Ruby

We're back with our first meetup in Singapore for 2026! Come join us for an evening of learning from database experts, and great conversations with the ClickHouse community. **🗓️ AGENDA:** * 6:30 PM: Registration, Dinner & Chitchat * 7:00 PM: Welcome and Introductions * 7:10 PM: **The Journey to Zero-Copy: How chDB Became the Fastest SQL Engine on Pandas DataFrame** by Auxten Wang, Technical Director @ ClickHouse * 7:40 PM: **Powering Bullet's Sub-millisecond Perpetuals Trading Platform** by Tristan Frizza, Co-Founder and CTO @ Sierra Research * 8:10 PM: Q&A & Networking **👉🏼 RSVP to secure your spot!** **Interested in sharing a talk at this meetup or future events? Complete this [CFP form](https://clickhou.se/chmeetup-cfp) and we’ll be in touch.** **_____________________________________** **🎤 Session Details: The Journey to Zero-Copy: How chDB Became the Fastest SQL Engine on Pandas DataFrame** In this talk, Auxten Wang, creator and lead developer of chDB, shares the story of how the world’s fastest OLAP engine was made to fly on Pandas DataFrames, reducing query times from 30 seconds to just 0.5 seconds. He walks through chDB’s evolution from a serialization-bound prototype into a fully zero-copy SQL engine for Pandas, covering how DataFrame and Parquet round-trips were eliminated, how Python GIL limitations were overcome, and how string handling was rethought for parallel performance. The result is true DataFrame in and DataFrame out SQL with ClickHouse speed, delivering up to 200× faster analytics, native JSON support, streaming for data larger than RAM, and a complete zero copy loop with no servers, no setup, and no friction. **Speaker: Auxten Wang, Technical Director @ ClickHouse** Auxten Wang is a Technical Director at ClickHouse with 15 years of experience designing high-performance databases, recommender of systems, and infrastructure across startups and major tech firms. He co-founded CovenantSQL and contributed storage-layer and write-query functionality to a decentralized SQL database with blockchain features, and is an active author/contributor to ClickHouse and low-level projects like jemalloc, Kubernetes, and Memcached. His background includes leading RecSys and infrastructure teams as Principal Engineer at Shopee and director-level roles at 4Paradigm, combining production ML/recsys experience with rigorous systems engineering. Early at Baidu he architected and implemented Gingko—the company’s p2p large-dataset distribution system—writing the majority of its C++ code and applying a Dynamo-inspired design. Based in Singapore, he brings a rare mix of hands-on C/C++ systems work, testing and storage engineering, and product-driven startup leadership. **🎤 Session Details: Powering Bullet's Sub-millisecond Perpetuals Trading Platform** Tristan Frizza, Co-Founder and CTO of Sierra Research, shares their multi-year journey to delivering low latency and near real time trading data, charts, leaderboards, and analytics at scale. This talk explores the evolution from data lakes and complex, painful serving architectures to a streamlined single source of truth powered by ClickHouse Cloud, highlighting the technical lessons learned in building fast, reliable analytics for demanding trading workloads. **Speaker: Tristan Frizza, Co-Founder and CTO @ Sierra Research** Tristan Frizza is the Co-Founder and CTO of Sierra Research, focused on building the financial infrastructure the world deserves. Originally from Australia and now based in Singapore, he has led the development of high-performance trading and consumer systems, including a decentralized trading platform with over 100,000 users and $15B in notional volume. Previously, Tristan worked in machine learning and data science roles at Atlassian, Nearmap, and Lumaway, to name a few, building large-scale ML systems and data infrastructure used by tens of millions of users.

Join us for a groundbreaking session on how **AI Coding Agents** are changing the game for legacy modernization. We aren't just talking about code completion; we are talking about autonomous agents that can refactor, document, and migrate entire modules with precision. ​**🚀 Session: Modernizing Legacy Projects using AI Coding Agents** ​In this deep-dive session, we will explore how to leverage the latest generation of AI agents (like Cursor, Windsurf, Devin, or custom LLM pipelines) to tackle technical debt that would normally take months to resolve. ​**What We Will Cover:** * ​**Automated Refactoring:** How to use agents to identify code smells, untangle spaghetti code, and implement modern design patterns without breaking functionality. * ​**Language & Framework Migration:** Strategies for using AI to translate old syntax (e.g., Java 8 to 21, jQuery to React) while preserving business logic. * ​**Test Generation:** How to generate comprehensive unit and integration tests for legacy code that currently has zero coverage, ensuring a safe modernization path. * ​**Documentation Recovery:** Using AI to reverse-engineer documentation from undocumented legacy systems. ​**Why Attend?** Legacy modernization doesn't have to be a painful, multi-year slog. Come see how AI agents can act as your force multiplier, turning a daunting migration into a manageable, automated workflow.

**LEARN MANDARIN WITH US** **和我们一起学华语/普通话** Come and join us every Saturday afternoon and learn some useful Mandarin from proficient speakers in a friendly and casual atmosphere. Besides learning the language, you will also get to make new friends from all around the world. Whether you are a beginner, intermediate and advanced learner, we welcome you. The meetup starts at 4 pm. We will try our best to arrange seating at this time so that each group has expert Mandarin speakers. If you come later than 4.10 pm we cannot guarantee ideal seating. Seating priorities will be given to those who signed up. **欢迎会说华语/普通话的朋友** 我们非常欢迎会说华语/普通话的朋友来参加我们这个华语/普通话练习小组，帮助来自世界各地的朋友学习华语/普通话。 *** GETTING THERE Take Downtown (blue) Line or Circle (yellow) Line to Promenade MRT. Take Exit C at Promenade MRT, and go up to level 3. LOCATING US INSIDE THE FOOD COURT Look for a round tables section near the wall of the food court away from the stalls. You can drop the Event Host a message if you are lost. NO COMMERCIAL ACTIVITIES We welcome anyone who is keen to learn a language or help others learn the language. However, this is NOT the platform for individuals who have other intentions, such as recruiting members for their business or organization or selling products or services. We will not hesitate to ask such individuals to stop attending our meetups.

Come out to Improving for our monthly iOS and Mac meetings. This Month's Presentation: Nothing yet. (You should volunteer). What is Cocoaheads (http://cocoaheads.org/)? CocoaHeads is a group devoted to discussion of Apple Computer's Cocoa Framework for programming on MacOS X and iOS (including the iPhone, iPad and Apple Watch). During monthly meetings, members present on their projects and offer tutorials on various programming topics. What is BuckeyeCocoa (http://buckeyecocoa.org/)? BuckeyeCocoa is a group of Objective-C/Swift developers/enthusiasts. We host monthly Cocoaheads and near-weekly NSCoder meetings in Columbus, Ohio. The meetings are free to attend. Presentations! Presenters welcome! We are always in need of people willing to present material. Any Swift and/or Objective-C related topic is welcome. Times can be 5 minutes (i.e. lightning talks) to a maximum of 2 hours. Interested? Contact info is on the BuckeyeCocoa website. To volunteer for a presentation contact us at @BuckeyeCocoa on Twitter. Follow us on Twitter! @BuckeyeCocoa (https://twitter.com/#!/Buckeyecocoa/) For more information: http://buckeyecocoa.org/

Bring your work or your hobby, hang out, and code with us. Follow @buckeyecocoa for more information.

**New Dojo Location!** **Draft Day Columbus** 1130 Dublin Road Columbus, OH 43215 We're going to try a new dojo location for a few weeks and see how it works Dojos are informal Python group study sessions where everyone interested in Python gathers to learn about Python, help others with Python, or just hang out. Everyone is welcome from Python beginners to experts. Bringing a laptop is encouraged (we'll have extension cords and power strips). If there's something you want to learn leave a comment on this invite so we can plan ahead. We're looking for topic suggestions and people interested in presenting at our monthly meetings. To this end we've set up a survey form at [https://docs.google.com/forms/d/15eBKF1nQQ2XS5gzD4rvhVRHMBEj7lJtHuA9wXupS3Uc](https://docs.google.com/forms/d/15eBKF1nQQ2XS5gzD4rvhVRHMBEj7lJtHuA9wXupS3Uc)

Our monthly PHP meetup. A virtual shindig courtesy of Zoom. Check back here for the details around 6:15 pm

**GIS and Software Programming** (with a focus on Python and JavaScript) by **[Gary Yu](https://www.linkedin.com/in/gary-yu-analyst/)** * GIS Overview * Programming Overview * GIS History * History of Programming * A Cluster of GIS Software * A Tale of Two Programming Languages (Python and JavaScript) * How to integrate GIS Software in Python * How to integrate GIS Software in JS ***Bring your laptop and expect to write some (non-AI generated) code!*** *(title subject to change)* Food and drinks will be available. **LOCATION:** 6515 Longshore Loop, Suite 300, Dublin, OH 43017 **FREE PARKING:** 6725 Longshore Street, Dublin, OH 43017

## Learn Infrastructure-as-Code (the FUN Way) — Through Minecraft 🎮☁️ **Joint Meetup: Azure CBUS × Columbus HashiCorp User Group** What if learning Terraform and Infrastructure-as-Code didn’t feel like a whitepaper… but more like a game? Join us for a joint Azure CBUS and Columbus HashiCorp User Group meetup where **Mark Tinderholt** \(Principal Architect\, Microsoft Azure \| HashiCorp Ambassador \| “The Azure Terraformer”\) shows how **Minecraft** can be used as a surprisingly powerful way to understand real-world Infrastructure-as-Code concepts. In this session, Mark will demonstrate how Terraform and Azure can be used to provision, configure, and manage Minecraft servers—while teaching the same patterns you’d use for production cloud infrastructure. ### What we’ll cover * Infrastructure-as-Code fundamentals using **Terraform** * Provisioning real infrastructure on **Azure** * Applying **IaC best practices** (immutability, repeatability, versioning) * How playful environments like Minecraft make complex concepts *click* * Why learning through experimentation beats click-ops every time ### Who should attend * Developers, platform engineers, and cloud engineers * Terraform users (new or experienced) * Anyone curious about Infrastructure-as-Code but tired of boring examples * Minecraft fans who want to see it used in a totally unexpected way No prior Minecraft experience required—just curiosity and a willingness to learn infrastructure the fun way. Come for the blocks, stay for the Terraform. 🧱➡️📐 Want to be a speaker? submit your talk to our Call for Presenters!!! https://sessionize.com/cbus-hug-2026/

## Details \#\# Learn Infrastructure\-as\-Code \(the FUN Way\) — Through Minecraft 🎮☁️ **Joint Meetup: DevOps Columbus - Azure CBUS - Columbus HashiCorp User Group** What if learning Terraform and Infrastructure-as-Code didn’t feel like a whitepaper… but more like a game? Join us for a joint DevOps Columbus, Azure CBUS and Columbus HashiCorp User Group meetup where **Mark Tinderholt** \(Principal Architect\, Microsoft Azure \| HashiCorp Ambassador \| “The Azure Terraformer”\) shows how **Minecraft** can be used as a surprisingly powerful way to understand real-world Infrastructure-as-Code concepts. In this session, Mark will demonstrate how Terraform and Azure can be used to provision, configure, and manage Minecraft servers—while teaching the same patterns you’d use for production cloud infrastructure. \#\#\# What we’ll cover * Infrastructure-as-Code fundamentals using **Terraform** * Provisioning real infrastructure on **Azure** * Applying **IaC best practices** (immutability, repeatability, versioning) * How playful environments like Minecraft make complex concepts *click* * Why learning through experimentation beats click-ops every time \#\#\# Who should attend * Developers, platform engineers, and cloud engineers * Terraform users (new or experienced) * Anyone curious about Infrastructure-as-Code but tired of boring examples * Minecraft fans who want to see it used in a totally unexpected way No prior Minecraft experience required—just curiosity and a willingness to learn infrastructure the fun way. Come for the blocks, stay for the Terraform. 🧱➡️📐