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Azure Cosmos DB: Microsoft's Cloud-Born Globally Distributed Database
It has been almost 9 months since I started my sabbatical work with the Microsoft Azure Cosmos DB team. I knew what I signed up for then...
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Common Mistakes and Missed Optimization Opportunities in SQL
Made by Developers and Non-Developers
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Shenandoah GC in production: experience report
Update: I've made several edits to the post since Aleksey Shipilëv was kind enough to suggest many corrections and improvements.If you closely follow JVM development scene, you've probably noticed ...
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Datamining Bandersnatch
You may have heard about Bandersnatch , an interactive film released on Netflix as part of the Black Mirror series. I’ve heard about it when it was released, but didn’t get around to watch it until recently, and I was surprised at how deep and thorough the implementation is. The film consists of:
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Book Review: Designing Data-Intensive Applications
What a great book Designing Data-Intensive Applications is! It covers databases and distributed systems in clear language, great detail and without any fluff. I particularly like that the author Ma…
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FastSpark: A New Fast Native Implementation of Spark from Scratch
TLDR: Here is the code to explore.
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Data Still Dominates
I’m a huge proponent of designing your code around the data, rather than the other way around, and I think it’s one of the reasons git has been fairly successful… I will, in fact, claim that the difference between a bad programmer and a good one is whether he considers his code or his data structures more important…
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PostgreSQL 11 Reestablishes Window Functions Leadership
PostgreSQL 11 offers the best OVER clause support among its competitors, true procedures, and improvements in FETCH FIRST and XML.
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Databases always have a schema (2018)
You're probably reading this page because you've attempted to access some part of my blog (Wandering Thoughts) or CSpace , the wiki thing it's part of. Unfortunately you're using a browser version that my anti-crawler precautions consider suspicious, most often because it's too old (most often this applies to versions…
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Wikipedia pageviews this year for each line of ‘We Didn't Start the Fire’
The modern relevancy of every line of 'We Didn't Start the Fire'
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Data Science Interview Study Guide
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Notes on the Amazon Aurora Paper
This is my notes on the paper: Amazon Aurora: Design Considerations for High Throughput Cloud-Native Relational Databases.
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How Bad Is Your Colormap? (2014)
What this function does is to give you a lumninance-correct grayscale version of any matplotlib colormap. I've found this useful for quickly checking how my plots might appear if printed in black and white, but I think it's probably even more useful for stoking the flame of the internet's general rant against jet .
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What’s Wrong with Bayes
My problem is not just with the methods—although I do have problems with the method—but also with the ideology.
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Introduction to LSM Trees: May the Logs Be with You
LSM Trees overview This post is a part of a newsletter that I run: “Scamming The Coding Interview“, which is geared towards helping people ACE their coding interviews. We send a coding qu…
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Designing far memory data structures: think outside the box
Designing far memory data structures: think outside the box Aguilera et al., HotOS’19 Last time out we looked at some of the trade-offs between RInKs and LInKs, and the advantages of local in…
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Using machine learning to choose compression algorithms
30% less disk required compared to using the single best strategy
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Sorting in Japanese – An Unsolved Problem (2011)
Sorting Japanese is not only difficult—it’s an unsolved problem. This seems hard to believe if you are not familiar with the complexities of processing Japanese digitally. But what is trivially easy in English is impossible in Japanese, even with the amount of computer power we have available today.
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Building a Relational Database Using Kafka
In a previous post, I showed how Kafka can be used as the persistent storage for an embedded key-value store, called KCache. Once you have a key-value store, it can be used as the basis for other m…
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Challenges in Implementing a Full-Text-Search Engine
While Full-text-search is famous for search through documents at a faster rate, there are other interesting ways in which these systems handle scale, synonyms, abbreviations, misspellings etc., we will
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Investigating the 900GB “Collection #1-5” password leaks with R
This post shows how to process gigabytes of unstructured data with the Spark framework and using the R language.
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Applied Monotonicity: A Brief History of CRDTs in Riak
RiakAround 2013, Riak was at the forefront of Conflict-Free Replicated Data Type (CRDT) development with the engineers at Basho Technologies working hard to integrate efficient, usable CRDTs from t...
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PostgreSQL DBaaS vendor comparison and calculator
This is a comparison of PostgreSQL DBaaS providers with an interactive calculator.