Kafka architecture and design

Best of breed streaming platform. start your 30-day free trial now! Deploy a modern open-source database in 10 minutes, get 99.99% uptime Narrow Down Your Options For Application Development And App To App Communication. Learn More About Kafka® By Diving Into Open Source Messaging Kafka Architecture - Kafka Cluster. Let's describe each component of Kafka Architecture shown in the above diagram: a. Kafka Broker. Basically, to maintain load balance Kafka cluster typically consists of multiple brokers. However, these are stateless, hence for maintaining the cluster state they use ZooKeeper Apache Kafka Architecture. We have already learned the basic concepts of Apache Kafka. These basic concepts, such as Topics, partitions, producers, consumers, etc., together forms the Kafka architecture. As different applications design the architecture of Kafka accordingly, there are the following essential parts required to design Apache.

5 Cloud Platforms · 90+ Regions · 30-Day Free Tria

  1. Kafka Streams provides so-called state stores, which can be used by stream processing applications to store and query data, which is an important capability when implementing stateful operations. The Kafka Streams DSL, for example, automatically creates and manages such state stores when you are calling stateful operators such as join () or.
  2. The Kafka Producer API, Consumer API, Streams API, and Connect API can be used to manage the platform, and the Kafka cluster architecture is made up of Brokers, Consumers, Producers, and ZooKeeper. Despite its name's suggestion of Kafkaesque complexity, Apache Kafka's architecture actually delivers an easier to understand approach to.
  3. This article mainly explains: Kafka architecture design. For more Java related knowledge, you can pay attention to the official account number: 999. preface. At the request of most of my friends, let's have a Kafka episode before yarn, which is relaxing and pleasant. 1、 Kafka Foundation The function of message syste
  4. g & messaging system with capabilities to handle huge loads of data with its distributed, fault tolerant architecture. In this Kafka beginners tutorial, we will explain basic concepts of Kafka, how kafka works, Kafka architecture and Kafka use-cases
  5. Kafka Architecture and Design Principles Because of limitations in existing systems, we developed a new messaging-based log aggregator Kafka. We first introduce the basic concepts in Kafka. A stream of messages of a particular type is defined by a topic. A producer can publish messages to a topic
  6. kafka low-level design and architecture review how would you prevent a denial of service attack from a poorly written consumer? use quotas to limit the consumer's bandwidth
  7. kafka architecture: topics, producers, and consumers. kafka uses zookeeper to manage the cluster. zookeeper is used to coordinate the brokers/cluster topology. zookeeper is a consistent file.

Kafka architecture - Get Aiven for Apache Kafk

In this respect Kafka follows a more traditional design, shared by most messaging systems, where data is pushed to the broker from the producer and pulled from the broker by the consumer. Some logging-centric systems, such as Scribe and Apache Flume , follow a very different push-based path where data is pushed downstream Architecture¶. Kafka Connect has three major models in its design: Connector model: A connector is defined by specifying a Connector class and configuration options to control what data is copied and how to format it. Each Connector instance is responsible for defining and updating a set of Tasks that actually copy the data. Kafka Connect manages the Tasks; the Connector is only responsible.

Kafka Design Motivation. LinkedIn engineering built Kafka to support real-time analytics. Kafka was designed to feed analytics system that did real-time processing of streams. LinkedIn developed. The Kafka architecture is a set of APIs that enable Apache Kafka to be such a successful platform that powers tech giants like Twitter, Airbnb, Linkedin, and many others. This Redmonk graph shows the growth that Apache Kafka-related questions have seen on Github, which is a testament to its popularity Kai Waehner discusses why Apache Kafka became the de facto standard and backbone for microservice architectures—not just replacing other traditional middleware but also building the microservices themselves using domain-driven design and Kafka-native APIs like Kafka Streams, ksqlDB, and Kafka Connect Kafka cluster typically consists of multiple brokers to maintain load balance. Kafka brokers are stateless, so they use ZooKeeper for maintaining their cluster state. One Kafka broker instance can handle hundreds of thousands of reads and writes per second and each bro-ker can handle TB of messages without performance impact

What Is Kafka - Build NextGen Connected App

Kafka Architecture. Kafka consists of Records, Topics, Consumers, Producers, Brokers, Logs, Partitions, and Clusters. Records can have key (optional), value and timestamp. Kafka Records are immutable. A Kafka Topic is a stream of records ( /orders, /user-signups ). You can think of a Topic as a feed name Kafka's architecture however deviates from this ideal system. Some of the key differences are: Messaging is implemented on top of a replicated, distributed commit log. The client has more functionality and, therefore, more responsibility. Messaging is optimized for batches instead of individual messages Topic Design. One great feature that Kafka has over many other streaming / messaging platforms is the concept of a or for a choreography architecture — triggering actions based on things.

Kafka · Delft Students on Software Architecture: DESOSA 2017

Kafka Architecture: Low-Level Design. This post really picks off from our series on Kafka architecture which includes Kafka topics architecture , Kafka producer architecture , Kafka consumer architecture and Kafka ecosystem architecture. This article is heavily inspired by the Kafka section on design . You can think of it as the cliff notes Kafka Architecture. At a high level, Kafka writes events into an immutable log, partitioned per topic. Producers of events keep writing to the topic and consumers of events keep reading from the. Reading Time: 2 minutes In 2003, Gartner defined event-driven architecture (EDA) as the industry best practice for long-running processes. EDA made it possible to design asynchronous processes where an event is posted and the one who posts it is disconnected from the processing of the event — otherwise known as fire and forget So we may conclude that we have seen what a zookeeper is, how it works means its architecture, and how necessary it is for Kafka to communicate with it. Recommended Articles. This is a guide to Kafka Zookeeper. Here we discuss introducing Kafka zookeeper, why we need it, how to use it, and Zookeeper architecture, respectively

Confluent Platform Reference Architecture. This white paper provides a reference for data architects and system administrators who are planning to deploy Apache Kafka and Confluent Platform in production. You will learn: Important considerations for production deployments to ensure the success and scalability of your streaming platform AKS blue/green deployment pattern and kafka. Architecture and Design. shadowvane 28 March 2021 22:12 #1. Hi all, I hope this is the correct channel for this question: I have two AKS clusters running without Kafka, in two different regions - blue/green deployment on the cluster level. How would I go about implementing Kafka into my AKS with the. 5. Your overall understanding of Kafka is not 100% correct. 1) Kafka basically scales over partitions -- thus, for the brokers, there is no difference (from a performance perspective) if you use 1 topic with 1000 partitions of 1000 topics with 1 partition each. (If you plan to use Kafka Streams (aka Streams API), using a singe topic with 1000.

How to design Kafka architecture so that no tenant can get delayed for their own events due to other's process. Ask Question Asked 17 days ago. Active 16 days ago. Viewed 26 times 0 We have one Multi-tenant SaaS platform. We use the following tech stack right now. 1. Python, MySQL, Redis, SQS, PHP Kafka is part of the architecture, while Akka is an implementation choice for one of the component of the business application deployed inside the architecture. vert.x is another open source implementation of such internal messaging mechanism but supporting more language: Java, Groovy, Ruby, JavaScript, Ceylon, Scala, and Kotlin

Kafka Architecture and Its Fundamental Concepts - DataFlai

Apache Kafka Architecture - javatpoin

Building Reliable Reprocessing and Dead Letter Queues with Apache Kafka. In distributed systems, retries are inevitable. From network errors to replication issues and even outages in downstream dependencies, services operating at a massive scale must be prepared to encounter, identify, and handle failure as gracefully as possible Kafka's Castle, built in 1968, was one of the earlier projects completed by Ricardo Bofill, a Spanish Postmodern architect known for apartment buildings as monumental as they were thought-provoking Lambda architecture can be considered as near real-time data processing architecture. As mentioned above, it can withstand the faults as well as allows scalability. It uses the functions of batch layer and stream layer and keeps adding new data to the main storage while ensuring that the existing data will remain intact Zoe Vance, Madhav Sathe discuss the architecture and design of RabbitMQ and Kafka, and how that impacts performance, scalability and app design. Bio Zoe Vance is a Product Lead, Pivotal Apache Kafka is a distributed publish-subscribe messaging system. This article covers the architecture model, features and characteristics of Kafka framework and how it compares with traditional.

Apache Kafk

Figure 2: Kafka replication topology in two regions . In each region, the producers always produce locally for better performance, and upon the unavailability of a Kafka cluster, the producer fails over to another region and produces to the regional cluster in that region. A key piece in this architecture is message replication Kafka Architecture Ranganathan Balashanmugam @ran_than Apache: Big Data 2015. Helló Budapest. About Me Graduated as Civil Engineer. <dev> 10+ years </dev> <Thoughtworker from=India/> Organizer of Hyderabad Scalability Meetup with 2000+ members

architecture design that can be developed and implemented. We will advise and guide your team on how best to use each product component, share best practices and flag potential pitfalls. If your team is new to Confluent and Apache Kafka®, a base level of knowledge is required to get the most out of the engagement. Havin Introducing Apache Kafka & Event-Driven Architecture Support in ReadyAPI. In 2006, SoapUI was developed with a singular goal: create a simple, open‑source SOAP API testing tool. Since then, developers have contributed code and provided valuable feedback to help SmartBear transform SoapUI into ReadyAPI, the most powerful API testing platform.

Through detailed examples, you'll learn Kafka's design principles, reliability guarantees, key APIs, and architecture details, including the replication protocol, the controller, and the storage layer. Understand publish-subscribe messaging and how it fits in the big data ecosystem Its ability to provide a unique design makes it suitable for various software architectural challenges. Who is the right audience for Apache Kafka? Apache Kafka is the best-suited course for aspirants willing to make their career as Big Data Analysts, Big Data Hadoop Developers, Architects, Testing Professionals, Project Managers, and Messaging. This video covers When to use Kafka and when to use REST Templates in Microservices Architecture Related Playlist=====Spring Boot Primer - ht.. Apache Kafka on HDInsight architecture. The following diagram shows a typical Kafka configuration that uses consumer groups, partitioning, and replication to offer parallel reading of events with fault tolerance: Apache ZooKeeper manages the state of the Kafka cluster. Zookeeper is built for concurrent, resilient, and low-latency transactions

Kafka on the Shore at Lincoln Center - Berkshire Fine Arts

Apache Kafka Architecture: A Complete Guide - Instaclust

Architecture design of real time data synchronization service (Canal + Kafka) Support to post the subscribed data to Kafka. After canal 1.1.1, the server can post the subscribed data to MQ through simple configuration. Currently, the supported MQ are Kafka and rocketmq, which replace the manual coding delivery in the old version.. Event sourcing is a style of application design where state changes are logged as a time-ordered sequence of records. Kafka's support for very large stored log data makes it an excellent backend for an application built in this style. Commit Log Kafka can serve as a kind of external commit-log for a distributed system

Apache Kafka is a great tool that is commonly used for this purpose: to enable the asynchronous messaging that makes up the backbone of a reactive system. If you're new to Kafka, check out our introduction to Kafka article. But where does Kafka fit in a reactive application architecture and what reactive characteristics does Kafka enable Apache Kafka Architecture | Udemy. Preview this course. Current price $12.99. Original Price $24.99. Discount 48% off. 11 hours left at this price! Add to cart. Buy now. 30-Day Money-Back Guarantee

Apache Kafka Architecture. As described by its creators, Apache Kafka is publish-subscribe messaging rethought as a distributed commit log. This log-based design principle, described by Jay Kreps one of Apache Kafka's creators, has guided many design choices in the Apache Kafka architecture Q: Sender & Receiver each having: 3 Zookeepers, 5 Brokers and 3 Kafka Connect Servers. Total 22 servers! Is this illogical, any comments from Kafka/MQ experienced guys? It hugely depends on what you're building, the kind of throughput you need, availability requirements, and so on. This Enterprise Reference Architecture is a great place to start

Explain the excellent architecture design behind Kafka

Apache Kafka is a distributed streaming platform with partitioning, replication, fault tolerance and scaling baked into the architecture and design. It offers the scalability of a distributed file system, supporting hundreds of MB/s throughput, TBs of data per node in a Kafka cluster, and can run on commodity hardware on-premise and on cloud. Apache Kafka was designed to address large-scale, data movement problems and has enabled thousands of companies large and small to achieve successes not otherwise achievable with existing messaging systems. In this course, Getting Started with Apache Kafka, you will get a thorough understanding of Apache Kafka's architecture and how it has. of Kafka in the modern data distribution pipeline and be able to discuss core Kafka architectural concepts. The test specification is intended to address the knowledge and skill areas that demonstrate proficiency as a Kafka Developer. The basic knowledge and skills required at this level • Overall Apache Kafka architecture and design Apache Kafka can be used for numerous application types to power an event-driven architecture, from real-time message distribution to streaming events. Take for example a manufacturing company that is moving to an event-driven architecture to provide more automation, more tracking, and faster delivery of products and services Ordinarily, when building a replay system that requires storage like this, one might use an architecture based on Hadoop and HDFS. We chose Apache Kafka instead for two reasons: the real-time system was built on a similar pub-sub architecture the volume of events to be stored by the replay system isn't petabyte scale

Kafka Introduction, Kafka Architecture, Kafka Use-Cases

My Client is looking for Kafka / Data Architect who will come in and design Kafka for one of their large work streams. This role is an initial 3 months contract (Outside IR35) and fully remote. Skills Needed; Have a track record with Kafka technology, with hands-on production experience and a deep understanding of the Kafka architecture Fine-tune your Apache Kafka deployment. Manage architecture for APIs, topics, partitions. Optimize Kafka APIs, partitions, and topics. Improve data layer performance Kafka Enterprise Architecture . Apache Kafka is an open source streaming platform. It is designed to provide all the necessary components of managing data streams. However, developing enterprise level solutions is requires you to cover a variety of aspects

Kafka Detailed Design and Ecosystem - DZone Big Dat

How to design Kafka architecture so that no tenant can get delayed for their own events due to other's process We have one Multi-tenant SaaS platform. We use the following tech stack right now. 1. Python, MySQL, Redis, SQS, PHP. We have one third-party integration for a few events/notifications. Let's take CustomerUpdate for example Modern event-driven architecture has become synonymous with Apache Kafka. This book is a complete, A-Z guide to Kafka. From introductory to advanced concepts, it equips you with the necessary tools and insights, complete with code and worked examples, to navigate its complex ecosystem and exploit Kafka to its full potential Kafka's through its distributed design allows a large number of permanent or ad-hoc consumers, being highly available and resilient to node failures, also supporting automatic recovery. These characteristics make Kafka an ideal fit for communication and integration between components of large scale data systems Apache Kafka is a unified platform that is scalable for handling real-time data streams. Apache Kafka Tutorial provides details about the design goals and capabilities of Kafka. By the end of these series of Kafka Tutorials, you shall learn Kafka Architecture, building blocks of Kafka : Topics, Producers, Consumers, Connectors, etc., and examples for all of them, and build a Kafka Cluster 2013 Kitchen and Bath Design Guide. Case Study: Arts and Crafts Kitchen. An Arts and Crafts kitchen renovation in Minneapolis, Minn. Case Study: Kafka Residence Kitchen. A Southern California kitchen blends seamlessly into a living/dining room and deck. Case Study: Ludwig Residence Bath. A dramatically integrated master bedroom and bath in San.

Kafka Architecture - DZone Big Dat

Platforms such as Apache Kafka Streams can help you build fast, scalable stream processing applications, but big data engineers still need to design smart use cases to achieve maximum efficiency Kafka is responsible for moving data from fronting Kafka to various sinks: S3, Elasticsearch, and secondary Kafka. Routing of these messages is done using the Apache Samja framework. Traffic sends by the Chukwe can be full or filtered streams so sometimes you may have to apply further filtering on the Kafka streams BIG DATA,KAFKA.Kafka is a message streaming system with high throughput and low latency. It is widely adopted in lots of big companies. A well configured Kafka cluster can achieve super high throughput with millionsPixelstech, this page is to provide vistors information of the most updated technology information around the world. And also, it will provide many useful tips on our further career. Setting up the architecture is a little more complicated. For example, an e-shopping organization maintains a production database that keeps account of all transactions. Streaming CDC using Kafka can help in this situation by providing the most recent transactions in a fixed period to the OLAP system The design illustrated below is massively scalable, battle hardened, centrally monitored through Cloudera Manager, fault tolerant, and supports replay. One thing to note before we go to the next streaming architecture is how this design gracefully handles failure. The Flume Sinks pull from a Kafka Consumer Group

Learn about the Kafka Connect architecture design in your enterprise.... This website uses cookies and other tracking technology to analyse traffic, personalise ads and learn how we can improve the experience for our visitors and customers. We may also share information with trusted third-party providers. For an optimal-browsing experience. Streaming Architecture, an Apache Kafka book includes: Key elements in good design for streaming analytics, focusing on the essential characteristics of the messaging layer. How stream-based architectures are helpful to support microservices. Specific use cases such as fraud detection and geo-distributed data streams

Apache Kafka is one of the most popular open-source event streaming platforms. It is horizontally scalable, distributed, and fault-tolerant by design. Kafka's programming model is based on the publish-subscribe pattern. With Kafka, publishers send messages to topics, which are named logical channels. A subscriber to a topic receives all the. Apache Kafka is an open-source stream-processing software platform which is used to handle the real-time data storage. It works as a broker between two parties, i.e., a sender and a receiver. It can handle about trillions of data events in a day. Apache Kafka tutorial journey will cover all the concepts from its architecture to its core concepts Kafka on HDInsight allows configuration of storage and scalability for Kafka clusters. Cosmos DB provides fast, predictable performance and scales seamlessly as your application grows. The event sourcing microservices-based architecture of this scenario also makes it easier to scale your system and expand its functionality Ideally this number should be decided before you design your microservices based on your volume forecast. But it can always be incremented in Kafka when your volume increases. Try to configure the partition count as a natural number, best choice would be multiples of 5 or 10

Kafka Design Confluent Documentatio

  1. For example, if a customer doesn't have any experience with Kafka or Messaging, it will be very hard to establish this on the go. So they might be better of using a REST-based architecture, especially if, for example, they are deep into Spring Boot, making some of the challenges relatively easy to solve
  2. g, Apache Storm, and Apache Samza
  3. g for Apache Kafka (Amazon MSK) clusters in this example, but the same architecture also applies to self-managed Apache Kafka. Amazon MSK is a fully managed service that makes it easy for you to build and run Apache Kafka to process strea
  4. Developers are combining Event Driven Architecture (EDA) and Microservices architectural styles to build systems that are extremely scalable, available, fault tolerant, concurrent, and easy to develop and maintain. In this article, I'll discuss the architectural characteristics, complexities, concerns, key architectural considerations, and best practices when using these two architectural.
  5. This is the big picture of the architecture, the API Gateway is Kong, the Messaging Service Kafka and the Database per Service MongoDB.The project is here on Github.. Each Microservice is implemented following the Hexagonal architecture style: the core logic is embedded inside a hexagon, and the edges of the hexagon are considered the input and output. The aim is to layer the objects in a way.
  6. Apache Kafka is the foundation of our CIP architecture. We achieve economies of scale as we acquire data once and consume it many times. Simplified connection of data sources helps reduce our technical debt, while filtering data helps reduce costs to downstream systems

Kafka Connect Architecture Confluent Documentatio

To initiate the Kafka server, you need to initiate the Zookeeper server first then you could fire up the Kafka server. 20. How will you explain the Kafka architecture? Ans:-Kafka product is based on a distributed design where one cluster has multiple brokers/servers associated with it. The 'Topic' will be divided into plenty of partitions. So you've made the enlightened choice to use Kafka in your architecture, and you know you need to provision your cluster using infrastructure as code (IAC), but why stop at just provisioning brokers? In this talk we will explore the available options to make deploying your Kafka-based applications more repeatable, resilient and observable. We'll look at specific examples and techniques for.

Kafka Architecture: Low-Level Design - LinkedI

Akka Microservices Architecture And Design. Nowadays Akka is a popular choice for building distributed systems - there are a lot of case studies and successful examples in the industry. But it still can be hard to switch to actor-based systems, because most of the tutorials and documentation don't show the way to assemble a real application. Challenges of using Apache Kafka. We know Apache Kafka has the features for scalability (partitioning) and reliability (replication). However, to apply the elements to a business use-case takes planning and architecture design. Primarily, there are physical constraints to how scalable and reliable Kafka can perform

The Complete Guide To Kafka Architectur

  1. g message brokers like Apache Kafka transformed event-driven architecture and its possibilities. Yes, both message brokers like RabbitMQ and event strea
  2. Kafka Producers. A producer is a thread safe kafka client API that publishes records to the cluster. It uses buffers, thread pool, and serializers to send data. They are stateless: the consumers is responsible to manage the offsets of the message they read. When the producer connects via the initial bootstrap connection, it gets the metadata.
  3. Following Jason Long's presentation, there was a brief conversation between Jason and Ron Stelmarski, Forum Board member and Design Director at Perkins + Will, about important issues impacting architecture, design and urbanism. Jason Long is a Partner at OMA, one of the world's leading and most innovative design firms
  4. )
  5. Design the Data Pipeline with Kafka + the Kafka Connect API + Schema Registry. Our Ad-server publishes billions of messages per day to Kafka. We soon realized that writing a proprietary Kafka consumer able to handle that amount of data with the desired offset management logic would be non-trivial, especially when requiring exactly once-delivery semantics
  6. g application. If you are not sure what it is, you can compare it with a message queue like JMS, ActiveMQ, RabbitMQ etc. However it can do a lot more than these message queues. Kafka is little bit difficult to set up in local. It is mainly because of its

Microservices, Apache Kafka, and Domain-Driven Design

  1. g platform that is a popular event processing choice. It can handle.
  2. d for your API strategy, too! My article Microservices, Apache Kafka, and Domain-Driven Design should also help you understanding how important the separation of concerns and decoupling is for your enterprise architecture. This is true for Kafka, APIs and other business applications
  3. Event-driven systems reflect how modern businesses actually work-thousands of small changes happening all day, every day. Spring's ability to handle events and easily build applications around them, allows your apps to stay in sync with your business
  4. Event-Driven Architecture is emerging as a key cornerstone enabling modern enterprises to operate in real-time, adapt to changes quickly, and make intelligent business decisions. Event-driven architecture (EDA) is a design paradigm in which a software component executes in response to receiving one or more event notifications.. Combining.
  5. Managed Kafka - Pricing We manage applications at both the host and the guest level. All prices are dependent on current cloud architecture and requirements. Get started with a free quote and architecture assessment
  6. Figure 2 − Migration architecture of legacy applications and databases without lift and shift. Kafka Connect. The Kafka Connect Amazon Redshift Sink connector allows you to stream data from Apache Kafka topics to Amazon Redshift. The connector polls data from Kafka and writes this data to an Amazon Redshift database
  7. Simulates a bank account scenario where an end user adds a income or expense transaction, and it is processed in a ascyncronous event sourcing and CQRS architecture to recalculate the user's bank account balance. The user can also request the balance of it's account. Down here you can see the design: Deploying the external service

In this liveProject, you'll use the Kafka distributed streaming data platform to help convert a legacy order fulfillment system to a sleek new asynchronous event-driven architecture. This architecture needs to deliver services that can scale and evolve independently, to speed up your clients eCommerce app. You'll use the Go language to build a microservice, an event publisher, and multiple. Oct 20, 2017 - Image 4 of 19 from gallery of AD Classics: Kafka's Castle / Ricardo Bofill Taller de Arquitecturas. Photograph by Ricardo Bofil This platform is based on the data hub architecture and utilizes Apache Kafka for high performance and scalability. The Kafka cluster was developed on Google Compute Engine along with some managed services in Google Cloud Platform, such as BigQuery and Pub/Sub, for analysis The purpose of this blog is to summarize and demystify the best practices in creating a sound event topic hierarchy. If you are interested in more detailed documentation on the subject (complete with examples), you can check out this link.. Event-driven architecture, and event-driven microservices have proven to be valuable application design patterns Building systems with Microservices, DDD, CQRS and Event Sourcing. As interest in microservices has grown, the definition has become blurred. Today, microservices are commonly seen as just a distributed system architecture. Learn how the Axon platform helps by providing the foundation for building asynchronous message-driven systems based on.

Apache Kafka - Cluster Architecture - Tutorialspoin

Understand the fundamentals of Apache Kafka including core concepts, architecture and the ecosystem. Learn to build and manage Kafka clusters using industry best practices. Learn to configure, monitor and troubleshoot Kafka clusters. Learn how to code and build applications that can both publish and consume data from a Kafka cluster During the 2020 US Presidential Election, BBC Online served video, audio, and text to over 140 million users. Events like this require the BBC's sites and apps to be at their very best - fast, reliable, and relevant at massive scale. It's been achieved with a modern, cloud-native architecture that's dependable and scalable. In this talk we'll dive into this architecture, t

Architect Philip Johnson Was The Builder of Glass CitiesThe Most Amazing 3D Printed Zoetrope Ever? &#39;All ThingsConnections: Piled Up 5