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- What do Etcd, Consul, and Zookeeper do?
  - Service Registration:
    - Host, port number, and sometimes authentication credentials, protocols, versions
      numbers, and/or environment details.
  - Service Discovery:
    - Ability for client application to query the central registry to learn of service location.
  - Consistent and durable general-purpose K/V store across distributed system.
    - Some solutions support this better than others.
    - Based on Paxos or some derivative (i.e. Raft) algorithm to quickly converge to a consistent state.
    - Centralized locking can be based on this K/V store.

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Installing / troubleshooting pants

Requirements

Most of the commons python environment has been developed against CPython 2.6. Things mostly work with CPython 2.7 and recent efforts have been made to improve CPython 3.x and PyPy compatibility. We've explicitly ignored anything prior to CPython 2.6 and in fact generally discourage use against anything less than CPython 2.6.5 as there are known bugs that we're unwilling to fix. We've never even tried running against Jython or

kchida

from abc import ABCMeta, abstractmethod
import threading


class ClockInterface(object):
  __metaclass__ = ABCMeta

  @abstractmethod
  def time(self):
    pass

kchida

INSTALL_ROOT=$HOME/Python
CPY=$INSTALL_ROOT/CPython
PYPY=$INSTALL_ROOT/PyPy

SANDBOX=$(mktemp -d /tmp/python.XXXXXX)

CURL='wget --no-check-certificate'

mkdir -p $INSTALL_ROOT

kchida

Pex.pex: Usage

PEX files are single-file lightweight virtual Python environments.

pex.pex is a utility that:

• creates PEX files
• provides a single use run-environment

Installation

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Python development using Pants

brian wickman - @wickman

[TOC]

Why use Pants for Python development?

Pants makes the manipulation and distribution of hermetically sealed Python environments

kchida

#!/usr/bin/perl
use strict;
use warnings;
use POSIX;
use Getopt::Std;
getopt('h');

##################################################################
#   Monitoring JMX by Radek Antoniuk <[email protected]>  #
##################################################################

kchida

#!/usr/bin/env bash
# memusg -- Measure memory usage of processes
# Usage: memusg COMMAND [ARGS]...
#
# Author: Jaeho Shin <[email protected]>
# Created: 2010-08-16
set -um

# check input
[ $# -gt 0 ] || { sed -n '2,/^#$/ s/^# //p' <"$0"; exit 1; }