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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

• Scaling Twitter: Making Twitter 10000 Percent Faster
• Scaling Twitter
• Blaine Cook on Scaling Twitter - YouTube

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# Modify this file accordingly for your specific requirement.
# http://www.thegeekstuff.com
# 1. Delete all existing rules
iptables -F

# 2. Set default chain policies
iptables -P INPUT DROP
iptables -P FORWARD DROP
iptables -P OUTPUT DROP

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This notes applied to Kubernetes version 1.9.1-00 on Ubuntu Xenial.

Basic concept

TO BE WRITTEN

Installation and starting up 🏁

Installation

• Swap should be disabled (see /etc/fstab)

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# +----------------------------+
# |         IDE files          |
# +----------------------------+
/.idea


# +----------------------------+
# |          Vagrant           |
# +----------------------------+
/.vagrant

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Notes on privacy and data collection of Matrix.org

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This work is licensed under CC BY-NC-SA 4.0. See Editorial Notes for Attribution details.

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DISCLAIMER: This research and investigation work is based on several years of experience within the Matrix ecosystem and validation of facts via public and private communication. Reverse engineering was used to ensure some of the statements presented as facts regarding implementations are accurate. >

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# Usage
# host supply IP
# -t(tags) run specific tasks ie. db=master, dbslave=slave1/2, promote=update slave to master, remove= remove host
# ansible-playbook pg.yml -e "host=192.169.99.2 -t db        ##Build Master
# ansible-playbook pg.yml -e "host=192.168.99.3" -t dbslave  ##Build Slave
# ansible-playbook pg.yml -e "host=192.168.99.3" -t promote  ##Promoe slave to master
# ansible-playbook pg.yml -e "host=192.168.99.2" -t remove   ##Remove node from cluster
# ansible-playbook /var/lib/pgsql/pg.yml -e "host=192.168.99.4" -s -t db --user=user1 --ask-sudo-pass  ##Ubuntu
# Created Bimal Patel
---

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#!/usr/bin/env bash

# https://code.google.com/p/chromium/issues/detail?id=226801
url='https://chromium.googlesource.com/chromium/src/net/+/master/http/transport_security_state_static.json?format=TEXT';
curl -#s "${url}" | \
	base64 --decode | \
	sed '/^ *\/\// d' | \
	sed '/^\s*$/d' > hsts.json;

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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: