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Web Crawler Designs

Can a simple idea like building a web crawler teach you the intricacies of system design? Join me, Ben Kitchell, as we uncover this fascinating intersection. Returning from a brief pause, I'm eager to guide you through the essential building blocks of a web crawler, from queuing seed URLs to parsing new links autonomously. These basic functionalities are your gateway to creating a minimum viable product or acing that system design interview. You’ll gain insights into potential extensions like scheduled crawling and page prioritization, ensuring a strong foundation for tackling real-world challenges.

Managing a billion URLs a month is no small feat, and scaling such a system requires meticulous planning. We’ll break down the daunting numbers into digestible pieces, exploring how to efficiently store six petabytes of data annually. By examining different database models, you’ll learn how to handle URLs, track visit timestamps, and keep data searchable. The focus is on creating a robust system that not only scales but does so in a way that meets evolving demands without compromising on performance.

Navigating the complexities of designing a web crawler means making critical decisions about data storage and system architecture. We’ll weigh the benefits of using cloud storage solutions like AWS S3 and Azure Blob Storage against maintaining dedicated servers. Discover the role of REST APIs in seamless user and service interactions, and explore search functionalities using Cassandra, Amazon Athena, or Google’s BigQuery. Flexibility and foresight are key as we build systems that adapt to future needs. Thank you for your continued support—let’s keep learning and growing on this exciting system design journey together.

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Unlock the secrets of database models and elevate your system design skills with Ben Kitchell on the Learn System Design podcast. What if mastering the art of database modeling could transform your approach to system design interviews and real-world applications? Explore the intricacies of relational data models, where the simplicity of a 2D matrix of rows and columns meets the complexity of larger datasets. Discover how primary and foreign keys form the backbone of relational databases, using practical examples like user and address tables. With the flexibility to integrate seamlessly with API models, you're set to gain insights into using Entity Relationship Diagrams (ERDs) for crafting efficient systems.

Navigate through the hierarchical structure of a restaurant's organizational model to understand complex data relationships better. Learn how to identify and connect entities within systems, illustrated by the example of Spotify. Embrace the iterative planning process as we emphasize the significance of key attributes like IDs and timestamps, allowing you to adapt your database models as new elements emerge. This episode promises a foundational understanding crucial for anyone aspiring to perfect their database modeling skills, ensuring you design systems that are robust and future-proof. Join us for practical tips and strategic insights that will empower your system design journey.

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Dedicated to the memory of Crystal Rose.
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Special thanks to Aimless Orbiter for the wonderful music.
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Unlock the secrets of API design and elevate your system design skills with our latest episode featuring me, Benny Kitchell. Explore the pivotal role APIs play in system design interviews and real-world development, where they act like the seamless communication between waiters, cooks, and customers in a restaurant. Learn how to craft APIs that are tailored to both internal and external developers by understanding their specific needs and objectives, ensuring a smooth and efficient user experience.

We also shine a light on the critical aspects of designing API routes. Understanding user needs and addressing core problems are the bedrock of effective API design. By focusing on functional and non-functional requirements, you'll be equipped to create API routes that meet real-world demands. Discover the importance of API versioning through our Spotify example, where future-proofing your design becomes crucial in maintaining user satisfaction and facilitating seamless updates.

Finally, we delve into the world of real-time data transfer, examining both synchronous and asynchronous communication methods. From the traditional request-response model to the innovative use of WebSockets for instantaneous data exchanges, we break down the strengths and limitations of each approach. Equip yourself with the knowledge to choose the best method for your client-server interactions, ensuring your system design is robust, flexible, and ready for any challenge.

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Dedicated to the memory of Crystal Rose.
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Master the art of system design as Benny Ketchel guides us through the essential skills every senior tech candidate needs to excel, starting with capacity estimates. By the end of this episode, you'll be able to navigate the complexities of bandwidth and data size without getting bogged down in unnecessary arithmetic. We explore how to think like industry leaders at Netflix, Google, and Instagram, focusing on rough estimates, worst-case scenarios, and the use of metric prefixes to simplify calculations. This episode is not just about numbers; it's about understanding the larger picture and harnessing the power of strategic thinking.

Our discussion doesn't stop at capacity. Join us as we tackle the challenges of large-scale systems, offering insights into handling billions of users and managing enormous data streams. Learn to focus on the core components of a system, such as video content for a streaming giant, and balance cost with hardware efficiency. Plus, get a sneak peek at our upcoming special episodes and discover ways to support and engage with our community, from sending feedback to joining us on Patreon. This isn't just a lesson in system design—it's a call to action for aspiring tech leaders to think big and design even bigger.

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Can a simple delay really cost a company millions? We kick off season two of the Learn System Design podcast by exploring this and more. I'm Benny Kitchell, your host, and after a refreshing hiatus, I'm excited to bring you a fresh take on system design interviews and real-world applications. We start with the fundamentals of functional requirements using a relatable example: a music streaming app like Spotify. Discover how to align core functionalities such as song playback, playlist creation, and music recommendations with stakeholder expectations, setting the stage for effective system design.

This episode also delves into the intricacies of caching systems, the critical role of TTL (Time To Live), and the balancing act required by the CAP theorem. We address the importance of understanding both functional and non-functional requirements, emphasizing stakeholder input to ensure a robust design. Key concepts like latency, durability, and partition tolerance are unpacked, highlighting their impact on user experience and system stability. Tune in to gain valuable insights that will not only prepare you for system design interviews but also enhance your technical prowess in the field. Thank you for joining us on this journey; your support means the world!


https://www.cloudflare.com/learning/privacy/what-are-fair-information-practices-fipps/

https://mashable.com/article/myspace-data-loss

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Dedicated to the memory of Crystal Rose.
Email me at [email protected]
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Special thanks to Aimless Orbiter for the wonderful music.
Please consider giving us a rating on ITunes or wherever you listen to new episodes.

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Support the show

Dedicated to the memory of Crystal Rose.
Email me at [email protected]
Join the free Discord
Consider supporting us on Patreon
Special thanks to Aimless Orbiter for the wonderful music.
Please consider giving us a rating on ITunes or wherever you listen to new episodes.

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How does the invisible architecture of the internet keep everything running smoothly? Prepare to have your mind blown as we unravel the mysteries of the Domain Name System (DNS) in this episode of Learn System Design. We'll guide you through the intricate process of how your browser finds the correct IP address for a domain name, likening DNS to an enormous, sophisticated key-value database. Discover the essential components that make DNS work seamlessly, from DNS servers and resource records to caching mechanisms. We break down the DNS hierarchy, explaining the pivotal roles of recursive resolvers, root name servers, and top-level domain servers.

But that's not all—we're also diving deep into the world of service discovery patterns. Which is better: client-side or server-side discovery? We'll weigh the pros and cons of each, spotlighting real-world examples like Netflix's Eureka and AWS Elastic Load Balancer. Learn why a service registry is crucial for maintaining an updated list of services and how heartbeat checks fit into this ecosystem. Finally, we explore three popular service discovery methods—DNS-based, Apache Zookeeper, and sidecar services—giving you an in-depth look at their benefits and limitations. This episode is your ultimate guide to building robust and efficient systems, so tune in and elevate your system design knowledge!

Learn more about the different types of DNS Records (Zone files)

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Dedicated to the memory of Crystal Rose.
Email me at [email protected]
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Special thanks to Aimless Orbiter for the wonderful music.
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Imagine your website could handle the furious influx of a flash sale without breaking a sweat. That's the magic of load balancers, the unsung heroes of system design, which we dissect in this episode to help your services run smoothly even under the avalanche of high traffic. Together with industry experts, we unravel the mystery behind these traffic conductors, ensuring you grasp the significance of active-passive and active-active setups to avoid the dreaded single point of failure. We also pit hardware against software load balancers in an epic showdown, discussing how each fares in terms of performance, flexibility, and cost to help you architect a robust and scalable system.

As the conversation heats up, we chart the terrain of load balancing algorithms, where each choice can lead to triumph or turmoil for your server efficiency. Get ready to be enlightened on the intricacies of weighted least connections, least response time strategies, and how real-time data can empower your system to channel web traffic with the precision of a symphony conductor. We're not just talking about keeping your digital lights on; it's about fine-tuning your system's performance to handle the crescendo of demands. So stay with us, because next time we'll be navigating the complex waters of DNS and network management, adding another layer to your growing mastery of system design.

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Dedicated to the memory of Crystal Rose.
Email me at [email protected]
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Special thanks to Aimless Orbiter for the wonderful music.
Please consider giving us a rating on ITunes or wherever you listen to new episodes.

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Discover the secret sauce that makes software systems scalable and robust as we dissect the architecture that powers modern applications. You're about to get a masterclass in software design, where we unravel the complex world of monolithic and microservice architectures. Say goodbye to confusion around when to stick with the simplicity of a monolith and when to break free into the modular world of microservices. We'll walk you through the need for message brokers and queues in this digital maze, ensuring your journey in software scalability is as smooth as possible.

Then, fasten your seatbelts as we delve into the messaging protocols that keep the world connected. MQTT and AMQP are more than just acronyms; they're the backbone of reliable communication in distributed systems. We'll demystify MQTT's retained messages and 'Last Will' features, and break down AMQP's advanced message handling that's critical in sectors like banking. This episode is jam-packed with insights that promise to elevate your understanding of the intricate dance of message exchange types and delivery processes. Tune in and equip yourself with the knowledge to architect resilient and flexible software systems.

Show Notes:
You can follow Diego's language podcast here: https://diversilingua.com/

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Dedicated to the memory of Crystal Rose.
Email me at [email protected]
Join the free Discord
Consider supporting us on Patreon
Special thanks to Aimless Orbiter for the wonderful music.
Please consider giving us a rating on ITunes or wherever you listen to new episodes.

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Unlock the full potential of your database management with our deep dive into scalability strategies that can revolutionize how you handle data growth and system performance. Jessica Ho, a sharp-minded listener, brought forth questions that led us to explore the intricate dance of read-through versus cache-aside caching. We break down when to use each technique for the utmost data consistency across varying applications. Not stopping there, we also shed light on Redis and its dual capabilities as a powerhouse in-memory data structure store, adept at enhancing your caching solution both locally and remotely.

As we navigate through the labyrinth of database replication, you'll gain an understanding of the follower-leader model and its pivotal role in read-heavy applications—think TikTok or URL shorteners. We don't shy away from discussing the risks of single points of failure and the solutions like automatic failover that keep databases humming along. The conversation gets even more exciting as we delve into the advanced territory of multi-leader replication, a strategy that ups the ante on fault tolerance and caters to a global user base, reducing latency and the dread of write losses.

The episode wraps with an exploration of the various sharding methods, each with its own set of benefits and hurdles. Whether it's key-based sharding, range-based sharding, directory-based sharding, or geobased sharding we help you navigate these techniques to find the best fit for your specific needs. And as a bonus, we tease what's on the horizon for our tech-savvy listeners: the enthralling world of messaging queues. Be sure to hit subscribe for this and other forthcoming topics that will arm you with the know-how to stay ahead in the tech game. Join us on this journey, and let's conquer the scalability challenge together!

Support the show

Dedicated to the memory of Crystal Rose.
Email me at [email protected]
Join the free Discord
Consider supporting us on Patreon
Special thanks to Aimless Orbiter for the wonderful music.
Please consider giving us a rating on ITunes or wherever you listen to new episodes.