UB Hacking 2024

The chapter 9 of the Designing Data Intensive Applications (DDIA) book has the following 4 sections (which contain a total of 10 subsections). Consistency guaranteesLinearizabilityOrdering guaranteesDistributed transactions and consensusTMI (Too much info)The chapter tries to do too much. Almost an entire semester of distributed systems content...

This paper appeared in Sigmod'23.What?Auto-WLM is a machine learning based *automatic workload manager* currently used in production in Amazon Redshift.I thought this would be a machine learning paper, you know deep learning and stuff. But this paper turned out to be a practical/applied data systems paper. At its core, this paper is about...

This is a long chapter. It touches on so many things. Here is the table of contents.Faults and partial failuresUnreliable networksdetecting faultstimeouts and unbounded delayssync vs async networksUnreliable clocksmonotonic vs time-of-day clocksclock sync and accuracyrelying on sync clocksprocess pausesKnowledge truth and liestruth defined by...

We are continuing from the first part of our Chapter 7 review. Serializable isolation ensures that the final result of concurrent transactions is equivalent to if they had been run one at a time, without any concurrency. This eliminates any concurrency anomalies, since it ensures the transactions would behave as they would in a sequential...

Chapter 7 of the Designing Data Intensive Applications (DDIA) book discusses transactions, yay! Transactions in database systems group multiple operations into a logical unit, a box of operations if you will. They simplify error handling and help manage concurrency issues. See Gray-Reuters book introduction and fault-tolerance sections for the...