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ClickHouse Cloud Executable UDFs GA: Native Code, Network Access, and Query-Level Metrics

LLM observability has a data problem hiding inside a measurement problem. Teams collect prompts, completions, model names, latency, and trace identifiers, but token-usage fields are not always present

4 min readaidatalegends.hashnode.dev

Rita LopesOct 7

What If You Didn't Have to Migrate to Gigapipe to Find Out If It's Better?

Dual-shipping OpenTelemetry is the safest way to test a new backend before migrating. Here's what the overlap costs — and why it just got cheap.

9 min readblog.gigapipe.com

VisuaLeaf - MongoDB Data WorkspaceOct 5

ClickHouse Database Management - Tables, SQL, and Schemas

Browse ClickHouse tables, inspect DDL, run analytical SQL, map logical relationships, create charts, and export data to Excel with VisuaLeaf.

7 min readvisualeaf.hashnode.dev

A AdarshSep 10

Pre-aggregation gets you 100× — until someone applies a filter

A cube makes some questions instant and a larger set unanswerable. Design for the boundary.

6 min readadarshgowda.hashnode.dev

A AdarshAug 20

One database is a cost, not a simplification

Two workloads, opposite requirements. Four reasons a column store is wrong for a mutable catalog — and the join argument worth taking seriously.

7 min readadarshgowda.hashnode.dev

Manu ShuklaJul 27

Real-time analytics in 2026: Lakehouse//RT vs ClickHouse, Druid and Pinot

Real-time analytics in 2026: Lakehouse//RT vs ClickHouse, Druid and Pinot Summary. On 16 June 2026 Databricks launched Lakehouse//RT, a real-time query engine (code-named Reyden) that Databricks says

15 min readecorpit.hashnode.dev

OtezVikentiyJul 24

My idle ClickHouse was merging 11 million rows every 30 seconds

Why a stock ClickHouse filled 12 GB of 20 with 543 KB of my data, how merge amplification hit 1:678, and what tuning gave back: memory -66%.

7 min readbuildinggotcha.hashnode.dev

Jeremy LongshoreJul 20

A Green Recovery Drill Can Still Be Lying

We had a backup mechanism for a SigNoz staging stack. What we did not have was a proven restore. Those are different claims, and the gap between them is where outages become permanent. SigNoz is open-

10 min readjeremylongshore.hashnode.dev

Artem SenenkoJun 30

Building an uptime monitor in Rust: one binary, two databases, 130K checks/sec per core

A build story. How Uptimepage runs HTTP/TCP/DNS/TLS checks from multiple regions on a single Rust binary backed by Postgres and ClickHouse.

9 min readuptimepage.hashnode.dev

Ashmit JaiSarita GuptaJun 28

Building log0: a multi-tenant incident platform on Kafka

A working incident-management backend, built solo on one laptop, explained from the first measured number to the last honest caveat. This post is the map for the whole series.

10 min readengineeringwithashmit.hashnode.dev

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