Simo Roikonen

Complex Domains ↣ Evolvable Backends ↣ Low Latency at Any Scale
#ScalableModeling

[Simo Roikonen @simoroikonen]

In the future you can find my posts from Bluesky.
https://t.co/UdDcPYANkw

[Simo Roikonen @simoroikonen]

"It's developer (mis)understanding that gets released, not the experts' knowledge."
Alberto Brandolini

Understanding the domain is crucial for an accurate model. Event-centrism aids discovery, and event immutability is key to #ScalableModeling. #EventStorming @avanscoperta

[Simo Roikonen @simoroikonen]

Scalability Challenge 3/3: Time Travel ⏱️
In #DistributedSystems, data often appears at different times due to inevitable consistency delays. To manage this ‘time travel’ effect and keep system integrity, versioning and clear cause-effect flows are essential. #ScalableModeling

[Akka @akka_io_]

In this webinar, our partner #Twoday, will introduce a formula that combines best practices into a high-velocity development method.

Don't miss the chance to get insights into the latest features of Akka!
📆 Nov 26th | 2 PM EET

🔗 https://t.co/Po0gxGIo8M
#Akka3 #StayResponsive

[Simo Roikonen @simoroikonen]

Scalability challenge 2/3: Tailoring Consistency ✂️ Strong consistency is the wrong default. Tailoring consistency helps optimize performance without compromising integrity. #DistributedSystems #Scalability #EventSourcing #ScalableModeling

[Simo Roikonen @simoroikonen]

Scalability challenge 1/3: Deduplication 👯‍♂️ Exactly-once delivery is unachievable in distributed systems, so we rely on effectively-once or idempotent processing to ensure duplicate messages don’t affect outcomes. #DistributedSystems #Scalability #ScalableModeling

[Simo Roikonen @simoroikonen]

Querying the command model in #CQRS is often debated. While it’s not designed for querying, limited reads can be useful — e.g. in clustered, in-memory models (Akka-style) for quick state access post-update. Still, querying should be rare and justified. #ScalableModeling

[Simo Roikonen @simoroikonen]

The three dimensions to scalability - AKF Scale Cube:

1️⃣ Decomposition: Scale by splitting different things
2️⃣ Duplication: Scale by cloning data or instances.
3️⃣ Partitioning: Scale by splitting similar things into many partitions

#ScalableModeling helps you to reach them.

[Simo Roikonen @simoroikonen]

Read more from: https://t.co/86dVPkE6u9

[Simo Roikonen @simoroikonen]

#ScalableModeling
𝗖𝗼𝗺𝗺𝗮𝗻𝗱 Initiate action
𝗖𝗼𝗺𝗺𝗮𝗻𝗱 𝗠𝗼𝗱𝗲𝗹 Validate commands
𝗣𝗿𝗶𝘃𝗮𝘁𝗲 𝗘𝘃𝗲𝗻𝘁 Capture changes
𝗤𝘂𝗲𝗿𝘆 𝗠𝗼𝗱𝗲𝗹 Optimize data retrieval
𝗤𝘂𝗲𝗿𝘆 Request data
𝗣𝗼𝗹𝗶𝗰𝘆 Define business rules
𝗣𝘂𝗯𝗹𝗶𝗰 𝗘𝘃𝗲𝗻𝘁 Announce changes

[Simo Roikonen @simoroikonen]

𝗦𝗼𝗳𝘁𝘄𝗮𝗿𝗲 𝗶𝘀 𝘂𝗹𝘁𝗶𝗺𝗮𝘁𝗲𝗹𝘆 𝗮 𝗺𝗼𝗱𝗲𝗹 — an invisible yet powerful solution to real challenges. In software engineering, the key steps are:
𝗪𝗛𝗬 ↔ 𝗪𝗛𝗔𝗧: Conceptual model design↔𝗛𝗢𝗪
#ScalableModeling bridges WHY to HOW, with 𝗳𝗼𝗰𝘂𝘀 𝗼𝗻 𝗪𝗛𝗔𝗧.

[Simo Roikonen @simoroikonen]

“Doing the 𝘄𝗿𝗼𝗻𝗴 𝘁𝗵𝗶𝗻𝗴 𝗿𝗶𝗴𝗵𝘁 is not nearly as good as doing the 𝗿𝗶𝗴𝗵𝘁 𝘁𝗵𝗶𝗻𝗴 𝘄𝗿𝗼𝗻𝗴.” 𝘙𝘶𝘴𝘴𝘦𝘭𝘭 𝘓. 𝘈𝘤𝘬𝘰𝘧𝘧
In SW engineering, we often focus 𝗛𝗢𝗪 rather than 𝗪𝗛𝗬+𝗪𝗛𝗔𝗧. #ScalableModeling ➡ WHY to HOW but 𝘀𝘁𝗿𝗲𝘀𝘀 𝗼𝗻 𝗪𝗛𝗔𝗧.

[Simo Roikonen @simoroikonen]

After 10 years in software #Scalability & #DistributedSystems, I'm celebrating by gathering what I’ve learned into a webpage on a modeling technique for scalable systems — called #ScalableModeling. Hope it helps! https://t.co/aQbDvTv0EQ
#CQRS #EventSourcing #DDD #EventStorming

[Colin Breck @breckcs]

Blogged: Predicting the Future of Distributed Systems
https://t.co/qwEYZ2SMkd

[Simo Roikonen @simoroikonen]

Lucky me! *<:o) https://t.co/U9aU7PJCXx

[Lunatech @LunatechLabs]

...and our winners was @simoroikonen and @pbvie at the final @scaladays raffle! Berlin was the perfect place for this 2018 Europe edition. The Lunateam thanks all the attendees/speakers/organisers for this wonderful 2018 edition. #scaladays2018 #lightbend #heisegruppe #berlin 🏢

[Simo Roikonen @simoroikonen]

@LunatechLabs @pbvie @scaladays Thank you! :)

[Simo Roikonen @simoroikonen]

Hype Driven Development #hdd https://t.co/9VnI3440Ea

[Simo Roikonen @simoroikonen]

About #antisrömsö of #engineering in #distributedsystems -> #failfast #resilient #reactive https://t.co/To0DJqioJl

[Simo Roikonen @simoroikonen]

Solve the Right Problem by @JarimattiV #mvp https://t.co/NaSd6A3FhM

[Simo Roikonen @simoroikonen]

No Free Lunch with Distributed Systems https://t.co/r6RBTcdN9K