Hellmar_Becker

Data enthusiast, father, bookworm. Views are my own.

[Hellmar_Becker @Hellmar_Becker]

Managed to spot the ClickHouse billboard at Shibuya Crossing last night! #SpottedClickHouse @clickhouse-jp #clickhouse-japan

[ClickHouse @ClickHouseDB]

Today is the 25.11 release & community call.

Feature overview, live demos, Q&A.

Will you be there?

https://t.co/X7rVha5s7E

[ClickHouse @ClickHouseDB]

At Netflix, scale drives everything.

Their logging system ingests 5 PB/day, averaging 10M+ events/sec across 40K+ microservices to serve 300M+ subscribers.

See how they did it with some key optimizations in fingerprinting, serialization, and queries.

[Hellmar_Becker @Hellmar_Becker]

View my verified achievement from @ClickHouseDB. https://t.co/r7qRdj315L via @credly

[Confluent @confluentinc]

Real-time analytics just got easier. The fully managed @ClickHouseDB sink connector is now generally available on Confluent Cloud. It’s now simpler than ever to stream data from Apache Kafka® directly into ClickHouse.
Read how it works -> https://t.co/VeUtmV4DGc

[auxten @auxten]

In the end, every byte goes ocean 🌊 ⁦@ClickHouseDB⁩

[Hellmar_Becker @Hellmar_Becker]

@PulpLibrarian Pierf?

[Tanya Bragin @tbragin]

@ClickHouseDB CTO of @ClickHouseDB Alexey Milovidov, shows a mind blowing demo of air traffic telemetry indexed in ClickHouse. 150B+ records and immersive UI to explore it. This is only possible in ClickHouse. https://t.co/tpdvWiVLMO ✈️

[Hellmar_Becker @Hellmar_Becker]

https://t.co/ZRqG8NFi9q

[Hellmar_Becker @Hellmar_Becker]

New blog about visitor segmentation in @ClickHouseDB with theta sketches is out. Link in the reply below

[Jack Vanlightly @vanlightly]

New distributed systems protocol write-up!

Virtual Consensus (Delos) heavily inspired the new architecture in Confluent’s Kora engine, powering Freight Clusters. This write-up dives into Virtual Consensus in Delos paper and why it makes sense as the default log replication protocol in the era of object storage and hybrid environments.

https://t.co/PL7AHPKDrY

[Hellmar_Becker @Hellmar_Becker]

Call for Speakers for DDD Europe, EventCentric, Data Mesh Live - 2025 is open on Sessionize and I've just submitted a session! https://t.co/SBOKc8ikgb

[Hellmar_Becker @Hellmar_Becker]

How to aggregate timeseries data in @ClickHouseDB, keeping the latest values per interval
https://t.co/zu8w0d48YK #clickhouse #sql #analytics #rollup

[Hellmar_Becker @Hellmar_Becker]

Linear algebra operators implemented in #ClickHouse #SQL https://t.co/Rb4b2oQSLz

[Hellmar_Becker @Hellmar_Becker]

@AndreaLicata17 Or you force your dimension back to type STRING to get the legacy behavior.

Let me know if you have further questions! 5/5

[Hellmar_Becker @Hellmar_Becker]

@AndreaLicata17 So your SQL would look like this:

SELECT
"__time",
"customer",
"basket",
ARRAY_AGG(LOOKUP("basketItem", 'eshop_sku'))
FROM "eshop_array" CROSS JOIN UNNEST("basket") AS b("basketItem")
GROUP BY 1, 2, 3

4/

[Hellmar_Becker @Hellmar_Becker]

See you on Oct 22!

[Imply @implydata]

Attention @Druidio & @ApacheKafka enthusiasts in the Munich area!

Our event, "Streamline Your Data w/ #Kafka & #Druid: Achieve Real-Time Insights" is Oct 22 w/ @Implydata's @Hellmar_Becker & @Reply_DE's Majid Azimi, hosted by Reply.

Register for free: https://t.co/DWmIPIjOek