Devendra Tiwari devndone

On availability aspects of microservices

This post is in response to the WeekendDevPuzzle of 2022-01-29, which has submissions from people who chose to share their perspectives on the puzzle. I'll be linking this post to this Twitter thread, to avoid polluting the original one.

Motivation for today's topic

Unlike the usual peel the onion kind of topics, this one focuses more on how we think & our mental models of architectural decisions. But there's more.

Over the past 15 yrs, programming has become extremely accessible. While that's undoubtedly a good thing, it's become much easier to just rely on best practice, with or without context. Today's puzzle was designed to bring to the discussion table, that context, albeit in a super simplified fashion.

Dissecting the puzzle

Let's dissect the question, and bring out the core elements of it.

Core Information Security

What is information security and how is it achieved?
What are the core principles of information security?
What is the CIA triangle?
What is non-repudiation (as it applies to IT security)?

Story: Writing Scripts with Go

This is a story about how I tried to use Go for scripting. In this story, I’ll discuss the need for a Go script, how we would expect it to behave and the possible implementations; During the discussion I’ll deep dive to scripts, shells, and shebangs. Finally, we’ll discuss solutions that will make Go scripts work.

Why Go is good for scripting?

While python and bash are popular scripting languages, C, C++ and Java are not used for scripts at all, and some languages are somewhere in between.

Update, September 2016

OK, you can pretty much ignore what I wrote below this update, because it doesn't really apply anymore.

I wrote this over a year ago, and at the time I had spent a couple of weeks trying to get Kafka 0.8 working with .NET and then Node.js with much frustration and very little success. I was rather angry. It keeps getting linked, though, and just popped up on Hacker News, so here's sort of an update, although I haven't used Kafka at all this year so I don't really have any new information.

In the end, we managed to get things working with a Node.js client, although we continued to have problems, both with our code and with managing a Kafka/Zookeeper cluster generally. What made it worse was that I did not then, and do not now, believe that Kafka was the correct solution for that particular problem at that particular company. What they were trying to achieve could have been done more simply with any number of other messaging systems, with a subscriber reading messages off and writing

VisualSFM by Changchang Wu

Probably the most straight forward way to start generating Point Clouds from a set of pictures.

VisualSFM is a GUI application for 3D reconstruction using structure from motion (SFM). The reconstruction system integrates several of my previous projects: SIFT on GPU(SiftGPU), Multicore Bundle Adjustment, and Towards Linear-time Incremental Structure from Motion. VisualSFM runs fast by exploiting multicore parallelism for feature detection, feature matching, and bundle adjustment.

For dense reconstruction, this program supports Yasutaka Furukawa's PMVS/CMVS tool chain, and can prepare data for Michal Jancosek's CMP-MVS. In addition, the output of VisualSFM is natively supported by Mathias Rothermel and Konrad Wenzel's [SURE]

	#!/bin/bash
	#
	# chkconfig: 35 95 05
	# description: Hello world application.

	# Run at startup: sudo chkconfig hello-world on

	# Load functions from library
	. /etc/init.d/functions

	<!doctype html>
	<html ng-app="Demo">
	<head>
	<meta charset="utf-8" />

	<title>
	Preloading Images In AngularJS With Promises
	</title>
	</head>
	<body ng-controller="AppController">

	<!DOCTYPE html>
	<html ng-app="test">
	<head>
	<title>Performance Comparison for Knockout, Angular and React</title>
	<link href="//cdnjs.cloudflare.com/ajax/libs/twitter-bootstrap/3.3.1/css/bootstrap.css" rel="stylesheet" />
	<style type="text/css">
	* { box-sizing:border-box; }
	body { padding:30px 0; }
	h2 { margin:0; margin-bottom:25px; }
	h3 { margin:0; padding:0; margin-bottom:12px; }

	import java.nio.file.Files
	import scala.concurrent.duration._
	import java.nio.file.Paths
	import scala.collection.JavaConverters._
	import scala.concurrent.ExecutionContext
	import org.elasticsearch.client.transport.TransportClient
	import org.elasticsearch.common.settings.ImmutableSettings
	import org.elasticsearch.common.transport.InetSocketTransportAddress
	import com.sksamuel.elastic4s.ElasticClient
	import com.sksamuel.elastic4s.ElasticDsl._

	//// THIS CODE AND INFORMATION IS PROVIDED "AS IS" WITHOUT WARRANTY OF
	//// ANY KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING BUT NOT LIMITED TO
	//// THE IMPLIED WARRANTIES OF MERCHANTABILITY AND/OR FITNESS FOR A
	//// PARTICULAR PURPOSE.
	////
	//// Copyright (c) Microsoft Corporation. All rights reserved

	#include "D2DPrintingFromDesktopApps.h"

	#include <commdlg.h>