Open Source Engineer Director at @Aiven_io working in #opensource, formerly at @springernature and @Gameduell.
Berlin
Joined October 2011
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Josep Prat retweeted
Small bird, fast wings, Kolibri is here.
78B parameters. 3.46B active. Up to 1M tokens of context. Built in Europe.
Now the weights are yours. Run it on your own hardware, under Apache 2.0.
Josep Prat retweeted
Never lose KRaft quorum. Until you do.
Lose 2 of 3 voters and the metadata log freezes. AddRaftVoter can't fix it: removing dead voters needs the quorum you lost.
The loop:
➡️Demote lost voters → commit a membership change
➡️Commit anything → need quorum
↩️Get quorum → remove lost voters
Stock RPCs refuse, correctly. Raft requires a majority for a reason.
Recovery:
1️⃣Find the longest __cluster_metadata log (brokers count)
2️⃣Stop controllers
3️⃣Offline-append VotersRecord, demoting every other voter
4️⃣Start that one controller as sole voter
5️⃣Add replacements via normal online changes
This restores availability, not integrity. Whatever lived only on the lost disks is gone, so we page a human instead of automating it.
Upstream KIP-1347 covers stale voter endpoints, not lost voters.
Write-up: aiven.io/blog/kafka-never-lo…
Josep Prat retweeted
alibaba/open-code-review: Battle-tested at Alibaba's scale. Hybrid architecture code review tool: deterministic pipelines + LLM Agent, precise line-level comments, built-in fine-tuned ruleset (NPE, thread-safety, XSS, SQL injection), OpenAI & Anthropic compatible. #devopsish github.com/alibaba/open-code…
Josep Prat retweeted
New to Apache Kafka® and wondering if it's the right tool for you?
Start with Kafka 101: a full walkthrough of core Kafka principles, getting a cluster running and your first messages flowing.
Watch the recording now: youtu.be/fGD8sNbEVFU
Josep Prat retweeted
Dima Kan, leading search here at Aiven, came for the startup pace and got it right away.
Hear about how he approaches leading his team through change, and about how he made a hands-on impact in his first week.
Read the full blogpost: aiven.io/blog/build-the-futu…
Josep Prat retweeted
Oracle has opened governance for MySQL, and AWS is thrilled to be part of it. We are contributing upstream to performance, vector search, and the extensions framework. It's the same approach we've taken with OpenJDK, Valkey, and dozens of other projects: do the work and make the software better for everyone.
Learn more: go.aws/4xUys3s
#OpenSource #AWS #MySQL
Josep Prat retweeted
We removed an LM's ability to speak German by fine-tuning on only 4 German tokens.
As part of a 1-day hackathon with our product Silico, we removed a 67M-parameter language model's ability to predict German text, by tuning only a scalar factor on one subcomponent of the weights. (1/6)
Josep Prat retweeted
As a result of a US government directive, we are suspending access to Claude Fable 5 for all users. You can continue to use all other Claude models.
Here’s what this means for you:
Across Claude products, new sessions will run on your selected default model or Opus 4.8, and existing Fable 5 sessions will end with an error.
On the Claude Platform, requests to Fable 5 will also return an error. Please update your integrations to other Claude models.
We know this is a disruption to your workflows; we appreciate your patience and support.
The US government, citing national security authorities, has issued an export control directive to suspend all access to Fable 5 and Mythos 5 by any foreign national, whether inside or outside the United States, including foreign national Anthropic employees.
The net effect of this order is that we must abruptly disable Fable 5 and Mythos 5 for all our customers to ensure compliance.
Access to all other Claude models is not affected.
We apologize for this disruption to our customers. We believe this is a misunderstanding and are working to restore access as soon as possible.
Read our full statement: anthropic.com/news/fable-myt…
Josep Prat retweeted
Inkless keeps expanding.
After launching on GCP recently, we’re excited to bring Inkless to Azure, making it even easier to get started without BYOC. Spin up Inkless services on Azure in just a few clicks and focus on building. Learn more: aiven.io/inkless?utm_source=…
#Aiven #Inkless #MicrosoftAzure #Cloud #DevTools
Josep Prat retweeted
Following our announcement a couple of weeks a go with Inkless Clusters being on Aiven Cloud. We're happy to share that Inkless is now live on GCP.
This means that users can now create new Inkless services on GCP, without requiring to be on BYOC. Learn more here: aiven.io/inkless?utm_source=…
Josep Prat retweeted
KIP-1150: Diskless Topics has been officially approved for Apache Kafka.
It enables storage and compute separation by writing messages directly to object storage (S3, GCS, Azure Blob), with broker disks acting as optional caches. A big step toward a more cloud-native Kafka architecture. Read more: aiven.io/blog/kip-1150-accep…
#ApacheKafka #StreamingData #CloudNative #DistributedSystems #DataInfrastructure
Josep Prat retweeted
Benchmarking Diskless Topics after launching Inkless on BYOC: 144 producers + 144 consumers, 1 GiB/s in + 3 GiB/s out across 3 AZs.
Spoiler: ~1s latency for ~94% lower cost.
Read the full report here: aiven.io/blog/benchmarking-d…
Josep Prat retweeted
🚨 So after 21 years of career, it finally happen, I have been let go from my company, in fact the complete marketing team has been let go ... It came really as a complete surprise, I was not expecting that at all since they were super happy with and the significant impact I had. Also the company is doing really well ...
But it's life, it's not easy, I'm recovering slowly and I'm already looking for my next adventure.
So if you are looking for a experienced IT professional with expertise going from advocacy (community, pre-sales & customers) to Java, with a lot of knowledge and opinions on Platform Engineering/k8s ecosystem and how all of this can be infused with AI, don't hesitate to ping me. Remote EMEA
Also don't hesitate to RT this post.
Love you all, my network of friends has already been beyond awesome helping when I told them in private last week.
Josep Prat retweeted
Listen to The Ravit Show on Spotify for Creators open.spotify.com/episode/0W7…
@jlprat @VervericaData @FlinkForward @aiven_io
Josep Prat retweeted
Aiven Inkless Cloud BYOC is GA: a multi-modal cloud streaming service for Apache Kafka, helping teams running clusters ≲1 MB/s cut complexity and cost. It unifies KRaft, Diskless Topics, and Tiered Storage into a single elastic, open-source API. #Kafka
aiven.io/blog/apache-kafkas-…
Speaking in #Barcelona is always special for me! And tomorrow, Wednesday 15th I'll be presenting at Flink Forward Barcelona.
Join me and Igor Kersic to hear about The Future of Streaming with @VervericaData and @aiven_io.
Come by and say hello.
Josep Prat retweeted
🚨Kafka Streams 4.1.0 contains a memory leak regression bug: issues.apache.org/jira/brows…
Be careful upgrading, or wait for 4.1.1 bug-fix release. We plan to get it out quickly.
