Anthony Accomazzo

Anthony Accomazzo

BY Anthony Accomazzo
7 min read
We fixed our documentation with the Diátaxis framework

Diátaxis recently made the front page of HN. I mentioned in a comment that we applied the framework to Sequin a couple weeks ago and were very happy with it. Some folks asked me to expand on my comment, so I'm doing so here: The engineer's...

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BY Anthony Accomazzo
8 min read
Keyset Cursors, Not Offsets, for Postgres Pagination

We're building Sequin, a Postgres CDC tool to streams and queues like Kafka, SQS, HTTP endpoints, and more. Efficient, correct pagination is paramount for our backfill process, so we use keyset cursors extensively. You've probably heard about the limitations of offset/limit in Postgres. There are...

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BY Anthony Accomazzo
10 min read
Time-based retention strategies in Postgres

Whether you're managing event logs, audit trails, or time-series data, there comes a point when you need to start pruning old records. Can Postgres do it? And what tools are at your disposal? Explore pg_cron, pg_partman, and DIY....

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BY Anthony Accomazzo
7 min read
Request-reply in Postgres

We're Sequin, a Postgres CDC tool to streams and queues like Kafka, SQS, HTTP endpoints, and more. Like any Postgres maxi, we tend to find ourselves down a Postgres rabbit hole a couple times per month. This is one of those times :) Who doesn't like to...

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BY Anthony Accomazzo
4 min read
No such thing as exactly-once delivery

The differences between at-most-once, at-least-once, and exactly-once delivery in messaging systems....

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BY Anthony Accomazzo
7 min read
All the ways to react to changes in Supabase

We're Sequin, a Postgres CDC tool to streams and queues like Kafka, SQS, HTTP endpoints, and more. A lot of our users use Supabase, so we've explored all the ways they've done event-driven workflows before Sequin. Supabase makes it easy for your frontend to...

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BY Anthony Accomazzo
10 min read
How we build forms in LiveView + LiveSvelte

We're Sequin, a Postgres CDC tool to streams and queues like Kafka, SQS, HTTP endpoints, and more. We have a web console for managing tables and streams, and that console is built with LiveView + LiveSvelte. We wrote previously about how much we enjoyed using LiveView with LiveSvelte. Since...

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BY Anthony Accomazzo
24 min read
Build your own SQS or Kafka with Postgres

We're Sequin, a Postgres CDC tool to streams and queues like Kafka, SQS, HTTP endpoints, and more. We think Sequin's cool, but you don't need to adopt the project to get started with streaming in Postgres. In fact, you can turn Postgres into a...

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BY Anthony Accomazzo
13 min read
Postgres sequences can commit out-of-order

We're Sequin, a Postgres CDC tool to streams and queues like Kafka, SQS, HTTP endpoints, and more. Stable, sequential ordering is a very useful thing to have when building a streaming system. But Postgres' behavior here can be surprising! We go down the rabbit hole below. An...

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BY Anthony Accomazzo
12 min read
LiveView is best with Svelte

Phoenix's LiveView is powerful. But it felt like it was missing something. Adding Svelte not only filled a big gap – it introduced us to an entirely new way to develop web apps....

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BY Anthony Accomazzo
9 min read
All the ways to capture changes in Postgres

Working with data at rest is where Postgres shines. But what about when you need data in motion? What about when you need to trigger a workflow based on changes to a table? Fortunately, Postgres comes with a lot of options to make this happen....

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BY Anthony Accomazzo
10 min read
We used Elixir's Observer to hunt down bottlenecks

How we used Elixir's Observer to chase down and fix some puzzling runtime issues....

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BY Anthony Accomazzo
6 min read
Give me /events, not webhooks

Webhooks come with some challenges. We prefer polling an /events endpoint instead when possible....

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