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So you've cloned somebody's repo from github, but now you want to fork it and contribute back. Never fear!

Technically, when you fork "origin" should be your fork and "upstream" should be the project you forked; however, if you're willing to break this convention then it's easy.

* Off the top of my head *

1. Fork their repo on Github
2. In your local, add a new remote to your fork; then fetch it, and push your changes up to it

    git remote add my-fork git@github...my-fork.git

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# install build dependencies
sudo yum install -y git-core zlib zlib-devel gcc-c++ patch readline readline-devel libyaml-devel libffi-devel openssl-devel make bzip2 autoconf automake libtool bison curl sqlite-devel

# clone and install rbenv environment
cd ~
git clone git://github.com/sstephenson/rbenv.git .rbenv
git clone git://github.com/sstephenson/ruby-build.git ~/.rbenv/plugins/ruby-build
echo 'export PATH="$HOME/.rbenv/bin:$HOME/.rbenv/plugins/ruby-build/bin:$PATH"' >> ~/.bash_profile
echo 'eval "$(rbenv init -)"' >> ~/.bash_profile

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On Tue Oct 27, 2015, history.state.gov began buckling under load, intermittently issuing 500 errors. Nginx's error log was sprinkled with the following errors:

2015/10/27 21:48:36 [crit] 2475#0: accept4() failed (24: Too many open files) 2015/10/27 21:48:36 [alert] 2475#0: *7163915 socket() failed (24: Too many open files) while connecting to upstream...

An article at http://www.cyberciti.biz/faq/linux-unix-nginx-too-many-open-files/ provided directions that mostly worked. Below are the steps we followed. The steps that diverged from the article's directions are marked with an *.

1. • Instead of using su to run ulimit on the nginx account, use ps aux | grep nginx to locate nginx's process IDs. Then query each process's file handle limits using cat /proc/pid/limits (where pid is the process id retrieved from ps). (Note: sudo may be necessary on your system for the cat command here, depending on your system.)
2. Added fs.file-max = 70000 to /etc/sysctl.conf
3. Added `nginx soft nofile 1

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NGINX Tuning For Best Performance

For this configuration you can use web server you like, i decided, because i work mostly with it to use nginx.

Generally, properly configured nginx can handle up to 400,000 to 500,000 requests per second (clustered), most what i saw is 50,000 to 80,000 (non-clustered) requests per second and 30% CPU load, course, this was 2 x Intel Xeon with HyperThreading enabled, but it can work without problem on slower machines.

You must understand that this config is used in testing environment and not in production so you will need to find a way to implement most of those features best possible for your servers.

• Stable version NGINX (deb/rpm)
• Mainline version NGINX (deb/rpm)

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%define jboss_version_full 7.1.1
 
Summary:        JBoss Application Server
Name:           jboss
Version:        7.1.1
Release:        5
License:        LGPL
BuildArch:      x86_64
Group:          Applications/System
Source0:        http://download.jboss.org/jbossas/7.1/jboss-as-{version}.Final/jboss-as-{version}.Final.zip

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yum -y groupinstall 'Development Tools'
yum -y install wget openssl-devel libxml2-devel libxslt-devel gd-devel perl-ExtUtils-Embed GeoIP-devel rpmdevtools

OPENSSL="openssl-1.0.2j"
NGINX_VERSION="1.11.8-1"
NJS_VERSION="1.11.8.0.1.7-1"

rpm -ivh http://nginx.org/packages/mainline/centos/7/SRPMS/nginx-$NGINX_VERSION.el7.ngx.src.rpm
rpm -ivh http://nginx.org/packages/mainline/centos/7/SRPMS/nginx-module-geoip-$NGINX_VERSION.el7.ngx.src.rpm
rpm -ivh http://nginx.org/packages/mainline/centos/7/SRPMS/nginx-module-image-filter-$NGINX_VERSION.el7.ngx.src.rpm

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 http {

     map $http_user_agent $limit_bots {
         default '';
         ~*(google|bing|yandex|msnbot) $binary_remote_addr;
     }

     limit_req_zone $limit_bots zone=bots:10m rate=1r/m;

     server {