Hadoop

**🏁 Race, Code, Repeat – Post-Australia GP Data Jam** The lights just went out in Australia — now it’s our turn to go green. Join us for the very first *Formula 1 (F1) Data Science & Machine Learning* meetup, happening the Monday after the season-opening Grand Prix. We’ll take the chaos, strategy and storylines from the race weekend and turn them into real, buildable data. This is a hands-on, low-ego, high-signal session where we’ll explore: * fresh race and lap-time datasets, * early-season performance trends, * and how raw F1 timing data becomes features, visualisations and ML-ready inputs. No slides. No hype decks. Just real race data, live notebooks and fast feedback. We’ll be working from an open F1 dataset built specifically for this community — and showing how it plugs into modern analytics stacks and modelling workflows. Whether you’re: * a data scientist, * an ML engineer, * a student, * or just dangerously curious about turning motorsport into machine learning… this is your pit stop. **Come for the race talk.** **Stay for the code.** **Leave with a dataset and something you actually built.**

**Important Availability Note:** This event will be free and open to everyone for the winter 2026 period: 10 weeks, from January 1 until March 15, 2026. Starting mid-March 2026, this will become available only to Starter ($25 USD/mo.) and Premium ($75 USD/mo.) plan holders on The French Club language platform (currently in development). \*\*\* **✨ French Shadowing Workshop — Confident Flow & Real Fluency ✨** January 26 – March 9\, 2026 \| Mondays\, 10:00–11:30 pm GMT \| Open to all levels \| Unlimited Number of Participants \| \*\*\* **Want to sound more French when you speak?** Join our free *French Shadowing Workshop* every Monday evening (January 26 – March 9, 2026). In just 75 minutes, you’ll train your ear, voice, and rhythm by repeating native French speech in real time — a powerful technique for fluency and confidence. \*\*\* **French Shadowing Workshop — Free & Open to All** Date: Mondays, January 26 – March 9, 2026 Time: 10:00–11:30 pm (GMT) Duration: 90 minutes per session Do you want to *sound* more French when you speak? This free weekly workshop introduces you to the powerful shadowing technique — a proven method for improving pronunciation, rhythm, and fluency. **What is shadowing?** You’ll listen to native French speech and *repeat out loud* (while being muted on Zoom) *at the same time*, just like a shadow. The focus is on sound and flow, not on translating word by word. This way, your brain and mouth adapt to the *real music of French*. \*\*\* **Why join?** * Train your ear to recognize authentic French speech. * Build muscle memory for French sounds and mouth movements. * Improve your intonation, rhythm, and natural flow. **Who is it for?** Open to *all levels*. Beginners will benefit from building sound patterns early; advanced learners will refine their accent and fluency. **Format** * Real-time shadowing practice * Group rhythm & Guided repetition No homework, no pressure — just 75 minutes of active listening and speaking every Monday evening. \*\*\* **Practical Details :** Duration: 90 minutes per session. Frequency: Once a week. Group Size: Unlimited The zoom link is: https://us02web.zoom.us/j/5456313643 The password is: galaxy Note: If you are a native French speaker: we kindly ask you not to join, as space is limited and our focus is assisting learners. \*\*\* **About me** As of November 25th, 2025, I’ve given 5,625 online lessons to 780 students from about 50 countries. For some info about me as a teacher, and testimonials, see: https://www.italki.com/F_Normandeau or https://www.italki.com/en/teacher/7237721 I look forward to assisting you soon. François Normandeau \*\*\*

Join **Large Outdoors** for a midweek hotel-based walking holiday exploring the scenic **Gower Peninsula**. With guided coastal and countryside walks, relaxed evenings and like-minded company, it’s a chance to get away for a few days of fresh air, good views and sociable walking. ### **What to Expect:** **Guided Walks** – Each day you’ll walk with an experienced guide who brings the landscape to life with local history and wildlife insights. **Gower Coast & Countryside** – From cliffs to quiet bays, coastal paths to inland trails, you’ll experience some of the Gower’s best walking. **Hotel Stay & Social Evenings** – Comfortable accommodation, shared meals and relaxed evenings give plenty of time to connect with the group. **Car-Free Friendly** – With good public transport links and collection options, this trip is accessible whether you travel by train or car. **Inclusive Atmosphere** – Welcoming whether you’re joining solo or with friends, and walking at a steady pace suits a broad range of walkers. **Location:** Gower Peninsula, South Wales **Full details & booking:** [https://www.largeoutdoors.com/gower-coast-midweek-walking-holiday](https://www.largeoutdoors.com/gower-coast-midweek-walking-holiday)

Vandome Cycles are providing drop in bike check/repair sessions: • Barking Riverside Bike Hub IG11 0FJ: Opening Times: Every Mon & Thu 3pm-7pm and Sat: 9am-5pm • The Fiddlers, Dagenham, RM8 3HH: Every Saturday 10am – 2pm

**Bookable via our website ➡️** https://www.thegoodlifecentre.co.uk/events/intro-to-woodwork-flip-lid-dovetail-box-6-afternoons-51/ ⋆⋆⋆ **Details:** An absorbing five-week course for confident beginners and an enjoyable learning experience for anyone with a little woodworking experience. Using a fusion of hardwood and softwood, this five-week course will teach you the fundamentals of woodwork and give you an opportunity to use classic hand tools; brass-backed tenon saws, sharp wood chisels and delicately honed vintage wood planes. This well-proportioned flip-lidded box is constructed of European redwood using a single dovetail joint at each corner and the fitted hardwood lid is attached to the base by a handmade ‘dowel’ peg hinge. The project will familiarise learners with many classic woodwork techniques and is taught with patience and enthusiasm by Andy Nicholl, who has devised this informative and challenging project. You will take home a treasure to treasure- and we hope it will enthuse you to learn how to make many handmade woodwork projects in the years to come. If your keyboard-weary hands have been needing the skill to fulfil and satisfy a yearning desire to create something you can hold, come and join us in our well-equipped and inspiring workshops and discover the wonderful world of woodwork. **Key skills:** * Measuring marking and cutting dovetail joints to make an accurate framed box. * Planing and shaping a hardwood lid to fit the softwood frame base. * Making and fitting a hardwood dowel joint to attach the frame base to the lid.

Join us on March 10th from **6:00pm** for a Data Streaming meetup hosted by **[Fresha](https://www.fresha.com/)**! 📍**Venue:** **Fresha** The Tower, 207 Old Street London, EC1V 9NR 7th Floor **PLEASE bring your PHOTO ID and REGISTER with your First and Last Name, Email. Thanks!** **DOORS CLOSE AT 7PM FOR SECURITY.** 🗓 **Agenda:** * 6:00pm – 6:30pm: Food/Drinks and Networking * 6:30pm - 7:00pm: Jesús Gómez-Escalonilla Guijarro, Data Engineer @ Fresha * 7:00pm - 7:30pm: Pranam Codur, Senior Solutions Engineer @ Confluent * 7:30pm - 8:00pm: Sreeram Machavaram C, Principal Architect @ Cognizant * 8:00pm - 9:00pm: Q&A Networking 💡**Speaker One:** Jesús Gómez-Escalonilla Guijarro, Data Engineer @ Fresha **Title of Talk:** Optimizing StarRocks Query Performance: Lost in JSON, Found by Northstar **Abstract:** StarRocks is fast, but understanding slow queries at scale is hard when plans are massive JSON. We built Northstar at Fresha to turn plans and execution metrics into a visual view you can reason about quickly. Through production case studies that reflect our real workloads, we'll show the bottlenecks Northstar exposed (scans, joins, skew, modelling) and how it made tuning faster and more systematic. **Bio:** Jesús Gómez-Escalonilla Guijarro is a Data Engineer at Fresha, where he focuses on building scalable and performant analytical data systems. He has been part of Fresha’s data team for several years, first as an Analytics Engineer and now in his current role, helping shape how data is modelled, analysed, and optimised across the organisation. Passionate about making complex systems understandable and efficient, Jesús enjoys tackling performance bottlenecks and sharing learnings with the wider data engineering community. 💡**Speaker Two:** Pranam Codur, Senior Solutions Engineer @ Confluent **Title of Talk:** From Data Mess to Data Streaming Platform **Abstract:** Most organizations want realtime data but are held back by brittle integrations, batch ETL, and siloed warehouses. In this session, we’ll walk through the Confluent Data Streaming Platform (DSP), which is built on Apache Kafka® and Apache Flink®, and a reference architecture you can use to ship governed, reusable real-time data products that power applications, analytics, and AI workloads. Attendees will leave with practical patterns to modernize existing Kafka and batch pipelines while maintaining security, lineage, and compliance. 💡**Speaker Three:** Sreeram Machavaram C, Principal Architect @ Cognizant **Title of Talk:** From "Data Rich and Information Poor" utility To "Event-driven, Real-time intelligent" operations **Abstract:** Utilities are massive and complex. Whether it’s water, gas, or rail, they operate treatment works, pumping stations, compressor sites, signalling systems, and vast networks that span cities and regions. Keeping these services running safely and continuously means collecting and interpreting data from highly distributed sites and their connected networks in real time. This machine data — from PLCs, sensors, third-party devices, and operational systems — reflects the physical world: pumps starting, valves opening, pressure fluctuating, trains moving, gas flows changing. But raw telemetry is noisy, inconsistent, and deeply technical. SCADA and other OT systems are often siloed and reactive. Engineering signals are hard for IT to interpret, leaving organisations unable to combine OT data with IT-based analytics and intelligence in real time. The result: fragmented visibility, alarm fatigue, and reactive decision-making. A Unified Namespace (UNS) and event-driven stream processing provides a solution. Using MQTT to publish operational events, Kafka as the enterprise backbone, and Flink for scalable stream processing, raw telemetry is filtered, contextualized, and transformed into meaningful, business-ready events. The outcome is IT-OT convergence in action — turning reactive, siloed systems into event-driven, real-time intelligent operations Intended to give a high-level approach and architecture around IO-OT convergence using UNS, Event Driven and Stream processing in modern intelligent utilities. **Bio:** Sreeram Machavaram C is hands-on practitioner specialising in utility solutions across IT-OT convergence, real-time data architectures, and stream processing. He works in a team that designs and builds event-driven systems that bridge operational technology (OT) and enterprise IT, enabling utilities to transform raw telemetry into actionable intelligence. \*\*\* If you are interested in hosting/speaking at a meetup, please email community@confluent.io

Join OutdoorLads popular weekly Thursday Bouldering evening at The Arch in Bermondsey. OutdoorLads London boulderers welcome all members of the LGBTQ+ community You'll be meeting with a supportive group of 5 to 10 plus boulderers who are always happy to introduce complete beginners or solve difficult bouldering problems with enthusiasts. We usually follow up with a pub visit. This event is for members of all levels of experience and all are welcome to come along to any of the sessions. Bouldering is a form of climbing where instead of long high routes, the 'problems', as they are referred to, tend to be shorter and focus on technique, balance, body positioning and sometimes power. Because of this different emphasis, bouldering doesn't have the hassle of climbing with ropes, harnesses and belaying, which makes the activities excellent for newcomers to the sport. If you're a seasoned climber you won't need convincing about the benefits of bouldering, but for those who've never climbed more than a staircase, the benefits are wide ranging: from the physical - improved strength, tone, balance, power and coordination; mental - problem solving, focus, concentration and body awareness; to the emotional - relaxation, a sense of achievement and a feeling that mind and body are working together perfectly ('feeling psyched'). On top of all this, bouldering tends to be a very social sport where you can hang out with mates and each have a go as you feel regardless of what level you climb at.

Join us for Grafana talks mixed with snacks and community conversations! Schedule 18:00-18:30 Welcome, snacks, drinks and networking 18:30-19:00 **From Service to Line Number: Getting Started with Continuous Profiling** by Christian Simon, Principal Engineer at Grafana Logs, metrics, and traces tell you which service is slow or expensive. Profiles tell you which code path - down to the line number. With profiling now part of OpenTelemetry, and the eBPF profiler requiring zero instrumentation, there's never been a better time to add this missing piece to your observability stack. 1\. Value of Continuous Profiling 2\. How do you set up continuous profiling \(Pyroscope \+ OTel eBPF profiler\) 3\. Deriving insights from Profiles using Grafana Assistant 4\. Demo 19:00-19:40 **My Cool Grafana Dashboard Show and Tell - Lightning Talks** **Lightning talks:** **1\. What if Your Career Had Metrics?** **Roxana Turc, Software Engineer at BNY**, will show how she used Grafana to build a **career dashboard—tracking learning, work, and growth**, and why seeing her progress this way changed how she thinks about development. **2\. Using Grafana for Visualising IoT Air Quality Sensor Data** by John Sinha, Lead Technical Business Analyst IoT air quality sensors produce noisy, high-resolution time series data, but how you visualise it determines what you actually see. This lightning talk walks through a Grafana dashboard designed to **present environmental data clearly, covering time and value scaling choices, linear vs. log views, and practical denoising techniques.** See how small visualisation decisions can dramatically change the story your sensor data tells. 3. **How I discovered pigeons sabotaging my project with Kafka and Grafana** \- by Hugh Evans\, Developer Advocate at Aiven Learn how how a lightweight Kafka + Grafana observability stack helped Hugh **catch his avian adversaries** and iterate on a hobby project **without enterprise-scale complexity or costs**.

Join OutdoorLads weekly Saturday bouldering morning event at Vauxwall West - please check our main event page on our website (link in the comments below). We welcome all members of the LGBTQ+ community, and you will be socialising with a supportive group boulderers who are always happy to introduce complete beginners to the sport or solve difficult bouldering problems together. This event is for members of all levels of experience and all are welcome to come along to any of the sessions. Bouldering is unique. There are few sports out there that offer a mental and physical challenge no matter what skill level you are at. Each route consists of several holds that the climber uses, focusing on problem-solving and technical movements to help them reach the top. No two routes are ever the same, and the colour-coded system indicates the difficulty level, so there's a climb for everyone to enjoy! If you have never tried bouldering before, please ensure that you have gone through the centre's safety and induction video beforehand (https://londonclimbingcentres.co.uk/pre-register/) as you will be required to answer a few safety questions when registering at the centre.

Welcome to our March event. We're delighted to welcome [Matt Johnson](https://www.linkedin.com/in/mhjwork/), CEO, Rayo, and [Dan Keely](https://www.linkedin.com/in/dan-keeley/), Principal Data Engineer, Rebura. **Matt** talks about hard-won AWS lessons on keeping cloud costs under control - plus a real “oops” story of how one small mistake can blow up your bill (and how to stop it happening again). **Dan** talks shares how hardware-style production thinking makes your data platforms more reliable, maintainable, and cheaper to run A big thank you to our sponsors [The Scale Factory](https://rebrand.ly/scalefactory) and [Cloudscaler](https://rebrand.ly/cloudscaler)! **Programme:** **18:00:** Arrival, registration **18:15:** Talks start **20:00:** Networking with food and a drink provided by the generosity of our sponsors. **Talk 1:** ***When things go wrong: Managing cost in the cloud with Matt Johnson.*** There are lots of sessions that talk about the theory of cost management and tooling available on AWS, but far less look at the real world challenges of using them in production, as well as the rough edges they have - not to mention what happens when things go wrong! In this session Matt will cover some of the hard lessons learned from working with AWS over the last 14 years, with a real-world example of how a simple mistake can cause problems, and how to avoid them in future. The presentation is aimed at both those new to AWS and to veterans of the platform, and also includes practical guidance on how to improve your cost management on AWS. Matt has been using AWS since 2011, including 8.5 years at AWS in the public sector tech org. He has presented at 6 separate re:Invents and dozens of other events, covering a wide range of topics. Now as CEO of Rayo, Matt continues to help customers deliver mission outcomes using cloud technology. **Talk 2:** ***Predictable Designs in Data Engineering on AWS with Dan Keeley.*** What if we treated data engineering systems the way world-class hardware teams treat products headed for mass production? John Teel (Texas Instruments) has spent years taking complex hardware from prototype to dependable, high-quality production at scale. In this talk, Dan borrows those “production-grade” principles - predictability, repeatability, and ruthless attention to failure modes, and translates them into practical patterns for building data platforms on AWS. This is less about any single AWS service and more about building data systems that behave consistently, even as requirements, volumes, and teams change. **What you’ll learn:** Attendees will leave with practical, reusable approaches they can apply immediately: * How to make systems maintainable * How to keep costs efficient without heroics * How to borrow best practices across engineering disciplines Dan is a community driven data engineer and now c-level team builder working with a wide range of Data technologies in the cloud. He is on the steering group for the biggest tech conference in London - BigDataLDN. He has won a number of awards, including being named in the top 50 data leaders and influencers in the UK. \-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\- If you are interested in speaking at one of our events please check out our [call for papers here](https://awsuguk.org/call-for-papers/). We are advocates for greater inclusion & diversity in UK Tech and are especially keen to receive talk submissions from people in underrepresented groups. If you are interested in speaking at a future meetup but would like to discuss what to expect or need assistance please contact our Inclusion & Diversity Lead Natalie Gray - graynataliej@gmail.com or DM her [@natjgray](https://twitter.com/natjgray) Check out our [website](https://awsuguk.org) for more information about our community. Remember to follow us [@AWSUserGroupUK](https://twitter.com/AWSUserGroupUK) and on [LinkedIn](https://www.linkedin.com/company/aws-ug-uk) for the latest updates and you can find videos of our past meetups on [YouTube](http://bit.ly/2dZnvEE). If you want to chat with other members, join our [Community Discord Server](https://discord.gg/yMa8Rvtsmy).

Outdoor First Aid (ITC Level 3 – 16 Hours) 2-Day Practical Course Delivered by Adventure Wild First Aid This hands-on, scenario-based Outdoor First Aid course is ideal for anyone who spends time in or is leading or supervising groups in remote or outdoor settings, where medical help may be delayed. It provides the essential skills and confidence to manage real-life incidents in the field. Cost: £140 per person (Plus Meetup booking fees This is a nationally recognised qualification, regulated by Ofqual and awarded through ITC First. The course meets the first aid requirements for most National Governing Bodies, including: • Mountain Training (Lowland Leader, HML, ML) • DofE Supervisors and Assessors • Rock Climbing Instructors • Paddle UK (British Canoeing) – for Paddlesport Leaders & Coaches • Watersports Instructors (SUP, kayaking, canoeing) • British Cycling MTB Leaders • Snowsport Instructors (BASI) Note: If you’re a Forest School Leader, please see our separate 2-day Forest School First Aid (ITC) course, which includes the required paediatric elements. **You’ll cover:** • Casualty assessment & scene management • CPR (including drowning protocols) & AED use • Bleeding, shock, fractures, spinal injuries • Medical emergencies: asthma, diabetes, seizures • Hypothermia, heat illness & outdoor-specific risks (e.g. bites, stings, infections) Course **Details:** • Location: Herts Young Mariners Base (indoor & outdoor settings) • Duration: 2 days (9:00–18:00) • Assessment: Ongoing through realistic, practical scenarios • Style: Highly practical delivery with minimal PowerPoint – no “death by PowerPoint” here! **Booking:** Contact us to book or enquire about group rates **Please note:** While this course is listed on the Adventure Women UK website, it is delivered by our partner brand Adventure Wild First Aid and is open to all. Both female and male participants are welcome.

Come and join us for a coffee/tea and chat as we discuss what’s hype and what’s real as well as how analytics helps us fight human trafficking. All Food and drink must be paid for as you consume it. A minimum of a drink must be orders can be water soft drink or coffe/tea etc excellent cocktails available.

Discover Kiro, AWS’s innovative development environment that adapts to your workflow. Whether you prefer specification-driven development or a more intuitive, vibe-based approach, Kiro empowers you to build applications your way. In this session, speakers will explore Kiro’s core functionality and its evolution through re:Invent 2025, along with demonstrations of prompts used to create APIs, hooks, and steering documents. In the latter part of the session, watch as we build a complete example from scratch, showcasing Kiro’s agentic AI workflow in action for spec-driven development and vibe coding. What You'll Learn - Core Kiro concepts and development philosophy Feature evolution: pre and post re:Invent 2025 Practical examples: API creation, hooks, and steering docs Live coding demonstration with real-time problem solving Who Should Attend - Developers, solutions architects, and technical leaders interested in modern AWS development tools and AI-assisted coding workflows. **Speakers Bio:** Matthew Jorat: Matthew Jorat is a Customer Solutions Manager at AWS with nearly three decades of expertise in AI, cloud transformation, migration, modernization, IT, technology, and business. His career spans infrastructure engineer, solutions architect, security auditor, customer success director, support and services director, and operations officer. He was an early adopter of AWS services as a customer, and his current role at AWS uniquely blends his technical and business skills as he partners with executive teams to translate strategic priorities into measurable business outcomes through cloud adoption, AI implementation, and operational excellence. Matt leads end-to-end AI initiatives for enterprise customers, identifying high-impact use cases and maintaining relentless focus on measurable ROI. He holds eight AWS certifications and serves as Adjunct Professor at Franklin University teaching cloud computing and AWS architecture. His expertise encompasses GenAI, agentic AI systems, migration, modernization, and optimization strategies that drive transformation at scale. [https://www.linkedin.com/in/mattjorat/](https://www.linkedin.com/in/mattjorat/) Girish Bhatia: Girish Bhatia is a seasoned technology delivery leader with deep expertise in cross-domain program management. He holds multiple AWS certifications, including AWS Certified Solutions Architect – Associate, AWS Certified Developer – Associate, and AWS Generative AI Practitioner, and is also an AWS Community Builder. Girish brings over two decades of experience in the information technology industry. Throughout his career, Girish has led major technology-driven business transformation from modernizing on-premises applications to driving large-scale cloud migrations. His work includes API-based integration platforms, data-center and mainframe modernization, and enterprise cloud adoption initiatives. Based in Columbus, Ohio, Girish works at a tech-forward fintech company. He is passionate about AWS serverless architectures, Generative AI and emerging cloud technologies. An avid learner and builder, he continues to explore and apply the latest innovations in AWS to help organizations accelerate their digital transformation. https://www.linkedin.com/in/girishbhatia/[https://www.linkedin.com/in/girishbhatia/](https://www.linkedin.com/in/girishbhatia/) **THANK YOU** *Franklin University* for hosting our meetup! To learn more about *Franklin University*, please visit their website: https://www.franklin.edu/ **DIRECTIONS** Franklin University Fisher Hall 300 E. Main St, Columbus, OH 43215 Map: https://maps.app.goo.gl/jxjBA2hUmS5qrvhq8 Parking is FREE! Please park in Lot C in front of Fisher Hall. See attached map. NOTE: Map the address only. When mapping with Google Maps it may use the Fisher Hall at OSU, which is NOT correct. **Want to sponsor the pizza and/or bar tab?** Please contact me if you would like to sponsor this meetup's pizza and/or bar tab: angelo@mandato.com

Want to be a speaker? submit your talk to our Call for Presenters!!! https://sessionize.com/cbus-hug-2026/

Window functions have nothing to do with the Windows operating system but provide a “window” to a result set when used in SQL queries. They are powerful, set-based methods to view data in unexpected ways. Window functions provide easy, set-based solutions to solve some common problems: * Using running totals * Performing operations in intervals * Identifying data gaps and islands * Performing aggregates without losing detail Many people are confused by window functions and do not know how to use them properly. This session will explore window functions, how they work, and how to use them. Demonstrations with several examples will solidify how window functions can simplify queries and make them more powerful.

Builders, creators, architects, admins, consultants - come one, come all. This one's for you. We're bringing a little friendly competition to the Columbus ServiceNow community while highlighting the cool things people have built on the platform. Five presenters will take the stage to showcase something they've built, solved, designed, or imagined on the ServiceNow platform - and a panel of judges (plus YOU, our amazing audience) will score them live. So basically, America's Got Talent but make it ServiceNow's Got Talent. Bring a notepad if you'd like 'cause you'll definitely be learning something new. Each presenter gets 10 minutes max to wow the crowd with: • A demo • A real-world business solution • A bold idea • A UX transformation • Or a creative use of the platform Judging Criteria: 🏆 Business Value 🚀 Innovation ✨ User Experience This event is about celebrating ideas, sharing knowledge, and showing how ServiceNow can drive both business impact and meaningful user value. Come learn. Come support. Come get inspired. Refreshments and bites will be provided. And maybe next time… you’ll be on stage.