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Apache Cassandra®

@cassandra.apache.org
352 followers 15 following 907 posts

Updates from a true open source distributed application database   trusted by thousands of successful companies for    best-in-class scalability, availability, performance      and unbeatable fault-tolerance + reliability. (I follow my PMC)

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Apache Cassandra® @cassandra.apache.org · 27/09/2026
Security, analytics, tooling. Five talks on our edges: Sidecar, mutual TLS, terabyte ingestion, analytics in place, and the command line. Apache Cassandra® track, Community Over Code, 11–13 Oct. cassandra.apache.org/_/events/202...
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Apache Cassandra® @cassandra.apache.org · 26/09/2026
Five talks coming about Apache Cassandra operations at scale. Sidecar automation. 400+ clusters migrated. 4→5 upgrades. Graceful shutdown. And a management-port decision argued in public. Apache Cassandra® track, Community Over Code, Glasgow. cassandra.apache.org/_/events/202...
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Apache Cassandra® @cassandra.apache.org · 22/09/2026
Storage and performance: five talks coming up on below the API. Memtables off the heap. The 6.0 write path. A profiler built into the server. Dictionary compression. And tries, aimed at tombstones. Community Over Code, Glasgow, 11–13 Oct. cassandra.apache.org/_/events/202...
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Apache Cassandra® @cassandra.apache.org · 18/09/2026
How does Apache Cassandra® shows its transactions are correct ? A consensus protocol. A TLA+ model of it. A fuzzer guided by it. A benchmark harness. And a talk arguing the result is just a database. Five talks, Community Over Code, Glasgow. cassandra.apache.org/_/events/202...
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Apache Cassandra® @cassandra.apache.org · 06/09/2026
"Much Ado About Nothing" is the optimistic version of a major-version upgrade, and the one nobody promises out loud. Mariah and Carlos on making Apache Cassandra® 4→5 predictable. Mariah McLaughlin, Carlos Rolo — NetApp Instaclustr cassandra.apache.org/_/events/202...
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Apache Cassandra® @cassandra.apache.org · 05/09/2026
Multi-partition transactions in Apache Cassandra® rest on Accord — CEP-15, a leaderless consensus protocol built to commit across shards without a coordinator becoming the bottleneck. Fedor Ryabinin, IMDEA Software Institute, on how it works. cassandra.apache.org/_/events/202...
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Apache Cassandra® @cassandra.apache.org · 01/09/2026
Bloomberg maintained a proprietary sidecar for years, then replaced it with Apache Cassandra® Sidecar and upstreamed what was missing. Isaac Reath and Paulo Motta on why they switched, and what it cost. cassandra.apache.org/_/events/202...
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Apache Cassandra® @cassandra.apache.org · 30/08/2026
Memtables live on the JVM heap. The heap has a garbage collector. The garbage collector has opinions about your p99. Branimir and Kamil on moving them fully off-heap. Branimir Lambov — Software Engineer, IBM/DataStax Kamil Leśniak — Software Engineer, IBM cassandra.apache.org/_/events/202...
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Apache Cassandra® @cassandra.apache.org · 27/08/2026
Request decoding. Validation. Coordination. Memtable allocation and flush. Compaction. Metrics. A year of source-level work on the Apache Cassandra® 6.0 write path, and the flamegraphs that found each one. Dmitry Konstantinov, NetCracker Technology. cassandra.apache.org/_/events/202...
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Apache Cassandra® @cassandra.apache.org · 26/08/2026
Tombstones and manual partitioning: two long-standing frustrations in Apache Cassandra®, and both fall out of one design decision. CEP-57 flattens the key hierarchy to a byte sequence and puts tries over it. Branimir Lambov and Christophe Bornet, IBM. cassandra.apache.org/_/events/202...
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Apache Cassandra® @cassandra.apache.org · 25/08/2026
Apache Cassandra® supports one authenticator per node, so changing authentication method on a live cluster means moving every client at once. CEP-50 lets clients advertise what they support while the server keeps the decision. Joel Shepherd, Amazon.com. cassandra.apache.org/_/events/202...
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Apache Cassandra® @cassandra.apache.org · 25/08/2026
Apache Cassandra® drivers ignore topology DOWN events — they aren't reliable. So a node deliberately shutting down keeps taking requests until its connections fail. CEP-59 tells the client instead. Jane He, IBM. cassandra.apache.org/_/events/202...
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Apache Cassandra® @cassandra.apache.org · 23/08/2026
400+ Apache Cassandra® clusters. Up to 50 in a night. Zero downtime. Pegasystems and NetApp Instaclustr built a Migration API to do it. Carlos Rolo brings the alert storms, the platform limits and the split-operations bug too. cassandra.apache.org/_/events/202...
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Apache Cassandra® @cassandra.apache.org · 18/08/2026
"Apache Cassandra®: A Normal Database" Transactional metadata. Distributed transactions. Full ACID. Mutation tracking. Scott Andreas lays years of community work side by side and asks what's left of the caveats – Core Databases, Apple. cassandra.apache.org/_/events/202...
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Apache Cassandra® @cassandra.apache.org · 17/08/2026
[RELEASES] ⦿ Python Driver version 3.30.1 ⦿ GoCQL Driver version 2.0.0 ⦿ GoCQL Driver version 2.1.2 ⦿ Java Driver version 4.19.3 ⦿ Analytics version 0.4.0 Download them at: cassandra.apache.org/_/download.h... Thanks to everyone who helped make all these releases happen ‼️
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Apache Cassandra® @cassandra.apache.org · 16/08/2026
[RELEASE] Apache Cassandra 5.0.9 is out ‼️ Download it at: cassandra.apache.org/_/download.h... News: github.com/apache/cassa... Changelog: github.com/apache/cassa...
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Apache Cassandra® @cassandra.apache.org · 16/08/2026
[RELEASE] Apache Cassandra 6.0-alpha2 is out ‼️ This alpha off the cassandra-6.0 release branch is for testing and development purposes. Download it at: downloads.apache.org/cassandra/6.... News: github.com/apache/cassa... Changelogs: github.com/apache/cassa...
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Apache Cassandra® @cassandra.apache.org · 16/08/2026
The Apache Cassandra® community is running a three-day track at Community Over Code 2026, the official conference of the Apache Software Foundation, at the Hilton Glasgow. Twenty sessions, from twenty-seven speakers across a dozen organisations. cassandra.apache.org/_/events/202...
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Apache Cassandra® @cassandra.apache.org · 23/03/2026
[RELEASE] Apache Cassandra Releases 5.0.7 , 4.1.11 and 4.0.20 are out ‼️ Downloads: cassandra.apache.org/_/download.h... Changelogs:  • github.com/apache/cassa...  • github.com/apache/cassa...  • github.com/apache/cassa...
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Apache Cassandra® @cassandra.apache.org · 23/03/2026
[RELEASE] Apache Cassandra Sidecar 0.3.0 is out! Downloads: downloads.apache.org/cassandra/ca... Changelog: github.com/apache/cassa... #ApacheCassandra #NoSQL #OpenSource
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Apache Cassandra® @cassandra.apache.org · 22/02/2026
www.linkedin.com/feed/update/...
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Apache Cassandra® @cassandra.apache.org · 01/02/2026
@IBM, thanks for the love ❤️ Supporting (vendor-neutral) open source projects is everything to us. www.ibm.com/opensource/
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Apache Cassandra® @cassandra.apache.org · 09/12/2025
Jon Haddad's third post in his Cassandra series on maximising cost efficiency rustyrazorblade.com/post/2025/07...
image from chatgpt
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Apache Cassandra® @cassandra.apache.org · 19/11/2025
An incredible increase in numbers, from last week's meet-up in Seattle cassandraossmeetup.splashthat.com It's a repeating story of companies doubling down their consolidation efforts on Apache Cassandra.
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Apache Cassandra® @cassandra.apache.org · 09/11/2025
Did you know Apache Cassandra was the top-most mentioned Apache technology at the ASF's Community Over Code conference this year 🫡 Thanks for the write Paul Brebner www.linkedin.com/pulse/commun...
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Apache Cassandra® @cassandra.apache.org · 29/10/2025
[RELEASE] Apache Cassandra 5.0.6 Downloads cassandra.apache.org/download debian.cassandra.apache.org redhat.cassandra.apache.org/50x/ Changelog
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Apache Cassandra® @cassandra.apache.org · 22/10/2025
If you're in Seattle Nov 11th ! C* OSS MeetUp 5:15-8:00PM Pizza & some great talks… 1. [Apple] Streaming C*: Native CDC w/ Kafka 2. [Netflix] Behind the Scenes: Empowering Live Events w/ C* 3. [AWS] AWS Commitment to OSS 4. [Uber] First-Class Support for C* MVs cassandraossmeetup.splashthat.com
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Apache Cassandra® @cassandra.apache.org · 22/10/2025
[RELEASE] Apache Cassandra Java Driver 4.19.1 Downloads downloads.apache.org/cassandra/cassandra-java-driver/4.19.1/ repo.maven.apache.org/maven2/org/apache/cassandra/ Change log github.com/apache/cassandra-java-driver/tree/4.19.1/changelog
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Apache Cassandra® @cassandra.apache.org · 20/10/2025
[RELEASE] Apache Cassandra 4.0.19 Downloads cassandra.apache.org/download debian.cassandra.apache.org redhat.cassandra.apache.org/40x/ Changelog
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Apache Cassandra® @cassandra.apache.org · 16/10/2025
[RELEASE] Apache Cassandra GoCQL Driver version 2.0.0 Downloads downloads.apache.org/cassandra/cassandra-gocql-driver/2.0.0 You can add the driver to your project with the "v2.0.0" tag: ``` go get github.com/apache/cassandra-gocql-driver/v2@v2.0.0 ``` Changelog
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Apache Cassandra® @cassandra.apache.org · 12/10/2025
Vote passes to include CEP-38 🥳 CQL Management API This work will replace JMX operational functionality and tooling with a CQL interface. More info: cwiki.apache.org/confluence/d...
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Apache Cassandra® @cassandra.apache.org · 12/10/2025
Living with Accord by Ariel Weisberg Ready to unlock the power of strictly serializable multi-key transactions in Apache Cassandra with just one WAN round trip? 🚀 The Accord consensus protocol is the future but migrating a live, production cluster can seem daunting www.youtube.com/watch?v=MKUY...
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Apache Cassandra® @cassandra.apache.org · 26/09/2025
We are happy to announce Ekaterina Dimitrova as the next PMC Chair for our community! Ekaterina has been part of our community for many years and has been a great champion of our community. She takes over from Dinesh Joshi, whom we thank for all his service the past year.
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Apache Cassandra® @cassandra.apache.org · 17/09/2025
Vote passes to include CEP-54 🥳 ZSTD with Dictionary SSTable Compression Adding dictionary support to ZSTD can further improve both metrics, yielding 3–4x improvements in certain workloads. cwiki.apache.org/confluence/d...
CEP-54 wiki page screenshot
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Apache Cassandra® @cassandra.apache.org · 15/09/2025
Serban Teodorescu presenting Efficient export with Cassandra Analytics www.communityovercode.org – Minneapolis
Serban Teodorescu presenting – How it startedOptions for import/exportSidecar overviewCassandra Analytics
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Apache Cassandra® @cassandra.apache.org · 15/09/2025
Gokul Prabagaren from CapitalOne presenting Life is better, since we choose right keys for Cassandra Home www.communityovercode.org – Minneapolis
intro slide from GokulWhy it matters to CapitalOne
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Apache Cassandra® @cassandra.apache.org · 15/09/2025
Bernardo Botella Corbi presenting Handling Large Blobs in Apache Cassandra CDC with Kafka and Object www.communityovercode.org – Minneapolis
Bernardo Botella Corbi presentingComposableDesializertimelinecall to action
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Apache Cassandra® @cassandra.apache.org · 15/09/2025
Josh McKenzie presenting Cassandra as a Cloud-Native System of Record: Unlocking the Big Data Ecosystem with Modular APIs www.communityovercode.org – Minneapolis
intro slideToday's Architectural Isolationism
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Apache Cassandra® @cassandra.apache.org · 15/09/2025
Johnny Miller's lightning talk on Async Python Integration with Apache Cassandra www.communityovercode.org – Minneapolis
Understanding Asyncio in Python
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Apache Cassandra® @cassandra.apache.org · 14/09/2025
Saranya Krishnakumar and Francisco Guerrero presenting The Road Ahead: Next steps for Cassandra Sidecar post v0.1 www.communityovercode.org – Minneapolis
intro slideRBACkey features
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Apache Cassandra® @cassandra.apache.org · 14/09/2025
Bernardo Botella Corbi presenting Apache Cassandra Constraints this is CEP-42, more info on it here: cwiki.apache.org/confluence/d... www.communityovercode.org – Minneapolis
Bernardo Botella Corbi presenting
Apache Cassandra Constraints
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Apache Cassandra® @cassandra.apache.org · 14/09/2025
Aaron Ploetz presenting on backups made easy with Medusa and Kubernetes
Aaron's intro slide
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Apache Cassandra® @cassandra.apache.org · 14/09/2025
Caleb Rackliffe presenting Mastering Storage Attached Indexes: Transforming Cassandra Data Modeling
Mastering SAI intro slideSelectivity Matters slide
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Apache Cassandra® @cassandra.apache.org · 14/09/2025
Andres Beck-Ruiz and William Nguyen presenting Performance Improvements & Upgrade Challenges: Bloomberg’s Road to Apache Cassandra 5.0 www.communityovercode.org– Minneapolis
Andres Beck-Ruiz and William Nguyen
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Apache Cassandra® @cassandra.apache.org · 14/09/2025
Join us at Community over Code's Cassandra Track, Sun Sept 14th for How Cassandra Empower AI and Knowledge Graph Storage with Scale Yichen Wei www.communityovercode.org– Minneapolis, Minnesota, USA, September 11-14
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Apache Cassandra® @cassandra.apache.org · 14/09/2025
Join us at Community over Code's Cassandra Track, Sun Sept 14th for Life is better, Since we choose right keys for Cassandra Home Gokul Prabagaren www.communityovercode.org– Minneapolis, Minnesota, USA, September 11-14
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Apache Cassandra® @cassandra.apache.org · 13/09/2025
Ariel Weisberg presenting "Living with Accord"
migration -> Accord (full) phases
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Apache Cassandra® @cassandra.apache.org · 13/09/2025
@taco.cat presenting "Witness Replicas: Reducing Storage Costs in Apache Cassandra" Saving 1/3 on storage, cpu and IO, is some serious spare change.
Scott presentingTarget Outcomes
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Apache Cassandra® @cassandra.apache.org · 13/09/2025
Running Apache Cassandra in Kubernetes: hands on with K8ssandra by Alexander Dejanovski and Michael Burman
Alexander Dejanovski presenting
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Apache Cassandra® @cassandra.apache.org · 13/09/2025
Learn from the best… "Contributing to Cassandra: Journeys from Newcomer to PMC" with Cheng Wang, Dinesh Joshi, Ekaterina Dimitrova, Bernardo Botella Corbi, Jordan West www.communityovercode.org – Minneapolis
Cheng Wang, Dinesh Joshi, Ekaterina Dimitrova, Bernardo Botella Corbi, Jordan West
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