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Tim Freeman

@timf.dev

Working on satellites at Amazon. Into distributed systems, high availability, databases, Rust, Python, to name a few things.

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Latest posts by Tim Freeman @timf.dev

Book cover of "Designing Data-Intensive Applications, 2nd edition". It has a similar wild boar on the cover as the first edition, but it uses O'Reilly's new cover design, and the boar is now slightly colourised.

Book cover of "Designing Data-Intensive Applications, 2nd edition". It has a similar wild boar on the cover as the first edition, but it uses O'Reilly's new cover design, and the boar is now slightly colourised.

The second edition of Designing Data-Intensive Applications, by myself and @chris.blue, is finished and sent off to the printers! Ebooks should be available in the next week, and print books in 3–4 weeks. Sigh of relief. πŸ˜…

(BTW, this is a good opportunity to support your favourite local bookshop!)

18.02.2026 11:09 πŸ‘ 669 πŸ” 140 πŸ’¬ 27 πŸ“Œ 19
Original post on mastodon.jepsen.io

Jepsen and Antithesis worked together to write a glossary for anyone building, testing, and operating distributed systems. It covers the basics of concurrency, consistency models and phenomena, faults, and some testing approaches:

https://antithesis.com/resources/reliability_glossary/ […]

02.12.2025 22:52 πŸ‘ 16 πŸ” 5 πŸ’¬ 0 πŸ“Œ 0
Original post on mastodon.jepsen.io

A new #Jepsen report! We tested early builds of Capela, an unreleased distributed programming environment, and found twenty-two issues, including four language problems, fourteen crashes or non-fatal panics, performance degradation, and three safety issues including lost update […]

07.08.2025 14:44 πŸ‘ 8 πŸ” 3 πŸ’¬ 0 πŸ“Œ 0

I have lots of Thoughts about technology marketing (that led to a lot of the way Rust did things, and was borne out of… previous experiences) but the biggest one is: you gotta define yourself on your own terms rather than in opposition to something else

01.05.2025 15:18 πŸ‘ 143 πŸ” 14 πŸ’¬ 3 πŸ“Œ 8

Nice: CloudFormation Hooks now support Lambda functions.

aws.amazon.com/blogs/devops...

21.11.2024 20:18 πŸ‘ 5 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0

I created a list of Cloud Security folks on here. bsky.app/profile/scot...

18.11.2024 00:57 πŸ‘ 45 πŸ” 9 πŸ’¬ 4 πŸ“Œ 1

If you read ✨one post✨ this year about instrumentation, OTel, logs, tracing, or observability 2.0, make it this one. It's just that fucking good.

It has code samples. It is also a great overview of your options in the o11y 2.0 space, incl vendors, OSS and hybrid.

jeremymorrell.dev/blog/a-pract...

23.10.2024 21:08 πŸ‘ 114 πŸ” 26 πŸ’¬ 2 πŸ“Œ 0
A high volume, highly available cron pattern Β· Peakscale

I'm curious how other people are designing systems that do a lot of scheduling/monitoring work.

What I landed on might be considered heavy handed?

But I'm pretty happy with its development, testing, cost, and HA properties/tradeoffs.

https://www.peakscale.com/external-cron/

05.07.2023 14:55 πŸ‘ 3 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0

yes I’ve stared into the abyss

(contemplating zero caffeine)

04.07.2023 12:36 πŸ‘ 0 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0

the bsky team should start monitoring twitter's infra for outages, so they know when to scale up

01.07.2023 16:06 πŸ‘ 98 πŸ” 13 πŸ’¬ 3 πŸ“Œ 0

it's too early for this image πŸ˜†

30.06.2023 13:06 πŸ‘ 0 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0

OH: when elon and zuck wrestle, do you think they might end up kissing?

30.06.2023 13:06 πŸ‘ 1 πŸ” 0 πŸ’¬ 1 πŸ“Œ 0

I really miss working on a team. With the right people, even the really challenging times can be good.

22.06.2023 14:01 πŸ‘ 1 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0

sardines, kimchi, and natto - all before 7am

22.06.2023 13:58 πŸ‘ 1 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0

Nothing exemplifies a complete failure to understand the point of science like demanding to settle a scientific issue through the medium of emotionally persuasive public shouting

18.06.2023 11:14 πŸ‘ 845 πŸ” 214 πŸ’¬ 20 πŸ“Œ 9

that last part is so true, also applicable to building relationships based on a lie. Not worth it to be liked or loved for something you are not

18.06.2023 11:29 πŸ‘ 1 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0

I'm tired of explaining the difference in classified mishandling between Trump, Biden, Pence, and Clinton. So, I wrote it all down in this post, complete with footnotes. Now I hope to never speak on this again. https://infosec.exchange/@jschuh/110551298514321829

16.06.2023 01:33 πŸ‘ 10 πŸ” 6 πŸ’¬ 1 πŸ“Œ 1

do you like anything in its place?

16.06.2023 18:15 πŸ‘ 0 πŸ” 0 πŸ’¬ 1 πŸ“Œ 0
Inside the Courtroom
At his arraignment, Donald Trump was 20 feet from Jack Smith, the special counsel. But they exchanged not a word.

Inside the Courtroom At his arraignment, Donald Trump was 20 feet from Jack Smith, the special counsel. But they exchanged not a word.

Why is this written like a fanfiction romance?

14.06.2023 00:48 πŸ‘ 243 πŸ” 40 πŸ’¬ 12 πŸ“Œ 17
Reddark An open source website to watch subreddits going dark

Tracking site:

11.06.2023 22:17 πŸ‘ 0 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0
Post image

Reddit blackout is already starting. Subreddits are going private and 403s are coming in from RSS feeds:

11.06.2023 22:14 πŸ‘ 0 πŸ” 0 πŸ’¬ 1 πŸ“Œ 0

My former team at Etsy is hiring! Work in Rust with Tantivy on a cloud-native retrieval system. This one is for a Sr Staff Eng, and I'm told a Sr Eng role is also coming up https://jobs.smartrecruiters.com/Etsy2/743999911916518-senior-staff-software-engineer-retrieval-systems

09.06.2023 00:18 πŸ‘ 1 πŸ” 1 πŸ’¬ 0 πŸ“Œ 0

We have like five air purifiers now :-/

08.06.2023 22:04 πŸ‘ 0 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0

More options for the Twitter diaspora? :-/

"One of Meta’s top executives showed employees a preview of the company’s upcoming Twitter competitor [...] The new standalone app will be based on Instagram and integrate with ActivityPub, the decentralized social media protocol."

08.06.2023 20:51 πŸ‘ 0 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0

When this happened in Seattle, I felt very different after a few days. It was very noticeable. Even if you stay inside, smoke inhalation is terrible for you.

08.06.2023 20:45 πŸ‘ 1 πŸ” 0 πŸ’¬ 1 πŸ“Œ 0

bluesky’s mobile app design aesthetic should be more skeetomorphic

08.06.2023 20:02 πŸ‘ 0 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0

first skeet waiting at a red light #milestone

08.06.2023 19:53 πŸ‘ 0 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0

The wildest thing I’ve seen is a pair of divorced parents who are regularly sending/requesting money from each other for kid expenses

08.06.2023 19:47 πŸ‘ 0 πŸ” 0 πŸ’¬ 1 πŸ“Œ 0

cool, was able to change my handle here to @timf.dev

08.06.2023 00:25 πŸ‘ 0 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0