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global
	log /dev/log	local0
	log /dev/log	local1 notice
	chroot /var/lib/haproxy
	stats socket /run/haproxy/admin.sock mode 660 level admin
	stats timeout 30s
	user haproxy
	group haproxy
	daemon
	maxconn 2048

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MongoDB Performance Troubleshooting Guide

References

Official docs

For all of these docs, be sure to select your MongoDB version from the left dropdown!

• Analyzing MongoDB Performance
• MongoDB Limits & Thresholds

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/*
 * This work (Modern Encryption of a String C#, by James Tuley), 
 * identified by James Tuley, is free of known copyright restrictions.
 * https://gist.github.com/4336842
 * http://creativecommons.org/publicdomain/mark/1.0/ 
 */

using System;
using System.IO;
using System.Text;

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HAProxy and Let's Encrypt

HAProxy is a open-source TCP/HTTP load-balancing proxy server supporting native SSL, keep-alive, compression CLI, and other modern features.

Let’s Encrypt is a free, automated, and open certificate authority (CA), run for the public’s benefit. Let’s Encrypt is a service provided by the Internet Security Research Group (ISRG).

Concept

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Covers both tools

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// Zero-Clause BSD (more permissive than MIT, doesn't require copyright notice)
// 
// Permission to use, copy, modify, and/or distribute this software for any purpose
// with or without fee is hereby granted.
// 
// THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
// WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
// AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT,
// INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS
// OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER

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GoDaddy SSL Certificates PEM Creation for HaProxy (Ubuntu 14.04)

1 Acquire your SSL Certificate

Generate your CSR This generates a unique private key, skip this if you already have one.

sudo openssl genrsa -out  etc/ssl/yourdomain.com/yourdomain.com.key 1024

Next generate your CSR (Certificate Signing Request), required by GoDaddy:

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using System;
using System.Net.Http;
using System.Threading.Tasks;
using System.Text.RegularExpressions;
using System.Threading;
using System.Collections.Generic;
using System.Linq;

using Microsoft.ClearScript.V8;

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using System;
using System.Collections.Generic;
using System.Diagnostics;
using System.Linq;
using System.Threading;
using System.Threading.Tasks;
using StackExchange.Redis;

namespace CitySurvival.Redis
{

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/* BitSet.cs -- A vector of bits.
    Copyright (C) 1998, 1999, 2000, 2001, 2004, 2005  Free Software Foundation, Inc.
 
 This file is part of GNU Classpath.
 
 GNU Classpath is free software; you can redistribute it and/or modify
 it under the terms of the GNU General Public License as published by
 the Free Software Foundation; either version 2, or (at your option)
 any later version.