JT Lee revirth

Backend Architectures

Twitter

ror, scala, jetty, erlang, thrift, mongrel, comet server, my-sql, memchached, varnish, kestrel(mq), starling, gizzard, cassandra, hadoop, vertica, munin, nagios, awstats

Introduce Gizzard of Twitter - 트위터의 새로운 분산 관리 라이브러리 Gizzard를 소개합니다.
The Architecture Twitter Uses to Deal with 150M Active Users, 300K QPS, a 22 MB/S Firehose, and Send Tweets in Under 5 Seconds
Scaling Twitter: Making Twitter 10000 Percent Faster

Set up cmder to use msysgit / bash by default

Install cmder_mini (msysgit is already installed, so no need for full version)
In Cmder, open settings: Win + Alt + P
Under Startup > Tasks, add a task called {bash} with the following settings:
- Task parameters (set icon):
  - For Cmder icon: /icon "%CMDER_ROOT%\cmder.exe"
  - For Git icon: /icon "C:\Program Files (x86)\Git\etc\git.ico"
- Commands (open Git's bash shell):
"C:\Program Files (x86)\Git\bin\sh.exe" -l -new_console:d:%USERPROFILE%

도커와 AWS를 활용한 클라우드 딥러닝 환경 구축

글쓴이: 김정주([email protected])

최근 딥러닝 관련 패키지들은 대부분 CPU와 GPU를 함께 지원하고 있습니다. GPU를 사용하면 보다 빠르게 학습 결과를 낼 수 있지만, GPU를 활용하기 위해서는 NVIDIA계열의 그래픽 카드, 드라이버 S/W 그리고 CUDA의 설치를 필요로 합니다.

이 글에서는 AWS의 GPU 인스턴스와 도커를 활용해 딥러닝 패키지(Caffe)를 편리하게 사용하는 방법을 소개합니다.

Linux fun-o-matic

How to have some fun using the terminal.

Install cowsay [0] via : sudo apt-get install cowsay
Install fortune [1] via : sudo apt-get install fortune
Install figlet [3] via : sudo apt-get install figlet
Make sure you have Ruby installed via : ruby -v
Install the lolcat [2] via : gem gem install lolcat
(option) Add to .bash_profile and/or .bashrc

Angular Universal (Angular 2 Server Rendering)

AngularU Server Rendering Presentation (6/25/2015): https://www.youtube.com/watch?v=0wvZ7gakqV4
AngularConnect Full Stack Angular 2 Presentation (10/20/2015): https://www.youtube.com/watch?v=MtoHFDfi8FM

문서 정보

GitHub

https://github.com/angular/universal

원문 링크

R to python data wrangling snippets

The dplyr package in R makes data wrangling significantly easier. The beauty of dplyr is that, by design, the options available are limited. Specifically, a set of key verbs form the core of the package. Using these verbs you can solve a wide range of data problems effectively in a shorter timeframe. Whilse transitioning to Python I have greatly missed the ease with which I can think through and solve problems using dplyr in R. The purpose of this document is to demonstrate how to execute the key dplyr verbs when manipulating data using Python (with the pandas package).

dplyr is organised around six key verbs:

	http://docs.opscode.com/chef/install_server.html
	http://www.ducea.com/2013/03/05/howto-migrate-to-chef-11/

	wget https://opscode-omnitruck-release.s3.amazonaws.com/ubuntu/12.04/x86_64/chef-server_11.0.6-1.ubuntu.12.04_amd64.deb
	sudo dpkg -i chef-server*
	sudo chef-server-ctl reconfigure
	sudo chef-server-ctl test

	mkdir -p ~/.chef
	sudo cp /etc/chef-server/chef-webui.pem ~/.chef/

	plot.nnet<-function(mod.in,nid=T,all.out=T,all.in=T,bias=T,wts.only=F,rel.rsc=5,
	circle.cex=5,node.labs=T,var.labs=T,x.lab=NULL,y.lab=NULL,
	line.stag=NULL,struct=NULL,cex.val=1,alpha.val=1,
	circle.col='lightblue',pos.col='black',neg.col='grey',
	bord.col='black', ...){

	require(scales)

	#sanity checks
	if('mlp' %in% class(mod.in)) warning('Bias layer not applicable for rsnns object')

	-- http://blog.jooq.org/2013/11/19/how-to-create-a-range-from-1-to-10-in-sql/

	IF EXISTS (SELECT *
	FROM dbo.sysobjects
	WHERE id = object_id (N'[dbo].[generate_series]')
	AND OBJECTPROPERTY(id, N'IsTableFunction') = 1)
	DROP FUNCTION [dbo].[generate_series]
	GO

	CREATE FUNCTION [dbo].[generate_series] ( @p_start INT, @p_end INT)

	static void drawString(string text, Vector3 worldPos, Color? colour = null) {
	UnityEditor.Handles.BeginGUI();
	if (colour.HasValue) GUI.color = colour.Value;
	var view = UnityEditor.SceneView.currentDrawingSceneView;
	Vector3 screenPos = view.camera.WorldToScreenPoint(worldPos);
	Vector2 size = GUI.skin.label.CalcSize(new GUIContent(text));
	GUI.Label(new Rect(screenPos.x - (size.x / 2), -screenPos.y + view.position.height + 4, size.x, size.y), text);
	UnityEditor.Handles.EndGUI();
	}