Scientific Computing

**Hi Ceph Berlin Meetup Cephalopods !** Let's get in touch and meet again in Berlin ! As always, it's about exchanging ideas about Ceph, what Ceph is, the latest developments in the community, and what you do or plan to do with Ceph. Please, check the themes list below for what you want to add - let me know or let's discuss it in the \`discussions\` or via \`chat\`. However, don't be shy - we all learn although some of us may be more experienced and those will be the source of your learning and experience. **We have for the actual themes this round (for now):** **Ceph intro for newbies ( 17:50 - 18:40 ): This is \*before\* the main meetup.** * What is Ceph - Ceph intro for newbies - watch out for additional invite, published separately **Main meetup ( 18:50-20:50 or longer ):** * perhaps, Ceph Days London results * no specific themes yet - please suggest or volunteer !!! * anything that's on your mind about Ceph **A little bit of housekeeping upfront:** * there will be no recording * presentations will be shared - if there are some and if it's possible * drinks and food is up to the participant :-) - so feel free to take your favorite drink and snack - we can arrange some beverage * if you have something to bring to the venue and share - food is always welcome ⇒ but check for the number of people planning to attend in person * **as we did at some time in the past too, perhaps plan for a beer/somethingElse (or two) as the "after-show" in the area around the location** **Any changes required ? Anything we should do differently ? Do you want to suggest a better time ? Any thoughts and suggestions are welcome.** Somebody has room for us and wants to offer a location to meet - let us know, the \`discussions\` is the place to do this. Since the location for in-person might be not shown, here it is: **Red Hat, ℅ Design Offices,** **Leipziger Pl. 16, 10117 Berlin** **We'll meet on June 29th 2026 in front of the main entry facing the Leipziger Platz, between 18:40-18:50, so please be on time or give me a call on +49-160-92654111 in case you're late.** **Important: Give me a call if you are late ! You cannot enter the building or come to the office on your own.** Watch out for somebody with a red hat. **Please, RSVP before Sunday 28th 2026, so that we can learn how many people will join.** See you soon ! Matthias.

**Hi Ceph Berlin Meetup Cephalopods - and especially newbies to Ceph!** **Before we start** our main meeting on **Monday June 29th 2026**, I could offer a **short introduction for people new to Ceph**. **If you are interested in a 50 min overview before the main meetup starts, please, reserve time from 17:50 to 18:40 and RSVP for attending in person. This will not be an online meeting.** **Red Hat, ℅ Design Offices,** **Leipziger Pl. 16, 10117 Berlin** **We'll meet on June 29th 2026 in front of the main entry facing the Leipziger Platz, between 17:30-17:40, so please be on time or give me a call on +49-160-92654111 in case you're late.** Watch out for somebody with a red hat. **Important: Give me a call if you are late ! You cannot enter the building or come to the office on your own.** Remember: RSVP is required so that I have an understanding whether there will be people interested in this pre-meetup meetup :-).

Welcome to Wet Chickens Comedy - The CREATIVE Open Mic that isn't like any other Open Mic! Comedians aren't allowed to use any old material - NEW JOKES ONLY! And in case they do old jokes. they will get wet, because the host will spray them with a toy water pistole!* *or with something else, but we will! When? Every Monday from 8PM Where? Agata Bar, Weichselstr. 55 in Berlin, Neukölln How much? Its FREE, just get you a reservation, because they might be SOLD OUT soon Doors: 19:30 Show: 20:00 *Reservations are only kept until 19:50, so please arrive before that for assured seating.

We make landladies and landlords. They buy a flat and pay just 1/4. Tenants and tax cuts pay 3/4. It's not a trick. It's government policy. Our Federal Governments, past and present, want taxpayers to become landlords and landladies, buy property, rent it out to tenants and enjoy passive income later. Come check this out. No strings attached. No sales. Just a meet and greet for orientation. And an after work drink. Wir machen Vermieter. Steuerzahler kaufen eine Wohnung und zahlen dafür nur 1/4. Mieter und Finanzamt zahlen 3/4. Das ist kein Trick. Das ist Politik: Alle Bundesregierungen wollen, dass Steuerzahler Wohnungen kaufen, Mieter reinnehmen und später Beton‑Rente bekommen. Info-Abend nur zur Orientierung. Kucken kostet nichts. S,U Bahnhof Zoo, Kantstraße 163-165, 10623 Berlin, Motel One Upper West, 10th floor, exit lift to the right, turn left, circumvent the sign "vorübergehend geschlossen" Go justs there. I'll be there Georg Holzach. 0177 8181 900 WhatsApp Wanna read somethin before: landlord.holza.ch betonrente.holza.ch

**Open Platform for Writers to connect, share & grow. Together.** ‍ We create a safe space to be creative, connect through writing and give and receive feedback from each other. Get ready for bringing in different writing styles and helping each other improve our own writing skills and get to know some new friends.

**\*\*This event has been free for over three years, but only due to the support of anonymous donations behind the scenes. Please consider [donating via Eventbrite](https://www.eventbrite.de/e/read-wedding-a-berlin-open-mic-for-poetry-storytelling-tickets-1975773081473?aff=oddtdtcreator) if you are able, to help this stay free for everyone else.** -- Whether you're poetry-curious or a seasoned performer, join us for our monthly open mic night at Hank Chinaski! This event is brought to you, for free\*\*, by the [Re(a)d VVedding Collective](https://www.instagram.com/readwedding/), who organize regular events for all phases of the writer's journey, all in the northern Kiez(es) of Berlin. Join us for our core event which has been going on in Wedding for over three years. You are most welcome to share your work (or that of writers you admire) & meet fellow enthusiasts through this event. All written works & languages are welcome, though bigotry, racism, transphobia, Islamophobia, antisemitism (which *is not Anti-Zionism*), and so on are not welcome in this space. **Format - 3 sections:** * Sections 1 & 2: ≈12 performers (≈6 per section, kicking off at 19:30) * Section 3: Around 21:30, we'll hold space for a writing session and optional sharing afterwards. This open mic is not only about already “finished“ work! For the readings, priority is first given to those who haven't read earlier in the evening & especially to first-time readers! **\*\*Donation​s:** * While our open mic will always be free, we do happily accept donations [via Eventbrite](https://www.eventbrite.de/e/read-wedding-berlin-open-mic-for-poetry-storytelling-tickets-670852075617?aff=oddtdtcreator) or at the door. * Donations do not guarantee a reading slot, but help support us in putting in this event, others around Wedding, Pankow and Moabit, and our ongoing zine publications. We appreciate it deeply and as a small collective, will put it to good use! **RSVPs​ & Sign Up:** * RSVP via Meetup, Eventbrite, or just show up. Online RSVPs DO NOT save performance spots * Sign up at the door between 19:00-19:30 * 5-minute performance slots. Please respect this limit to avoid cutting off your work Experience the magic of live storytelling and poetry with us!

**📢 Wichtiges Update für das Sprachcafé in Manifesto! 📢 2. Etage wo es geschlossen ist. Alle Teilnehmende müssen etwas bestellen. Wenn nicht, werden wir** uns in Neukölln treffen. Ein Getränk bei der **Soot** **Bar (u**nten bei den WCs) oder Essen woanders zu kaufen, damit wir dort bleiben dürfen. Danke fürs Mitmachen! 😊

This will be the first meetup of the group. A relaxed evening for people interested in bug bounty hunting, web security, AppSec and vulnerability research. The main goal is to meet like-minded people, talk about bugs, tools, targets, methodology, reports, interesting findings and whatever else comes up around security research. Since it is the first event, we can also spend a bit of time discussing how future meetups should be structured: casual chats, hacking sessions, short talks, tool sharing, report discussions or presentations. As soon as at least **3 people join**, I will look for a suitable location. The first meetup will probably be in a **café, bar or restaurant**. If there is enough interest in presentations, I can also look into booking a room with a **TV or projector** for future events. No preparation needed. Please keep everything legal and authorized.

**The AWS Women’s User Group Berlin** is thrilled to invite you to our upcoming meetup sponsored by Storm Reply focused on **Building production-ready AI agents for real-world impact.** Join us for a deep dive into how to build, observe, and evaluate AI agents at scale. You’ll also see how these ideas come to life in a real-world climate-smart agriculture solution that turns weather forecasts into actionable field guidance. Whether you’re building agentic systems today or planning what comes next, this meetup will give you practical insights into making AI agents work in production. **Speaker Info** **Keynote Talk** **Speaker:** Tetiana Senna **Position:** Team Lead / Senior Project Manager, Storm Reply **Talk Title:** Trust, but Verify: Observability and Evaluations for AWS Agents **Abstract:** Getting an AI agent to work in a demo is easy. Knowing whether it still works in production - after the next prompt change, the next model upgrade, the next edge case - is the hard part. Unit tests don't cover non-deterministic behavior, and manually reviewing a handful of runs doesn't scale. This talk walks through the two practices that close that gap: observability (understanding what actually happened inside your agent) and evaluation (deciding whether the outcome was any good). We'll dig into Amazon Bedrock AgentCore's Observability and Evaluations capabilities, compare the proven evaluation approaches - built-in LLM-as-a-Judge evaluators for automatic quality monitoring, and custom evaluators for business-specific correctness checks - with a candid look at what each one is good for, where it falls short, and what it costs to run at scale. We'll also take a close look at AgentCore Optimization, AWS's newly previewed feature in this space. **Applied Agentic AI Talk** **Speakers:** **Vidhu Mitra Malladi:** Senior Software Engineer, Yara Digital Farming **Chamika Hasanthi:** Senior Software Engineer, Yara Digital Farming **Talk Title:** Weather Risk Intelligence Agent for farmers & Agronomist Abstract: Unpredictable weather events — heavy rainfall, drought, frost, and heatwaves pose significant risk to crop yield and fertilizer efficiency. While forecast data is widely available, it is rarely translated into timely; field-level guidance farmers can act upon. Using AWS AgentCore framework and AI capabilities, we can turn weather predictions into clear agronomic actions, supporting climate-smart agriculture at scale. **You'l learn:** * Implementation of the solution using AWS Agent Core framework * Architecture of the project. 🗓️ **Event Details:** \- Date: Tuesday\, June 30th \- Venue: Storm Reply GmbH\, [address](https://www.google.com/maps/place/Storm+Reply+GmbH/@52.5012692,13.368852,17z/data=!3m1!4b1!4m6!3m5!1s0x47a851119af460c5:0x35e34ba578e8b1ec!8m2!3d52.5012692!4d13.368852!16s%2Fg%2F11gg9298pv?entry=ttu&g_ep=EgoyMDI2MDUxNy4wIKXMDSoASAFQAw%3D%3D) \- Time: 06:00 PM \- 9:00 PM Doors open at 6:00 PM Food & drinks will be provided. 📋 **Program Schedule:** **18:00** \- Registration and Welcome Networking **18:20** \- AWS Women's User Group Welcome **18:30** \- "Trust\, but Verify: Observability and Evaluations for AWS Agents" **Speaker:** Tetiana Senna, Team Lead / Senior Project Manager, Storm Reply A practical session for anyone working with AI agents on AWS who wants the confidence to put them in front of real users. You'll leave with a clear framework for monitoring agents in production and a concrete approach to evaluating their behavior over time. **19:15 - 19:30** Break **19:30** \- "Weather Risk Intelligence Agent for farmers & Agronomist" **Speakers:** Vidhu Mitra Malladi, Senior Software Engineer, Yara Digital Farming & Chamika Hasanthi, Senior Software Engineer, Yara Digital Farming Discover how AI agents can transform weather forecasts into actionable, field-level farming guidance. **20:10** \- Q&A and closing remarks **20:15 - 21:00** Networking, food & drinks 🎟️ **RSVP** Don't miss this excellent opportunity to connect with Tetiana, Vidhu, the AWS WUG Team and a thriving community of cloud enthusiasts and professionals. Secure your spot by RSVPing now! Seats are limited! Please note that this user group is specifically for WOMEN and FLINTA\* (female, lesbian, inter, trans\*, non-binary, and agender) only. Please also check out the AWS User Group Berlin. \*\*\*\*\*\* 🚨Attention🚨 This meetup is hosted at Storm Reply GmbH and attendees must be registered to go through building security. Make sure you bring an ID card with you, and you register the event with a valid name that matches to your ID. Media and Consent: We inform all attendees that photographs and videos will be taken during the meetup and will only be used by the event organizers for documentation and promotional purposes. By RSVPing to this event you are consenting to our media policy. Please let the organizers know if you do not want to be in the pictures/videos. Thank you very much for your cooperation! \*\* The AWS Women’s User Group is the very first official women-centric AWS User Group in DACH and EMEA. This group serves as a secure and supportive platform for women who want to share their AWS knowledge, passion for cloud computing and advance their career through targeted learning opportunities. We extend a warm invitation to FLINTA individuals who are interested in being part of our User Group. Code of Conduct: At the AWS Women's User Group in Berlin, we have a strong and unequivocal code of conduct in place to create a safe and empowering environment for all.

📆 Agenda * 19:00 Welcome to the PUB (Python Users Berlin) – setting up * 19:15 Main talk * 20:00 Lightning talks * 20:30 Social gathering 🎙 Main talk by [Sam Bail](https://www.meetup.com/de-DE/members/57634242/): PySpark PySpark is a powerful library that brings Apache Spark’s distributed computing capabilities to Python, making it a key tool for processing large-scale data efficiently. In this talk, data engineer and analyst Sam Bail provides a structured and hands-on introduction to PySpark, starting with an overview of Apache Spark, its architecture, and its ecosystem, such as Databricks. Learn about Spark’s core concepts, such as the DataFrame API, transformations, lazy evaluations, and actions, before setting up a lab environment and working with a real dataset. Plus, gain insights into how PySpark fits into a broader data engineering ecosystem and best practices on running PySpark in a production environment. 👩‍💻 About [Sam Bail](https://www.meetup.com/de-DE/members/57634242/) Data engineer and engineering leader with 10+ years building platforms and teams across healthcare, marketplaces, and data infrastructure at NYC tech startups. I teach data engineering courses on LinkedIn Learning and O’Reilly, focused on making complex topics accessible to everyone. I also founded Bright Nights Social, an alcohol-free nightlife community that’s produced 100+ events across NYC. You’ll probably find me on a dance floor or running around Berlin this summer (training for the Berlin marathon). 📚 Resources * [Apache Spark](https://spark.apache.org/) * [PySpark](https://spark.apache.org/docs/latest/api/python/index.html) * [PySpark DataFrame API](https://spark.apache.org/docs/latest/api/python/getting_started/quickstart_df.html) ⚡️ Lightning talks We would like you to give a lightning talk (shorter than 10 minutes) about what you are doing with Python. 📍This will be a face-to-face meeting.

**You complain — we entertain!** **An hour long chill-but-fun showcase where comedians turn your anonymous problems into punchy on-stage therapy** Write down anything you want - from dating disasters to existential crisis & watch comedians solve it in the craziest way possible. ❗️**You stay anonymous, and we won't talk to you unless you want us to!** Perfect for introverts, overthinkers, and anyone who needs a laugh **Doors 20:00 \| Show 20:30** * Stand-up comedy + live "therapy" * Different lineup + new problems every show Every show is a fresh combo of stand-up brought by the guest comedian and advice from the host **Lena Stolby** — she's Russian, so she really knows about problems! & **THIS IS A PAID WHAT YOU CAN EVENT** We have been running solely thanks tolthe support of the audience. **Suggested contribution: €15** standard / **€12** reduced (student, unemployed)

We're helping spread the word about the upcoming Berlin FinOps Foundation Meetup and would love to see more of our Meetup community there. Please note: **registration is handled by the FinOps Foundation**, not through Meetup. Secure your spot here: [https://community.finops.org/event/berlin-finops-foundation-meetup-july](https://community.finops.org/event/berlin-finops-foundation-meetup-july) The event brings together FinOps practitioners, cloud cost leaders, and community members for networking and knowledge sharing. If you're interested in FinOps, cloud financial management, or connecting with peers in the Berlin area, this is a great opportunity to join the conversation. We're also excited that Henrique Amorim, who recently started as the FinOps Foundation's EMEA Community Lead, will be joining this event. Henrique is eager to connect with the community, share ideas, and discuss the future of the FinOps community across Europe. Bring your questions, feedback, and thoughts on where the community should go next. Register via the FinOps Foundation event page above and we'll see you there.

Join us for the **Berlin DevOps Summer Meetup**: our last edition before the summer break! We're excited to be hosted by **Parloa** for an evening of interesting talks, discussions, and networking. There will be food and drinks provided, and plenty of time to connect with fellow DevOps enthusiasts. **📌 Please register at least 24 hours before the event.** We need to share the attendee list with the Parloa office in advance, and **spots are limited**. \-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\- **Agenda** 18:30 Open Doors, Networking with Food and Drinks 19:00 Welcome words by Parloa and BLN DevOps team 19:25 **Running K8s with AI: Automating** **the SRE Lifecycle with Grafana MCP and GitLab** 19:50 **The Pipeline Was Green — AI Agents and CI Trust** 20:15 Short Break 20:30 **Managing Uninvited Guests: Securing Open Source Dependencies** 20:55 Networking 21:30 Closing ➡️ Interested in hosting an event? Fill out our [Call for Hosts](https://docs.google.com/forms/d/e/1FAIpQLScBpga8Yp-QAQt2lGskZWOThaKyQ_MbMbZaNcklgeXxqr5Vrg/viewform?usp=sf_link) and let's set up a meeting. \-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\- *Christoph Ebeling* **Running K8s with AI: Automating** **the SRE Lifecycle with Grafana MCP and GitLab** What does it look like to run 30+ microservices, 8 databases, and a Kafka cluster almost entirely through AI agents? This talk walks through a practical demo of automating the full SRE lifecycle: from incident investigation to deployment validation, using Grafana MCP and the GitLab Agent Platform, and where humans still need to stay in the loop. *Serhii Vasylenko* **The Pipeline Was Green — AI Agents and CI Trust** We’ve spent years building CI/CD pipelines that tell us when code is "technically correct," but are they capable of telling an autonomous AI agent if a change is safe to apply? This talk explores a real-world incident where an AI-powered automation -- pairing Renovate with Claude Code -- successfully executed a "green" pipeline that broke a critical QA cluster for three days, how the team reacted, and how we evolved our vision toward the future of human-agentic collaboration with code. *Frithjof Hoffmann* **Managing Uninvited Guests: Securing Open Source Dependencies** Open source software is the ultimate neighborhood party, but what happens when an uninvited guest slips through the door? This talk digs into the messy reality of dependency hell and its role in software supply chain security: from typosquatting attacks to maintainer account takeovers, and the abandoned projects with known CVEs quietly living in your codebase rent-free.

We are back in the c-base! Do you already run NixOS and want to talk to other people or want an introductory session with some NixOS users. Just bring your machine! Usually there are no topics, we just sit in front of our computers, talk about stuff, debug some problems or review some PRs on nixpkgs. There are drinks usually available from the c-base bar. If you can't find us. just ask around or ask in irc (#krebs on hackint)

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

**Improving Office in Franklinton** Physical location: Improving Office 330 Rush Alley Suite #150 Columbus, OH 43215 Schedule: 6:00 p.m.: Socialize, eat, and drink. Improving will be providing pizza and beverages. 6:30 to 8:00 pm. Main meeting and presentation(s). Topic: This month Chris Pazsint will be talking about Agentic Coding. How does one use CLI Based Agents, and Agentic IDEs such as Cursor, Kiro, Antigravity? How to include agentic coding plugins for IDEs you already love such as Visual Studio Code. We meet on the last Monday of each Month. Presentations are given by members and friends of this group. If you would like to do a presentation (small or large) on a python topic, please contact Central OH Python at centralohpython@gmail.com

**Latest Dojo Location!** **Knotty Pine Brewing** 1765 W 3rd Ave, Columbus, OH 43212 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 speakers for our Monthly Meetups! Fill out the form if you are interested in presenting to the Python Community. https://forms.gle/ehSfUAC2WgR34Crq9

Bring your Raspberry Pi, Arduino, microcontroller, or any other electronic project and join fellow electronics makers for a night of creativity and collaboration! This session is open forum to share your current projects—whether complete or in progress, it’s all interesting! Whether you’re deep into embedded systems, exploring new ideas, or just getting started, you’ll find a welcoming space to collaborate, share, and get inspired. **New to electronics or curious about tinkering?** You’re absolutely welcome. If you’re a beginner and want to experiment, I’ll have a couple of starter kits available so you can try things out—whether that’s blinking your first LED, putting something on a display, or experimenting with simple sensors. No pressure and no experience required—just an interest in learning and building. While we continue to pursue a more permanent venue for this Meetup, we’ll be using public library facilities based on availability.

We connect you with up to 30 Men or Women tennis partners close to your PLAYING REGION and skill level. This program is less competitive, no champions crowned, no league standings just dedicated tennis partners who want to meet up with you on the courts. Players will meet up to play a tennis match or just to hit around. Just go through the [Join Page](https://www.tenniscolumbus.com/partner-program) to enter this program. [https://www.tenniscolumbus.com/partner-program](https://www.tenniscolumbus.com/partner-program)

Most people use LLMs by feel: ask a question, read the answer, decide whether it “seems good,” and move on. That works for casual use. It does not work when you are building software, automating workflows, writing important documents, or relying on AI for anything that needs to be repeatable. In this talk, we’ll look at how to improve and evaluate the inputs and outputs of LLMs using practical measurement techniques. We’ll cover how prompt changes affect results, how to compare outputs, how to build simple evaluation sets, and how math-based methods like similarity scoring can help you move beyond guesswork. This will be beginner-friendly, so even if you don't know anything about AI, you should get something out of it. However, this will be a little more technical than our intro talks. You do not need to be an AI researcher, but programmers and technically curious attendees will get a lot out of it. We’ll cover: * Why “it looks good” is not enough * How to improve prompts by changing the input, context, and constraints * How to compare LLM outputs more systematically * Basic evaluation techniques for accuracy, consistency, and usefulness * How embeddings, cosine similarity, and scoring can help evaluate results * Where automated evaluation works — and where humans still need to stay in the loop By the end, you’ll have a practical mental model for treating LLMs less like magic and more like systems you can test, measure, and improve. LOGISTICS AND PARKING: The talk starts at 7:00 PM. The first half hour is reserved for everyone to get set up and mingle. Free pizza and drinks! The cheapest parking option is to find street parking, which will only cost you a few bucks. Otherwise, park in the nearby veteran's museum lot for $8. It's highly recommended you avoid the nearby $15 garage parking.

We have moved to guild.host. Look us up there. https://guild.host/events/buckeye-cocoaheads-rcavwd