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Philipp Krenn

@xeraa.net
40 followers 29 following 351 posts

🎩 of DevRel & Developer 🥑 at Elastic — posts about Elasticsearch, Kibana, search, observability, security

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Philipp Krenn @xeraa.net · 15/09/2026
6,000,000,000 downloads of elasticsearch, kibana, logstash, beats, elastic agent to everyone who downloaded it, built on it, contributed to it, deployed it, broke it, fixed it, and made something amazing with it: thank you
6B downloads of the ELK
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Philipp Krenn @xeraa.net · 03/09/2026
after all the attention for duckdb's acquisition by AWS: one of my favorite things is their "why @duckdb.org" page — duckdb.org/why_duckdb explainining their tradeoffs and goals; and how they try to achieve those through technical means
duckdb
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Philipp Krenn @xeraa.net · 02/09/2026
full article with examples how not to do it in various programming languages: bonsai.io/blog/float-b... 3/3
bonsai.io
Float Bloat: vector serialization gone wrong
Your embeddings are float32. Somewhere in your app they get promoted to float64 and grow a tail of digits that mean nothing. You pay to store, ship, and parse every one of them.
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Philipp Krenn @xeraa.net · 02/09/2026
* `semantic_text generates` the embeddings server-side and has always avoided the problem and for even more optimized ingestion, use base64 encoded strings: www.elastic.co/search-labs/... 2/3
elastic.co
Using Base64-encoded strings to speed up vector ingestion
Learn about Base64-encoded strings and the improvements it brings to vector ingestion in Elasticsearch.
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Philipp Krenn @xeraa.net · 02/09/2026
"Float Bloat: vector serialization gone wrong" by storing float64 instead of float32. it's a surprising problem but with elasticsearch you're in luck: * since 9.2 (index creation) `index.mapping.exclude_source_vectors` is on by default — you don't store the floats in source at all any more 1/3
float bloat
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Philipp Krenn @xeraa.net · 23/08/2026
static.klipy.com
Yoda's Pain, Suffering, and Death Meme
ALT: Yoda's Pain, Suffering, and Death Meme
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Philipp Krenn @xeraa.net · 23/08/2026
hacking a tablet that was EOLed by amazon: "American frontier models won’t help and Chinese will, but not without reasoning about whether they should" the barrier is to pick the right model, say "keep going" over and over, and paying the token costs: ericpardee.github.io/fire-hd-owne...
ericpardee.github.io
Amazon kept shutting down my tablet, so I spent $266 on four AI models to own it
Owning a tablet Amazon kept shutting down: CVE-2022-38181, four AI models, five months
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Philipp Krenn @xeraa.net · 20/08/2026
hacktoberfest is back: hacktoberfest.com but not as open source contributions but instead as a series of events; maybe not too surprising now that MLH is the main driver sad to see for open source in general. but probably the saner version for maintainers #sloptoberfest
hacktoberfest.com
Hacktoberfest 2026 | AI belongs to everyone
300+ in-person Fests plus a global online event, all about building with open source AI. Join a Fest near you this October.
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Philipp Krenn @xeraa.net · 19/08/2026
first hack night in the new @elastic.co san francisco office together with mastra tomorrow: build and compete on prices with agent memory already at 250 RSVP but thanks to the new space we can squeeze in a few more: luma.com/mastra-hack 🤞 for tomorrow
video wall
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Philipp Krenn @xeraa.net · 10/08/2026
current state of job offers — without wanting to imply anything 😂 unless it's a hack to get all the attention for this job
🫠
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Philipp Krenn @xeraa.net · 17/07/2026
we caught a fake coding interview to steal your developer credentials on the @elastic.co community slack. be extra careful with anyone DMing you files to download and run full analysis: www.elastic.co/security-lab...
slack
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Philipp Krenn @xeraa.net · 22/06/2026
what a silly game 😅
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Philipp Krenn @xeraa.net · 22/06/2026
are you in the weights? it's the new klout also works for products (though reluctantly) #elasticsearch intheweights.com
elasticsearch
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Philipp Krenn @xeraa.net · 14/04/2026
more cursor skills in the wild — here and everywhere else. spin up an elasticsearch cluster, manage kibana, configure security, set up OTel,... and almost hidden under it is also the brand new MCP endpoint for the @elastic.co docs cursor.com/marketplace/...
https://cursor.com/marketplace/elastic
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Philipp Krenn @xeraa.net · 09/04/2026
> BERT-based learned sparse and multi-vector dense retrievers generalise better than LLM-based single-vector dense retrievers; and re-ranking remains highly effective BM25 just keeps hanging on with lots more in this new paper: arxiv.org/pdf/2602.21456
arxiv.org
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Philipp Krenn @xeraa.net · 09/04/2026
BM25: "why won't you die?!" > the lexical retriever BM25 with appropriate setup outperforms neural rankers in most cases; notably, gpt-oss-20b with BM25 on the passage corpus achieves the highest answer accuracy across all retrieval settings in our study;
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Philipp Krenn @xeraa.net · 02/04/2026
is it an API key for a cloud account or the cluster? way too common of a confusion. so why not both?! released today for serverless projects and your @elastic.co cloud account PS: please be extra careful in your day to day use with these. they have an extra wide blast radius 💥
API key
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Philipp Krenn @xeraa.net · 31/03/2026
someone woke up at RSA and chose violence: vibecoded.vc/cooked/ 😂 though it is entertaining (and I won't agree on all of the takes ;) )
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Philipp Krenn @xeraa.net · 16/03/2026
powered by CAGRA (graph-based ANN algorithm built to run natively on GPUs) that still works with CPUs for search full post: www.elastic.co/blog/elastic... and find us at GTC — we have a booth and I'll be around today and tomorrow PS: yeah, a lot of acronyms
elastic.co
Elastic and NVIDIA together unlock next generation enterprise AI search
Elastic vector indexing with NVIDIA cuVS GPU acceleration eliminates a critical barrier to successful enterprise-scale AI deployments, enabling organizations to vectorize massive volumes of unstructur...
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Philipp Krenn @xeraa.net · 16/03/2026
obligatory GTC keynote tweet when you make the top slides: building HNSW graphs with up to 12x the throughput and 7x faster merges on elasticsearch and NVIDIA cuVS (a GPU-accelerated library for vector search)
keynoteindexing
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Philipp Krenn @xeraa.net · 16/03/2026
nvidia GTC where every second word (spoken and on booths) is AI, agent, or token 😬 PS: who else is around?
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Philipp Krenn @xeraa.net · 11/03/2026
BM25 for "sparse visual-word activations"? arxiv.org/abs/2603.05781 BM25 just refuses to disappear or even take the back set for retrieval
paper
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Philipp Krenn @xeraa.net · 09/03/2026
soon... and there's already the .md version for every elastic docs page and you can download the full docs as MD in a ZIP file too
mcp inspector
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Philipp Krenn @xeraa.net · 07/03/2026
the irony on the vibecoding subreddit
reddit
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Philipp Krenn @xeraa.net · 06/03/2026
but isn‘t this done more strictly in practice (to keep the legal risk minimal)? lots of little hacks here and there but bigger orgs seem to have higher standards, no?
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Philipp Krenn @xeraa.net · 01/03/2026
outage scenario: electricity turned off because of a drone / rocket attack ongoing updates: health.aws.amazon.com/health/status
UAE
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Philipp Krenn @xeraa.net · 27/02/2026
overview on amplifying.ai/research/cla... with a deep dive in amplifying.ai/research/cla... 5/5
amplifying.ai
Amplifying — AI Benchmark Research
Systematic analysis of how AI systems make decisions — from product recommendations to developer tool choices.
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Philipp Krenn @xeraa.net · 27/02/2026
models have personalities in their recommendations and how conservative or cutting edge they are — massive differences even within a close "family" 4/5
models splitpersonalities
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Philipp Krenn @xeraa.net · 27/02/2026
new defaults — some general and some language specific (the report is very JS and python focused) 3/5
default stackdefaults
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Philipp Krenn @xeraa.net · 27/02/2026
depending on the area, there is a clear bias towards building vs buying feature toggles as a full blown company were always a weird choice... 2/5
build vs buy
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Philipp Krenn @xeraa.net · 27/02/2026
*claude code is the new gatekeeper* fascinating report on the choices claude makes, build vs buy, the personality of different models, and who is winning / losing 1/5 PS: when creating code is cheap, the new moat is distribution
article
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Philipp Krenn @xeraa.net · 25/02/2026
4x performance improvement by upgrading from #elasticsearch 8 to 9. "this one weird trick your cloud provider / hardware vendor hates" 😉 medium.com/trendyol-tec... PS: I have a hunch what made the difference here
overviewlatencyconclusion
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Philipp Krenn @xeraa.net · 19/02/2026
full announcement blog post: jina.ai/news/jina-em... hugging face: huggingface.co/collections/... paper for even more details: arxiv.org/abs/2602.15547
jina.ai
jina-embeddings-v5-text: New SOTA Small Multilingual Embeddings
Two sub-1B multilingual embeddings with best-in-class performance, available on Elastic Inference Service, Llama.cpp and MLX.
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Philipp Krenn @xeraa.net · 19/02/2026
2 new #jina models have entered the embedding arena — v5 multilingual: * small: 1024 dim, 32K context * nano: 768 dim, 8K context both support matryoshka dimension truncation (32+) and are at the top of current benchmarks — especially for their parameter size publicly accessible (non-commercial)
overviewmultilingualenglishretrieval
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Philipp Krenn @xeraa.net · 19/02/2026
gandalf prompt injection is still fun: gandalf.lakera.ai/gandalf 🧙‍♂️ though almost disappointing if one prompt takes you through multiple levels (🇦🇹)
gandalf.lakera.ai
Gandalf | Lakera – Test your AI hacking skills
Trick Gandalf into revealing information and experience the limitations of large language models firsthand.
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Philipp Krenn @xeraa.net · 13/02/2026
media.tenor.com
a man with the words well that escalated quickly written on his face
ALT: a man with the words well that escalated quickly written on his face
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Philipp Krenn @xeraa.net · 13/02/2026
* OpenClaw agent opening a PR on matplotlib * reviewer rejects it per the repo's policies * agent replies with a personal attack github.com/matplotlib/m...
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Philipp Krenn @xeraa.net · 12/02/2026
* different views per solution and you can filter by version or other labels `label:"v9.3.0"` * the underlying issue describes what it does, for who, and the value proposition take a look on github.com/orgs/elastic... comments are currently disabled but let us know if that's a deal-breaker 2/2
details
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Philipp Krenn @xeraa.net · 12/02/2026
new public #elastic roadmap: * covering key initiatives like ES|QL, better dashboards,... * recently shipped features (those are our fiscal quarters) * upcoming features as in-progress, near-term, and mid-term 1/2
overviewfuture
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Philipp Krenn @xeraa.net · 08/02/2026
catching up on the search dev room at #FOSDEM: lots of good stuff on fosdem.org/2026/schedul... glad we (or carly richmond) could put this together again. this won't be the last one. PS: given our colorful past, it's especially great to be back at FOSDEM pushing the search dev room and OSS :)
scheduleroom 1room 2
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Philipp Krenn @xeraa.net · 21/01/2026
come on, do something
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Philipp Krenn @xeraa.net · 19/01/2026
targeted billing emails work 😬
alertusage
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Philipp Krenn @xeraa.net · 17/01/2026
PS: notebooklm.google.com is great to make this easier and more approachable
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Philipp Krenn @xeraa.net · 17/01/2026
jina-clip-v2 uses a multi-task, multi-stage contrastive learning strategy to align multilingual text and image representations to work well at both cross-modal and text-only retrieval. it excels at visually rich documents while flexibly truncating embedding dimensions arxiv.org/abs/2412.08802
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Philipp Krenn @xeraa.net · 17/01/2026
ReaderLM-v2 uses a new three-stage data synthesis pipeline called "draft-refine-critique" alongside a unified training framework to transform messy HTML into structured data, making it a highly effective tool that outperforms much larger models on web content extraction arxiv.org/pdf/2503.01151
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Philipp Krenn @xeraa.net · 17/01/2026
jina-embeddings-v4 works by projecting text & images into a shared semantic space using a unified Qwen2.5-VL backbone and task-specific LoRA adapters, which minimizes the modality gap and enables SOTA retrieval of visually rich documents via single- and multi-vector outputs arxiv.org/abs/2506.18902
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Philipp Krenn @xeraa.net · 17/01/2026
using a compact autoregressive backbone pre-trained on text and code, along with task-specific instruction prefixes and last-token pooling, jina-code-embeddings generates high-quality embeddings that achieve state-of-the-art performance competitive with much larger models arxiv.org/abs/2508.21290
arxiv.org
Efficient Code Embeddings from Code Generation Models
jina-code-embeddings is a novel code embedding model suite designed to retrieve code from natural language queries, perform technical question-answering, and identify semantically similar code snippet...
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Philipp Krenn @xeraa.net · 17/01/2026
jina-reranker-v3 uses a new "last but not late" interaction strategy that processes the query and multiple documents simultaneously in a single shared context window, allowing it to capture cross-document and query-document relationships with its compact 0.6B parameter model arxiv.org/abs/2509.25085
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Philipp Krenn @xeraa.net · 17/01/2026
long US weekend — great time to catch up on some @JinaAI_ papers about rerankers and code / multilingual / multimodal embeddings: * jina-reranker-v3 * jina-code-embeddings * jina-embeddings-v4 * ReaderLM-v2 * jina-clip-v2
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Philipp Krenn @xeraa.net · 15/01/2026
san francisco in january (downtown / FiDi)
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