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@jnatkins
jnatkins / pom.xml
Created August 29, 2012 18:56
A sample POM for setting up a basic Maven project for CDH application development
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<!-- Replace the group ID with your group ID -->
<groupId>com.mycompany.hadoopproject</groupId>
<!-- Replace the artifact ID with the name of your project -->
<artifactId>my-hadoop-project</artifactId>
<version>1.0-SNAPSHOT</version>
<packaging>jar</packaging>
@phred
phred / pedantically_commented_playbook.yml
Last active February 7, 2026 19:32
Very complete Ansible playbook, showing off all the options
---
####
#### THIS IS OLD AND OUTDATED
#### LIKE, ANSIBLE 1.0 OLD.
####
#### PROBABLY HIT UP https://docs.ansible.com MY DUDES
####
#### IF IT BREAKS I'M JUST SOME GUY WITH
#### A DOG, OK, SORRY
####
@jboner
jboner / latency.txt
Last active September 14, 2026 16:40
Latency Numbers Every Programmer Should Know
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