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#!/bin/sh
set -u
set -e
# Example init script, this can be used with nginx, too,
# since nginx and unicorn accept the same signals

# Feel free to change any of the following variables for your app:
APP_ROOT=/k/app_name/current
PID=/var/run/unicorn/unicorn.pid
ENV=production

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#!/usr/bin/env sh

##
# This is script with usefull tips taken from:
#   https://github.com/mathiasbynens/dotfiles/blob/master/.osx
#
# install it:
#   curl -sL https://raw.github.com/gist/2108403/hack.sh | sh
#

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def run_pg_fouine():
    info = host_info[env.host_string]
    db_name = info.tags.get('Name')
    sudo('perl -pi -e "s/log_min_duration_statement = .*/log_min_duration_statement = 0/" /etc/postgresql/9.*/main/postgresql.conf')
    sudo('/etc/init.d/postgresql reload')
    time.sleep(30)
    sudo('perl -pi -e "s/log_min_duration_statement = .*/log_min_duration_statement = 500/" /etc/postgresql/9.*/main/postgresql.conf')
    sudo('/etc/init.d/postgresql reload')
    run('tail -n 100000 /var/log/postgresql/postgresql-9.*-main.log > /tmp/pgfouine.txt')
    run('gzip -f /tmp/pgfouine.txt')

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require "cuba"

run Cuba.new { on(root) { res.write "hello, world" } }

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class Book < Ohm::Model
  collection :authors, :Author
end

class Author < Ohm::Model
  reference :book, :Book
  attribute :name
  attribute :mood
  index :mood
end

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#!/usr/bin/env sh

##
# This is script with usefull tips taken from:
#   https://github.com/mathiasbynens/dotfiles/blob/master/.osx
#
# install it:
#   curl -sL https://raw.github.com/gist/2108403/hack.sh | sh
#

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$stack, $draws = [], {}

def method_missing *args
  return if args[0][/^to_/]
  $stack << args.map { |a| a or $stack.pop }
  $draws[$stack.pop(2)[0][0]] = args[1] if args[0] == :<
end

class Array
  def +@

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check process redis-server
    with pidfile "/var/run/redis.pid"
    start program = "/etc/init.d/redis-server start"
    stop program = "/etc/init.d/redis-server stop"
    if 2 restarts within 3 cycles then timeout
    if totalmem > 100 Mb then alert
    if children > 255 for 5 cycles then stop
    if cpu usage > 95% for 3 cycles then restart
    if failed host 127.0.0.1 port 6379 then restart
    if 5 restarts within 5 cycles then timeout

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[{"event"=>"inbound",
  "ts"=>1348084981,
  "msg"=>
   {"raw_msg"=>
     "Received: from mail-pb0-f50.google.com (mail-pb0-f50.google.com [209.85.160.50])\n\tby app02.transact (Postfix) with ESMTPS id 113FA160008E\n\tfor <[email protected]>; Wed, 19 Sep 2012 16:03:01 -0400 (EDT)\nReceived: by pbcmd12 with SMTP id md12so3511454pbc.37\n        for <[email protected]>; Wed, 19 Sep 2012 13:03:00 -0700 (PDT)\nX-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed;\n        d=google.com; s=20120113;\n        h=mime-version:from:date:message-id:subject:to:content-type\n         :content-transfer-encoding:x-gm-message-state;\n        bh=nj7aRozzB6DfuzLS5/RWru2ni7V73l9sEZWbQhPgc4Y=;\n        b=TyTdKUhjpecuS7QeXUN8cP23fuG8nar8EdkyHuNqyDPBVm8n5R1bH+YLJEL2KhZ2kf\n         EskBsvgjKW2qallcEcN+yoI6JR16g6mXzRTGXENMCJ2fI9sbTo1a3K3ZQ9AfFbjOTtDf\n         F8L1PF8HpHtXRDAYsPRSlc6JCaAzWMfscE0l9g63DMx0jxC6hkpEGzNBlBUqK+hV7y6w\n         FeJ6njxlS+1x2/UfjYj8Y9rKZNWCbElGnHOIvpDeq8AE/RXWXs06/G8ggSB8lr90MfCj\n         u

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I have some early benchmark results for our work on a high performance NATS server in Go.

Quick Summary:
We can process ~2M msgs/sec through the system, and the ingress and egress are fairly well balanced.

The basics of the architecture are intelligent buffering and IO calls, fast hashing algorithms and subject distributor/routing, and a zero-allocation hand-written protocol parser.

In addition, I used quite a bit of inlining to avoid function overhead, no use of defer, and little to no object allocation within the fast path. I will share more details and the code at a future date.