A brief diversion from my journey learning Apache Flink to document an interesting zsh oddity that briefly tripped me up:

cd: string not in pwd: flink-1.17.1

My journey with Apache Flink begins with an overview of what Flink actually is.

What better place to start than the Apache Flink website itself:

Apache Flink is a framework and distributed processing engine for stateful computations over unbounded and bounded data streams. Flink has been designed to run in all common cluster environments, perform computations at in-memory speed and at any scale.

Like a fortunate child on Christmas Day, I’ve got a brand new toy! A brand new—to me—open-source technology to unwrap, learn, and perhaps even aspire to master elements of within.

I joined Decodable two weeks ago, and since Decodable is built on top of Apache Flink it seems like a great time to learn it. After six years learning Apache Kafka and hearing about this “Flink” thing but—for better or worse—never investigating it, I now have the perfect opportunity to do so.

This week I joined Decodable. I’m grateful to my former colleagues at Treeverse for allowing me to join them on the journey with lakeFS - but something about the streaming world was too strong to resist 😁.

Writing is one of the most powerful forms of communication, and it’s useful in a multitude of roles and contexts. As a blog-writing, documentation-authoring, twitter-shitposting DevEx engineer I spend a lot of my time writing. Recently, someone paid me a very nice compliment about a blog I’d written and asked how they could learn to write like me and what resources I’d recommend.

Never one to miss a chance to write and share something, here’s my response to this :)

This was originally titled more broadly “What Does A DevEx Engineer Do”, but that made it into a far too tedious and long-winding etymological exploration of the discipline. Instead, I’m going to tell you what this particular instantiation of the entity does 😄

Wordpress still, to an extent, rules the blogging world. Its longevity is testament to…something about it ;) However, it’s not my favourite platform in which to write a blog by a long way. It doesn’t support Markdown to the extent that I want. Yes, I’ve tried the plugins; no, they didn’t do what I needed.

I like to write all my content in a structured format - ideally Asciidoc, but I’ll settle for Markdown too. Here’s how I stayed [almost] sane whilst composing a blog in Markdown, reviewing it in Google Docs, and then publishing it in Wordpress in a non-lossy way.

One of the most important ways that a project can help its developers is providing them good documentation. Actually, scratch that. Great documentation.

No great insights in this post, just something for folk who Google this error after me and don’t want to waste three hours chasing their tails… 😄

Here’s a neat little trick you can use with DuckDB to convert a CSV file into a Parquet file:

COPY (SELECT *
	    FROM read_csv('~/data/source.csv',AUTO_DETECT=TRUE))
  TO '~/data/target.parquet' (FORMAT 'PARQUET', CODEC 'ZSTD');