slatemine

h2oai / latency.txt

Created June 5, 2012 01:02 — forked from jboner/latency.txt

Latency numbers every programmer should know

	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
	Send 1K bytes over 1 Gbps network 10,000 ns 0.01 ms
	Read 4K randomly from SSD 150,000 ns 0.15 ms
	Read 1 MB sequentially from memory 250,000 ns 0.25 ms
	Round trip within same datacenter 500,000 ns 0.5 ms

slojo404 / index.html

Created April 18, 2012 20:20 — forked from bunkat/index.html

Timeline using d3.js

	<!DOCTYPE html>
	<html>
	<head>
	<meta http-equiv="Content-Type" content="text/html;charset=utf-8">
	<title>Chronological Diagram of Asia</title>
	<script type="text/javascript" src="http://mbostock.github.com/d3/d3.v2.js"></script>
	<style type="text/css">
	.chart {
	shape-rendering: crispEdges;
	}

medined / accumulo_notes

Created December 29, 2011 19:04

Accumulo Installation and Configuration Steps on a Ubuntu VirtualBox Instance

	Oct 17, 2012 - See https://github.com/medined/accumulo_stackscript for an even better script. Really ignore the stuff below. Go. Scoot.

	Aug 28, 2012 - See http://affy.blogspot.com/2012/08/stackscript-for-accumulo-on-linode.html for a more concise method is configuring accumulo. I'll leave this gist unchanged for fans of history.

	My goal was to get Accumulo running on a VirtualBox Ubuntu instance. I was successful using the following steps. If a line starts with $ then it is a command-line to execute. Note that you'll need to have sudo privilege. My username was 'ubuntu'. If you are using a different username, you'll need to change the process a little bit. I'll try to point out where.

	https://issues.apache.org/jira/browse/ACCUMULO

	##########
	# Start a new VirtualBox instance using the Ubuntu 11.10