Philipp Krenn
@xeraa.net
🎩 of DevRel & Developer 🥑 at Elastic — posts about Elasticsearch, Kibana, search, observability, security
back at home to upset the neighbors: mr 🐿️ was not pleased by my presence — only wants nuts unobserved
December 28, 2025 at 11:05 AM
back at home to upset the neighbors: mr 🐿️ was not pleased by my presence — only wants nuts unobserved
how to clean up an ancient (8 years!) #elasticsearch cluster with MCP + #claude: frutik.medium.com/robots-vs-zo...
PS: not being able to delete indices might be a bit of a feature
PS: not being able to delete indices might be a bit of a feature
December 25, 2025 at 10:00 PM
how to clean up an ancient (8 years!) #elasticsearch cluster with MCP + #claude: frutik.medium.com/robots-vs-zo...
PS: not being able to delete indices might be a bit of a feature
PS: not being able to delete indices might be a bit of a feature
final friday elky of the year — already in the well rounded holiday version 😀
I‘m off to europe for a bit now
I‘m off to europe for a bit now
December 20, 2025 at 1:42 AM
final friday elky of the year — already in the well rounded holiday version 😀
I‘m off to europe for a bit now
I‘m off to europe for a bit now
latest malware benchmarks from www.av-comparatives.org/tests/busine...
PS: still surprised to see elastic in the list and how well we're doing — caught everything in 2025
PS: still surprised to see elastic in the list and how well we're doing — caught everything in 2025
December 18, 2025 at 3:21 AM
latest malware benchmarks from www.av-comparatives.org/tests/busine...
PS: still surprised to see elastic in the list and how well we're doing — caught everything in 2025
PS: still surprised to see elastic in the list and how well we're doing — caught everything in 2025
finally got some billing alerts in @elastic.co cloud
less relevant with static setups. much more relevant with #serverless projects — don't judge all the projects running here
docs in www.elastic.co/docs/deploy-...
with more options to come — I'd love to see billing groups and flexible thresholds
less relevant with static setups. much more relevant with #serverless projects — don't judge all the projects running here
docs in www.elastic.co/docs/deploy-...
with more options to come — I'd love to see billing groups and flexible thresholds
December 16, 2025 at 11:13 PM
finally got some billing alerts in @elastic.co cloud
less relevant with static setups. much more relevant with #serverless projects — don't judge all the projects running here
docs in www.elastic.co/docs/deploy-...
with more options to come — I'd love to see billing groups and flexible thresholds
less relevant with static setups. much more relevant with #serverless projects — don't judge all the projects running here
docs in www.elastic.co/docs/deploy-...
with more options to come — I'd love to see billing groups and flexible thresholds
is it time to move to lobste.rs?
the amount of LLM slop, astroturfing, sock puppeting,... in open channels is starting to get really annoying
the amount of LLM slop, astroturfing, sock puppeting,... in open channels is starting to get really annoying
December 16, 2025 at 11:00 AM
is it time to move to lobste.rs?
the amount of LLM slop, astroturfing, sock puppeting,... in open channels is starting to get really annoying
the amount of LLM slop, astroturfing, sock puppeting,... in open channels is starting to get really annoying
TIL about #zswap "a compressed write-back cache for swapped pages, as a form of virtual memory compression". this will hopefully came in handy soon for performance :)
also there are zram and zcache (askubuntu.com/a/472227 has a comparison)
also there are zram and zcache (askubuntu.com/a/472227 has a comparison)
zram vs zswap vs zcache Ultimate guide: when to use which one
What the hell are they? How are they different (I've written my understanding in an answer below)
In the Zswap system, when a page is evicted from the zswap to the actual swap is it stored in a
askubuntu.com
December 15, 2025 at 4:58 AM
TIL about #zswap "a compressed write-back cache for swapped pages, as a form of virtual memory compression". this will hopefully came in handy soon for performance :)
also there are zram and zcache (askubuntu.com/a/472227 has a comparison)
also there are zram and zcache (askubuntu.com/a/472227 has a comparison)
riding into the christmas season #elkOnTheShelf
December 13, 2025 at 1:35 AM
riding into the christmas season #elkOnTheShelf
I spy a @jina.ai model on @elastic.co cloud 🙃
December 13, 2025 at 1:20 AM
I spy a @jina.ai model on @elastic.co cloud 🙃
small native macOS GUI client for Elasticsearch — on the app store
quick peek and where I think it fits between kibana and cURL / postman / ...
quick peek and where I think it fits between kibana and cURL / postman / ...
December 11, 2025 at 10:35 PM
small native macOS GUI client for Elasticsearch — on the app store
quick peek and where I think it fits between kibana and cURL / postman / ...
quick peek and where I think it fits between kibana and cURL / postman / ...
TIL about pyinfra — ansible but python instead of yaml and a lot faster
I'd be interested in faster but I'm not sure I see the full advantage in python; at least not for the simple examples they show
I'd be interested in faster but I'm not sure I see the full advantage in python; at least not for the simple examples they show
December 11, 2025 at 3:17 AM
TIL about pyinfra — ansible but python instead of yaml and a lot faster
I'd be interested in faster but I'm not sure I see the full advantage in python; at least not for the simple examples they show
I'd be interested in faster but I'm not sure I see the full advantage in python; at least not for the simple examples they show
scoring rubric of #KubeCon: content, originality, relevance, speakers, not-a-product-pitch. and no obvious LLM abstracts. sounds widely applicable
events.linuxfoundation.org/kubecon-clou...
events.linuxfoundation.org/kubecon-clou...
December 10, 2025 at 7:32 PM
scoring rubric of #KubeCon: content, originality, relevance, speakers, not-a-product-pitch. and no obvious LLM abstracts. sounds widely applicable
events.linuxfoundation.org/kubecon-clou...
events.linuxfoundation.org/kubecon-clou...
fizzy advertising itself as open source — no huge shitstorm yet. maybe it's different for new code-bases
PS: sane choice and a lot of similarities to the elastic license 😅
PS: sane choice and a lot of similarities to the elastic license 😅
December 9, 2025 at 11:24 PM
fizzy advertising itself as open source — no huge shitstorm yet. maybe it's different for new code-bases
PS: sane choice and a lot of similarities to the elastic license 😅
PS: sane choice and a lot of similarities to the elastic license 😅
Agentic AI Foundation (AAIF) bringing MCP, AGENTS.md, and goose to an open foundation with OpenAI, Anthropic, and many more: aaif.io/press/linux-...
and yes, it was a mad last-minute rush to join 😉
and yes, it was a mad last-minute rush to join 😉
December 9, 2025 at 7:16 PM
Agentic AI Foundation (AAIF) bringing MCP, AGENTS.md, and goose to an open foundation with OpenAI, Anthropic, and many more: aaif.io/press/linux-...
and yes, it was a mad last-minute rush to join 😉
and yes, it was a mad last-minute rush to join 😉
detox after re:invent / las vegas: angel‘s landing at sunset
December 7, 2025 at 3:02 AM
detox after re:invent / las vegas: angel‘s landing at sunset
side job of the day: making fully monitored coffees at #AWSreInvent
making developer dreams come true 😂
PS: dashboards are public on ela.st/beans-streams
making developer dreams come true 😂
PS: dashboards are public on ela.st/beans-streams
December 3, 2025 at 4:36 PM
side job of the day: making fully monitored coffees at #AWSreInvent
making developer dreams come true 😂
PS: dashboards are public on ela.st/beans-streams
making developer dreams come true 😂
PS: dashboards are public on ela.st/beans-streams
hierarchy of (LLM coding( leverage): how CLAUDE md > specification > research > plan > code
and how to write a good CLAUDE md — but keep it short
www.humanlayer.dev/blog/writing...
and how to write a good CLAUDE md — but keep it short
www.humanlayer.dev/blog/writing...
December 3, 2025 at 3:37 AM
hierarchy of (LLM coding( leverage): how CLAUDE md > specification > research > plan > code
and how to write a good CLAUDE md — but keep it short
www.humanlayer.dev/blog/writing...
and how to write a good CLAUDE md — but keep it short
www.humanlayer.dev/blog/writing...
But How Do AI Images and Videos Actually Work?
diffusion models, CLIP, and the papers + math behind it — great weekend video: www.youtube.com/watch?v=iv-5...
diffusion models, CLIP, and the papers + math behind it — great weekend video: www.youtube.com/watch?v=iv-5...
November 24, 2025 at 3:09 AM
But How Do AI Images and Videos Actually Work?
diffusion models, CLIP, and the papers + math behind it — great weekend video: www.youtube.com/watch?v=iv-5...
diffusion models, CLIP, and the papers + math behind it — great weekend video: www.youtube.com/watch?v=iv-5...
November 22, 2025 at 1:20 AM
european bureaucracy: it "only" took 2.5 years to get a delayed flight paid out. and after all the costs (including a laywer) you only get 50%. but I'll still take the win 😉
PS: and I have an even older claim still under negotiations 🫠
PS: and I have an even older claim still under negotiations 🫠
November 19, 2025 at 6:55 PM
european bureaucracy: it "only" took 2.5 years to get a delayed flight paid out. and after all the costs (including a laywer) you only get 50%. but I'll still take the win 😉
PS: and I have an even older claim still under negotiations 🫠
PS: and I have an even older claim still under negotiations 🫠
what's the story with langchain vs langgraph?
I thought the focus was switching over to langgraph but the contributions for langchain seem to have taken over again
I thought the focus was switching over to langgraph but the contributions for langchain seem to have taken over again
November 17, 2025 at 4:47 AM
what's the story with langchain vs langgraph?
I thought the focus was switching over to langgraph but the contributions for langchain seem to have taken over again
I thought the focus was switching over to langgraph but the contributions for langchain seem to have taken over again
how to end the week in the office: give elkie a belly rub
November 15, 2025 at 8:17 AM
how to end the week in the office: give elkie a belly rub
if you're in SF on monday, we'll have a hardware oriented meetup together with microsoft (right at the start of #MSIgnite):
* Bad AI In A Box (BAIIAB) — making AI touch grass
* monitor our coffee consumption — live debug coffee from across the world. and we'll hand out excellent coffee as a demo
* Bad AI In A Box (BAIIAB) — making AI touch grass
* monitor our coffee consumption — live debug coffee from across the world. and we'll hand out excellent coffee as a demo
November 14, 2025 at 5:50 PM
if you're in SF on monday, we'll have a hardware oriented meetup together with microsoft (right at the start of #MSIgnite):
* Bad AI In A Box (BAIIAB) — making AI touch grass
* monitor our coffee consumption — live debug coffee from across the world. and we'll hand out excellent coffee as a demo
* Bad AI In A Box (BAIIAB) — making AI touch grass
* monitor our coffee consumption — live debug coffee from across the world. and we'll hand out excellent coffee as a demo
while we all love ourselves some ML, sometimes all you need is a little bit of math. great post from one of my colleagues on how to tune your shopping results based on history (with a function score)
alexmarquardt.com/personalizin...
alexmarquardt.com/personalizin...
November 12, 2025 at 7:35 AM
while we all love ourselves some ML, sometimes all you need is a little bit of math. great post from one of my colleagues on how to tune your shopping results based on history (with a function score)
alexmarquardt.com/personalizin...
alexmarquardt.com/personalizin...
