description>
  <logRotator class="hudson.tasks.LogRotator">
    <daysToKeep>90</daysToKeep>
    <numToKeep>30</numToKeep>
    <artifactDaysToKeep>-1</artifactDaysToKeep>
    <artifactNumToKeep>-1</artifactNumToKeep>
  </logRotator>

rubio

So I heard you hosed your Riak cluster

I don't know what you did (I don't know what I did when this happened to me), but you ended up with a completely borked Riak cluster. Possible causes and symptoms include:

• riak-admin transfers shows different things depending on the node you run it on
• you tried to leave/join nodes to fix things, but it made them only worse
• you ran mixed versions in parallel, instead of doing a clean rolling upgrade
• some data seems to be missing, and when you list the keys in a bucket, clearly there is not the amount you were expecting
• YOU'RE AFRAID YOU MIGHT HAVE LOST DATA

rubio

#! /usr/bin/env python

import time
import redis

cn = redis.Redis(host="10.0.15.1", port=6379)

cnt = 0
with open('3460.lst', 'rb') as f:
    for key in f:

rubio

Channels Are Not Enough

... or Why Pipelining Is Not That Easy

Golang Concurrency Patterns for brave and smart.

By @kachayev

Intro

rubio

#How I built an audio book reader for my nearly blind grandfather

Tweet this - Follow me

Last year, when visiting my family back home in Holland, I also stopped by my grand-parents. My grand-father, now 93 years old, had always been a very active man. However, during the presceding couple of months, he'd gone almost completely blind and now spent his days sitting in a chair. Trying to think of something for him to do, I suggested he try out audio books. After finally convincing him -- he said audio books were for sad old people -- that listening to a well performed recording is actually a wonderful experience, I realized the problem of this idea.

####The problem with audio devices and the newly blind. After my first impulse to jump up and go buy him an iPod Touch, I soon realized that, to use an iPod, or any audio d

rubio

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

rubio

Colors in terminal

It's a common confusion about terminal colors... Actually we have this:

• plain ascii
• ansi escape codes (16 color codes with bold/italic and background)
• 256 color palette (216 colors+16gray + ansi) (colors are 24bit)
• 24bit true color (888 colors (aka 16 milion))

The 256 color palete is configured at start, and it's a 666 cube of colors, each of them defined as a 24bit (888 rgb) color.