larsmans

% Copyright (c) 2010-2014, Lars Buitinck
% May be used, redistributed and modified under the terms of the
% GNU Lesser General Public License (LGPL), version 2.1 or later

% Heaps/priority queues in Erlang

% Heaps are data structures that return the entries inserted into them in
% sorted order. This makes them the data structure of choice for implementing
% priority queues, a central element of algorithms such as best-first/A*
% search and Kruskal's minimum-spanning-tree algorithm. 

marktheunissen

This playbook has been removed as it is now very outdated.

KartikTalwar

The fastest remote directory rsync over ssh archival I can muster (40MB/s over 1gb NICs)

This creates an archive that does the following:

rsync (Everyone seems to like -z, but it is much slower for me)

• a: archive mode - rescursive, preserves owner, preserves permissions, preserves modification times, preserves group, copies symlinks as symlinks, preserves device files.
• H: preserves hard-links
• A: preserves ACLs

justinvw

# Delete the possibly existing autocomplete test index
curl -X DELETE localhost:9200/autocomplete_test

# Put the config of the autocomplete index
curl -X PUT localhost:9200/autocomplete_test -d '
{
  "settings" : {
    "index" : {
      "analysis" : {
        "analyzer" : {

jikamens

import binascii
from Crypto.Cipher import AES
from Crypto.Random.random import getrandbits
from hashlib import md5
from schematics.types import StringType
import struct


class DecryptionException(Exception):
    pass

hofmannsven

MySQL

Getting started

• http://www.sqlteaching.com/
• https://www.codecademy.com/learn/learn-sql
• https://www.codecademy.com/catalog/language/sql

Related tutorials

• MySQL-CLI
• Analyzing Business Metrics

jmatthias

import psycopg2.extras
import sqlalchemy.dialects.postgresql
from sqlalchemy.types import TypeEngine
from sqlalchemy.types import String
from sqlalchemy.types import TypeDecorator
import uuid

# Required for PostgreSQL to accept UUID type.
psycopg2.extras.register_uuid()

acolyer

Internet Scale Services Checklist

A checklist for designing and developing internet scale services, inspired by James Hamilton's 2007 paper "On Desgining and Deploying Internet-Scale Services."

• http://mvdirona.com/jrh/talksandpapers/jamesrh_lisa.pdf

Basic tenets

• Does the design expect failures to happen regularly and handle them gracefully?
• Have we kept things as simple as possible?

hmartiro

ZeroMQ vs Redis

This document is research for the selection of a communication platform for robot-net.

Goal

The purpose of this component is to enable rapid, reliable, and elegant communication between the various nodes of the network, including controllers, sensors, and actuators (robot drivers). It will act as the core of robot-net to create a standardized infrastructure for robot control.

Requirements:

popravich

The standard names for indexes in PostgreSQL are:

{tablename}_{columnname(s)}_{suffix}

where the suffix is one of the following:

• pkey for a Primary Key constraint;
• key for a Unique constraint;
• excl for an Exclusion constraint;
• idx for any other kind of index;