JoshuaChi

import java.util.Collection;  
import java.util.SortedMap;  
import java.util.TreeMap;  
 
public class ConsistentHash<T> {  
 
 private final HashFunction hashFunction;  
 private final int numberOfReplicas;  
 private final SortedMap<Integer, T> circle = new TreeMap<Integer, T>();  
 

JoshuaChi

From: https://raw.github.com/gist/933cc4f7df97d553ed89/24386c6a79bb4b31fb818b70b34c5eab7f12e1ff/gistfile1.txt

Stevey's Google Platforms Rant

I was at Amazon for about six and a half years, and now I've been at Google for that long. One thing that struck me immediately about the two companies -- an impression that has been reinforced almost daily -- is that Amazon does everything wrong, and Google does everything right. Sure, it's a sweeping generalization, but a surprisingly accurate one. It's pretty crazy. There are probably a hundred or even two hundred different ways you can compare the two companies, and Google is superior in all but three of them, if I recall correctly. I actually did a spreadsheet at one point but Legal wouldn't let me show it to anyone, even though recruiting loved it.

I mean, just to give you a very brief taste: Amazon's recruiting process is fundamentally flawed by having teams hire for themselves, so their hiring bar is incredibly inconsistent across teams, despite various effort

JoshuaChi

server {
	index index.php;
	set $basepath "/var/www";

	set $domain $host;

	# check one name domain for simple application
	if ($domain ~ "^(.[^.]*)\.dev$") {
		set $domain $1;
		set $rootpath "${domain}";

JoshuaChi

What is your folder-structure preference for a large-scale Node.js project?

0: Starting from Rails

This is the reference point. All the other options are based off this.

|-- app
|   |-- controllers
|   |   |-- admin

JoshuaChi

Steps to install PIL

$ sudo apt-get install python-imaging
$ sudo apt-get install libjpeg-dev libfreetype6 libfreetype6-dev zlib1g-dev

$ sudo ln -s /usr/lib/`uname -i`-linux-gnu/libfreetype.so /usr/lib/
$ sudo ln -s /usr/lib/`uname -i`-linux-gnu/libjpeg.so /usr/lib/
$ sudo ln -s /usr/lib/`uname -i`-linux-gnu/libz.so /usr/lib/

$ pip install PIL

JoshuaChi

%% Description: A simple FSM for a code lock with three states
%% based on an example from the OTP system documentation
-module(code_lock_fsm).
-behaviour(gen_fsm).

%% public API functions
-export([start_link/1, stop/0, button/1, reset/0, get_state/0]).

%% state names
-export([locked/2, locked/3, open/2, open/3]).

JoshuaChi

# set up flags for Numpy C extentions compiling
export CFLAGS="-arch i386 -arch x86_64"
export FFLAGS="-m32 -m64"
export LDFLAGS="-Wall -undefined dynamic_lookup -bundle -arch i386 -arch x86_64"
export CC=gcc-4.2
export CXX="g++ -arch i386 -arch x86_64"

pip install numpy
# success!

JoshuaChi

#!/bin/sh
#
# Usage: ./redis-delkeys.sh [-h host] [-p port] [-n db] pattern
#
# Matches keys with the KEYS command matching pattern
#   and deletes them from the specified Redis DB.

set -e

HOST="localhost"

JoshuaChi

If you want, I can try and help with pointers as to how to improve the indexing speed you get. Its quite easy to really increase it by using some simple guidelines, for example:

- Use create in the index API (assuming you can).
- Relax the real time aspect from 1 second to something a bit higher (index.engine.robin.refresh_interval).
- Increase the indexing buffer size (indices.memory.index_buffer_size), it defaults to the value 10% which is 10% of the heap.
- Increase the number of dirty operations that trigger automatic flush (so the translog won't get really big, even though its FS based) by setting index.translog.flush_threshold (defaults to 5000).
- Increase the memory allocated to elasticsearch node. By default its 1g.
- Start with a lower replica count (even 0), and then once the bulk loading is done, increate it to the value you want it to be using the update_settings API. This will improve things as possibly less shards will be allocated to each machine.
- Increase the number of machines you have so

JoshuaChi

curl -XDELETE http://localhost:9200/ac-test
curl -XPUT http://localhost:9200/ac-test
curl -XPUT http://localhost:9200/ac-test/people/1 -d '
{
  "firstNames" : "James Earl",
  "lastName" : "Jones",
  "location" : "Hollywood, CA"
}'

curl -XPUT http://localhost:9200/ac-test/people/2 -d '