Andrey Satarin

Staff SRE @Google. Distributed systems / databases / reliability / correctness. Views my own. Retweet / like is not an endorsement.

[Andrey Satarin @asatarin]

For quite some time I've been putting together a list of resources on testing distributed systems

https://t.co/J1orsmPCXs

[Andrey Satarin @asatarin]

@norootcause I’ll settle if web UIs have some decent selection behaviour. Often one wrong move changes selection drastically

[Andrey Satarin @asatarin]

@shipilev AIlien. In datacenter no one can hear you scream.

[Andrey Satarin @asatarin]

Great recent find “Epic: The Musical”., based on The Odyssey.

Gods, monsters, magic, love, death, betrayal, revenge, drama. It has It all. **So quotable**.
https://t.co/AMp2virOZ9

[Andrey Satarin @asatarin]

@relizarov For me, Demerzel / Empire story continues to be more interesting since Season 2. And only partially because it's not spoiled by the original book trilogy.

[Daniel Lemire @lemire]

Moore’s law still applies in the sense that the number of transistors in our processors increases exponentially.

What broke around 2005 is Dennard scaling. Our clock frequencies are no longer increasing. But you don’t want to buy a processor from 2005: it is going to be much slower.

Bandwidth and storage are increasing all around.

Our compute throughput is not stagnating. Don’t let anyone tell you otherwise.

[Andrey Satarin @asatarin]

@tagir_valeev Oldie but goodie. Старый ютуб, такого больше не выпускают.

[Andrey Satarin @asatarin]

@tagir_valeev Rolling in the Higgs. Но весь A Capella Science очень крутой

https://t.co/WXdZmTYgz8

[TigerBeetle @TigerBeetleDB]

Kyle Kingsbury Jepsen’ed TigerBeetle

https://t.co/tlKgvLnMwf

[Andrey Satarin @asatarin]

@eatonphil Most certainly, since clients are expected to retry as well.

The trick is to make it invisible to test authors.

[Andrey Satarin @asatarin]

@nikitabase @databricks @neondatabase Congratulations to you and the team. Excited to see what comes out of this.

[James Cowling @jamesacowling]

I designed Dropbox's storage system and modeled its durability. Durability numbers (11 9's etc) are meaningless because competent providers don't lose data because of disk failures, they lose data because of bugs and operator error.

Yes S3 has lost data. No it wasn't because some disks failed.

If you're building your own infrastructure you should heavily invest in release process and validation testing (link in reply). You're not going to do a better job than a major cloud provider though.

The best thing you can do for your own durability is to choose a competent provider and then ensure you don't accidentally delete or corrupt own data on it:

1. Ideally never mutate an object in S3, add a new version instead.
2. Never live-delete any data. Mark it for deletion and then use a lifecycle policy to clean it up after a week.

This way you have time to react to a bug in your own stack.

[Andrey Satarin @asatarin]

@jamesacowling @eatonphil The code I can use internally without talking to a company lawyer.

[Andrey Satarin @asatarin]

@eatonphil https://t.co/DOzNoUyru0

[Pierre Zemb @PierreZ]

I just published a new blogpost "What if we embraced simulation-driven development? 🤔"

https://t.co/8YuyJxr5eJ

[Andrey Satarin @asatarin]

@eatonphil https://t.co/SprzfkoOsY

[Pierre Zemb @PierreZ]

New blogpost published! "So, You Want to Learn More About Deterministic Simulation Testing?"
https://t.co/kZRBtIbkF8

[Distributed Bytes @DistribSystems]

Testing Distributed Systems
https://t.co/559FFEn16Z

[Andrey Satarin @asatarin]

@dbg_nsk Лучи поддержки. Конференции — это тяжело.

[Andrey Satarin @asatarin]

@nearyd @danluu The attending was just being lazy. I'm sure conference website had your bio with socials and they could have satisfied their curiosity in more depth and less time when you ever could in your introduction.

[Andrey Satarin @asatarin]

@eatonphil You might enjoy #bardcore version of Pink Pony Club as well

https://t.co/64VRcPXDW5

[Andrey Satarin @asatarin]

@wangbin579 Depends on the workload and read committed implementation.

For vanilla MySQL AFAIR single statement query will be about the same due to implementation details.

[Andrey Satarin @asatarin]

@jorandirkgreef > test this?

Shots fired