mdigan

from flask import Flask, request, session
from sqlalchemy import create_engine, Table, MetaData
from sqlalchemy.orm import mapper, relationship, sessionmaker, scoped_session
from sqlalchemy.sql import select

app = Flask(__name__)

engine = create_engine('postgresql+psycopg2://kamal@localhost/clinic_dev')
metadata = MetaData(bind=engine)
DBSession = scoped_session(sessionmaker(bind=engine))

mdigan

# Load balancer configuration
upstream exampleApp {
    # Directs to the process with least number of connections.
    least_conn;

    # One failed response will take a server out of circulation for 20 seconds.
    server 127.0.0.1:10080 fail_timeout=20s;
    server 127.0.0.1:10081 fail_timeout=20s;
    #server 127.0.0.1:10082 fail_timeout=20s;
    #server 127.0.0.1:10083 fail_timeout=20s;

mdigan

Node.js - npm Cheat Sheet

(Full description and list of commands at - https://npmjs.org/doc/index.html)

##List of less common (however useful) NPM commands

######Install a package and also update package.json with the installed version and package name.

mdigan

####################################
# BASIC REQUIREMENTS
# http://graphite.wikidot.com/installation
# http://geek.michaelgrace.org/2011/09/how-to-install-graphite-on-ubuntu/
# Last tested & updated 10/13/2011
####################################

cd
sudo apt-get update
sudo apt-get upgrade

mdigan

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?

mdigan

#!/usr/local/bin/python

import os
os.environ["PYSPARK_SUBMIT_ARGS"] = \
        "--packages com.basho.riak:spark-riak-connector_2.10:1.6.0 \
        pyspark-shell"

import findspark, time
findspark.init()