FS23

The admin part gives an overview over this lecture and presents the challenge task for this course (Slides: FS23-DSy-01-admin.pdf). The second video (news) discusses the regulators and Binance, shows the CDN comparison of Fastly and AWS CloudFront from Backblaze, reminds of important Linux commands, shows what can go wrong with Vercel, if you have an infinity loop, and gives an update on Do Kwon (Slides: FS23-DSy-01-news.pdf). The third video gives a motivation why distributed systems are necessary (Slides: FS23-DSy-01-intro.pdf). [118min]

The admin part is about group forming (Slides: FS23-DSy-02-admin.pdf). This video (news) discusses the server failures of the city of Wuppertal, gives an update on the Let's Encrypt Stats page, shows how a million of web sockets can be kept open on a consumer grade laptop from 2013, shows an infinity glitch and an Interview with Guilherme Sperb Machado, then talks about broken undersea cables, why latency matters, and gives an update on Do Kwon and the Swiss bank (Slides: FS23-DSy-02-news.pdf). The third video discusses definitions of distributed systems and tries to categorize them (Slides: FS23-DSy-02-categorization.pdf). [70min]

The admin part is about group forming and lecture content (Slides: FS23-DSy-03-admin.pdf). This video (news) discusses FTX and Binance, talks about expensive mistakes, reports on the attack on Quad9 and discusses self-hosting solutions (Slides: FS23-DSy-03-news.pdf). The third video the difference between a monorepo and polyrepo (Slides: FS23-DSy-03-repo.pdf). The fourth video starts with the protocols (Slides: FS23-DSy-03-protocols1.pdf) [83min]

The video (news) explains whats happening currently with the de-pegging of USDC and why it happened. (Slides: FS23-DSy-04-news.pdf). [10min]

This video (news) follows up on the USDC peg, talks about the Docker Hub issue, talks about the fly.io outage, and that Instagram is disabling Its NFT features (Slides: FS23-DSy-04-news2.pdf). The third video shows practical examples with HTTP/3 and shows how HTTP/3 can be used in the challenge task (Slides: FS23-DSy-04-http3.pdf). The forth video finishes with the transport protocols (Slides: FS23-DSy-04-protocols2.pdf). [102min]

The admin part is about group forming and lecture content (Slides: FS23-DSy-05-admin.pdf). This video (news) reminds you that access and refresh tokens should be kept secure, an update on Do Kwon, how to de-cloud your apps, and mentions that the SEC is threatening Coinbase for their unregistered staking services. (Slides: FS23-DSy-05-news.pdf). The third video shows existing authentication mechanisms, and highlights JWT, an authentication mechanisms that can be used for stateless services. (Slides: FS23-DSy-05-auth.pdf). The fourth video explains different web architectures that could be used for the challenge task. (Slides: FS23-DSy-05-arch.pdf) [111min]

The admin part is about lecture content and the first challenge task milestone (Slides: FS23-DSy-06-admin.pdf). This video (news) talks about Trump Digital Trading Cards, about file system limits, ChatGPT, about Bittrex shutting down US operations, and an article to avoid HTTP/3 for the moment (Slides: FS23-DSy-06-news.pdf). The third video explains load balancing and shows load balancing with Traefik, Caddy, and Nginx (Slides: FS23-DSy-06-load.pdf). [88min]

This video (news) gives an update on Googles 5m file limit, talks about ERC-4804, an URI adaption to Ethereum, a rant about npm dependencies and the Ethereum Shanghai update. (Slides: FS23-DSy-06-news2.pdf). [7min]

The admin part is about lecture content and the first challenge task milestone (Slides: FS23-DSy-07-admin.pdf). This video (news) mentions the faster boot time of Podman, talks about how the SEC are defining DeFi, and gives and update on Tornado Cash from an EFF's perspective (Slides: FS23-DSy-07-news.pdf). The third video dives into VMs and containers (Slides: FS23-DSy-07-container.pdf). [91min]

The admin part is about lecture content, the first challenge task milestone, and the reminder of the talk "From digital crimes to court in the UK" with Philip Anderson (Slides: FS23-DSy-08-admin.pdf). The video (news) shows an intro video to VMs and containers by IBM, talks about the MiCA regulation, about KDF and crypto detectives, and about local-first software (Slides: FS23-DSy-08-news.pdf). The third video gives a high-level overview over deployments (Slides: FS23-DSy-08-deployment.pdf). [50min]

The admin part is about lecture content (Slides: FS23-DSy-09-admin.pdf). This video (news) reviews articles on distributed systems and blockchain topics. The first article illustrates various load balancing algorithms, such as round robin, weighted round robin, and least connections. The second article delves into self-hosting emails and mechanisms like SPF, DKIM, DMARC, and DANE. The third article compares REST and gRPC protocols for API development. The fourth article presents a map of Starlink, Oneweb, and GPS satellites, discussing their orbits and latencies. The final article evaluates Google Authenticator's synchronization feature and its security risks (Slides: FS23-DSy-09-news.pdf). The third video talks about the distributed application Mastodon (Slides: FS23-DSy-09-dist-app-mastodon.pdf). The fourth talks about the distributed application Tor (Slides: FS23-DSy-09-dist-app-tor.pdf). [103min]

No admin video for lecture 10. In this episode of Disputed Systems and Blockchain in the News, the use of Time-based One-Time Passwords (TOTP) for authentication, highlighting two open source TOTP applications: Aegis Authenticator, and FreeOTP+ is discussed. Next, an article by Amazon's CTO discussing the importance of choosing between microservices and monolithic architectures based on specific use cases, as there is no one-size-fits-all solution is mentioned. Lastly, the European banking sector's recent phenomenon of "bank walk," a slow but notable outflow of customer cash is mentioned (Slides: FS23-DSy-10-news.pdf). The second video introduces Bitcoin and its mechanisms (Slides: FS23-DSy-10-bitcoin.pdf). [93min]

The admin part is about lecture content (Slides: FS23-DSy-11-admin.pdf). In this news episode, Thomas Bocek discusses a bit flip issue in a Merkle tree from a Chromium mailing list that impacted a certificate transparency log, suggesting the use of ECC RAM for servers. He introduces a site explaining SSL/TLS handshakes and shares a report indicating that nearly half of all internet traffic comes from bots. Finally, he mentions Sam Altman's cryptocurrency project, Worldcoin, designed to distribute cryptocurrency globally for free, and its potential implications for the future (Slides: FS23-DSy-11-news.pdf). The third video introduces Ethereum and smart contracts (Slides: FS23-DSy-11-ethereum.pdf). [74min]

The admin part is about lecture content and the challenge task handin and deadline (Slides: FS23-DSy-12-admin.pdf). In this news episode, Thomas Bocek discusses various developments in the realm of distributed systems and blockchain: cryptocurrency wallet provider Ledger introduced a seed phrase recovery service, raising security concerns due to their past data breach. Discord migrated its data management from Cassandra to ScyllaDB, addressing performance issues, reducing the number of nodes, and improving latency and resilience. A recent post argued that due to advancements in modern hardware, scaling up could be more cost-effective, reliable, and simpler than scaling out strategies. Lastly, Airbnb improved their page performance by implementing HTTP streaming, sending data in chunks as soon as they're ready and reducing the first contentful paint time. (Slides: FS23-DSy-12-news.pdf). [20min]

The admin part is about the challenge task handin and deadline (Slides: FS23-DSy-13-admin.pdf). In this news episode, Thomas Bocek discusses articles related to distributed systems and blockchain. The first article compares memory usage for 1 million concurrent tasks in different programming languages. The second article highlights challenges with large language models, including limited context windows and slow API calls. The need for distributed systems and horizontal scaling is emphasized. The last article introduces Podman, an alternative to Docker, and its new GUI version. (Slides: FS23-DSy-13-news.pdf). [11min]

The first video is the exam preparation (Slides: FS22-DSy-14-exam.pdf). In the news video, Thomas Bocek concludes a lecture series on distributed systems and blockchain. The highlight of this conclusion is the announcement of the challenge task winner, wherein students were required to build a fully scalable distributed system capable of serving HTTP/3 requests. The students presented many different ideas, which not only reflected the depth of student creativity and technical knowledge but also provided interesting insights into their technology preferences. (Slides: FS23-DSy-14-ct.pdf). [44min]