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Running GPU Accelerated Games with OpenShift Virtualization

Introduction

The following document describes at a high level how one can use OpenShift Virtualization, an NVIDIA GPU, and VirtualGL to run hardware accelerated remote games.

Requirements

OpenShift 4.8 or Higher
OpenShift Virtualization 4.8 or higher

Code is clean if it can be understood easily – by everyone on the team. Clean code can be read and enhanced by a developer other than its original author. With understandability comes readability, changeability, extensibility and maintainability.

General rules

Follow standard conventions.
Keep it simple stupid. Simpler is always better. Reduce complexity as much as possible.
Boy scout rule. Leave the campground cleaner than you found it.
Always find root cause. Always look for the root cause of a problem.

Design rules

Convert MOV to GIF using FFmpeg and ImageMagick

I tried a few different techniques to make a GIF via command-line and the following gives me the best control of quality and size. Once you're all setup, you'll be pumping out GIFs in no time!

Preparation

Install FFmpeg

$ brew install ffmpeg [all your options]
- Example: $ brew install ffmpeg --with-fdk-aac --with-ffplay --with-freetype --with-frei0r --with-libass --with-libvo-aacenc --with-libvorbis --with-libvpx --with-opencore-amr --with-openjpeg --with-opus --with-rtmpdump --with-schroedinger --with-speex --with-theora --with-tools

Install ImageMagick

System Design Cheatsheet

Picking the right architecture = Picking the right battles + Managing trade-offs

Basic Steps

Clarify and agree on the scope of the system

User cases (description of sequences of events that, taken together, lead to a system doing something useful)
- Who is going to use it?
- How are they going to use it?

Git Commit Best Practices

Basic Rules

Commit Related Changes

A commit should be a wrapper for related changes. For example, fixing two different bugs should produce two separate commits. Small commits make it easier for other developers to understand the changes and roll them back if something went wrong. With tools like the staging area and the ability to stage only parts of a file, Git makes it easy to create very granular commits.

Commit Often

Committing often keeps your commits small and, again, helps you commit only related changes. Moreover, it allows you to share your code more frequently with others. That way it‘s easier for everyone to integrate changes regularly and avoid having merge conflicts. Having large commits and sharing them infrequently, in contrast, makes it hard to solve conflicts.

	#!/bin/bash
	#
	# * For DSM v7.x *
	#
	# How to use this script:
	# 1. Get your 3 PEM files ready to copy over from your local machine/update server (privkey.pem, fullchain.pem, cert.pem)
	# and put into a directory (this will be $CERT_DIRECTORY).
	# Personally, I use this script (https://gist.github.com/catchdave/3f6f412bbf0f0cec32469fb0c9747295) to automate steps 1 & 4.
	# 2. Ensure you have a user setup on synology that has ssh access (and ssh access is setup).
	# This user will need to be able to sudo as root (i.e. add this line to sudoers, <USER> is the user you create):

Service	Type	Storage	Limitations
Amazon DynamoDB	⚠️ Proprietary NoSQL	25 GB	⚠️ Payment method required
Amazon RDS	⚠️ Proprietary RDBMS		⚠️ Only free for 1 year
Azure SQL Database	MS SQL Server		⚠️ Only free for 1 year
👉 Clever Cloud	PostgreSQL, MySQL, MongoDB, Redis	256 MB (PostgreSQL)	Max 5 connections (PostgreSQL)


	import Accelerate

	/// This object provides easy color sampling of the `capturedImage` property of an ARFrame.
	///
	/// - Warning: This class is NOT thread safe. The `rawRGBBuffer` property is shared between instances
	/// and will cause a lot of headaches if 2 instances try to simultaneously access it.
	/// If you need multi-threading, make the shared buffer an instance property instead.
	/// Just remember to release it when you're done with it.
	class CapturedImageSampler {

	#!/usr/bin/env bash
	# shellcheck disable=SC2034
	# shellcheck disable=SC1091
	# shellcheck disable=SC2154

	# PADD
	#
	# A more advanced version of the chronometer provided with Pihole

	# SETS LOCALE

	// Execute Anonymous script to reset data from a Developer Edition
	// NOTE -- this will delete ALL data, so run this only if you know what you are doing!
	if ([SELECT OrganizationType FROM Organization][0].OrganizationType == 'Developer Edition') {
	DELETE [Select ID from Campaign];
	DELETE [Select ID from Lead];
	DELETE [Select ID from Opportunity];
	DELETE [Select ID from Solution];
	DELETE [Select ID from Product2];
	DELETE [Select ID from PriceBook2 where Name = 'Standard'];
	DELETE [Select ID from Case];