Hacker News: moonikakiss

Databricks Acquires Mooncake Labs

moonikakiss — Wed, 01 Oct 2025 14:30:17 +0000

Article URL: https://www.databricks.com/blog/mooncake-labs-joins-databricks-accelerate-vision-lakebase

Comments URL: https://news.ycombinator.com/item?id=45438153

Points: 3

# Comments: 0

Moonlink: Streaming Ingest for Apache Iceberg

moonikakiss — Tue, 19 Aug 2025 16:45:21 +0000

Article URL: https://github.com/Mooncake-Labs/moonlink

Comments URL: https://news.ycombinator.com/item?id=44953540

Points: 1

# Comments: 0

A database kernel engineer's take on Apache Iceberg

moonikakiss — Tue, 05 Aug 2025 16:22:32 +0000

Article URL: https://www.mooncake.dev/blog/iceberg-is-terrible

Comments URL: https://news.ycombinator.com/item?id=44800106

Points: 3

# Comments: 4

How to turn Apache Iceberg into a real-time columnstore?

moonikakiss — Tue, 29 Jul 2025 07:51:53 +0000

Article URL: https://www.mooncake.dev/blog/iceberg-is-terrible

Comments URL: https://news.ycombinator.com/item?id=44720362

Points: 2

# Comments: 0

What if made we Apache Iceberg feel like a RDMS?

moonikakiss — Fri, 25 Jul 2025 02:13:27 +0000

Article URL: https://www.mooncake.dev/blog/iceberg-is-terrible

Comments URL: https://news.ycombinator.com/item?id=44678757

Points: 1

# Comments: 0

Pg_mooncake: Columnstore Mirror of Postgres Tables

moonikakiss — Tue, 22 Jul 2025 15:30:52 +0000

Article URL: https://github.com/Mooncake-Labs/pg_mooncake/releases/tag/v0.1.2

Comments URL: https://news.ycombinator.com/item?id=44648381

Points: 1

# Comments: 0

But, my Postgres (+ lakehouse) is free

moonikakiss — Fri, 20 Jun 2025 19:10:03 +0000

Article URL: https://www.mooncake.dev/blog/postgres-lakehouse-free

Comments URL: https://news.ycombinator.com/item?id=44330942

Points: 2

# Comments: 1

AI-First Law Firm?

moonikakiss — Tue, 17 Jun 2025 16:44:02 +0000

Article URL: https://techcrunch.com/2025/06/17/sequoia-backed-crosby-launches-a-new-kind-of-ai-powered-law-firm/

Comments URL: https://news.ycombinator.com/item?id=44301089

Points: 1

# Comments: 0

But, my Postgres (+Lakehouse) is free

moonikakiss — Fri, 13 Jun 2025 18:49:58 +0000

Article URL: https://www.mooncake.dev/blog/postgres-lakehouse-free

Comments URL: https://news.ycombinator.com/item?id=44271138

Points: 3

# Comments: 0

New comment by moonikakiss in "Builder.ai Collapses: $1.5B 'AI' Startup Exposed as 'Indians'?"

moonikakiss — Wed, 04 Jun 2025 00:16:01 +0000

I did due-diligence on Builder.AI for a venture firm I was interning at (circa 2019). It was extremely apparent (Glassdoor, talking to any employee) it was complete BS.

When I say apparent, it took less than 15 minutes and a couple of google searches to get a sniff of it.

Somehow, you can still raise $500MM ++.

I think about that a lot

ClickStack: A High-Performance OSS Observability Stack on ClickHouse

moonikakiss — Thu, 29 May 2025 23:59:02 +0000

Article URL: https://clickhouse.com/blog/clickstack-a-high-performance-oss-observability-stack-on-clickhouse

Comments URL: https://news.ycombinator.com/item?id=44131521

Points: 3

# Comments: 0

New comment by moonikakiss in "HTAP is Dead"

moonikakiss — Thu, 29 May 2025 03:30:22 +0000

totally agreed on 3. You're also missing the challenges of dealing with updates/deletes; and managing the many small files.

CDC from OLTP to Iceberg is extremely non-trivial.

HTAP is Dead

moonikakiss — Wed, 28 May 2025 22:22:18 +0000

Article URL: https://www.mooncake.dev/blog/htap-is-dead

Comments URL: https://news.ycombinator.com/item?id=44121177

Points: 159

# Comments: 90

Open Data Standards: Postgres, OTEL and Iceberg

moonikakiss — Tue, 27 May 2025 22:17:24 +0000

Article URL: https://supabase.com/blog/open-data-standards-postgres-otel-iceberg

Comments URL: https://news.ycombinator.com/item?id=44111131

Points: 2

# Comments: 0

New comment by moonikakiss in "Migrating to Postgres"

moonikakiss — Thu, 15 May 2025 03:19:36 +0000

yep exactly. we can wait for replay LSN. So you're only reading once all writes to OLTP are complete.

New comment by moonikakiss in "Migrating to Postgres"

moonikakiss — Thu, 15 May 2025 02:20:50 +0000

great point.

with pg_mooncake v0.2 (launching in ~couple weeks), you'll be able to get a columnar copy of your Postgres that's always synced (~~Keep your write path unchanged, and keep your Postgres where it is. Deploy Mooncake as a replica for the columnar queries.~~

New comment by moonikakiss in "Migrating to Postgres"

moonikakiss — Thu, 15 May 2025 02:18:25 +0000

yes you can. Even if the columnar tables are in the read replica. you'll be able to do joins with your OLTP tables

New comment by moonikakiss in "Migrating to Postgres"

moonikakiss — Thu, 15 May 2025 02:17:48 +0000

exactly. we take the CDC output / logical decoding from your OLTP tables and write into a columnar format with ~~We had to design this columnstore to be 'operational' so it can keep up with changing oltp tables (updates/deletes).~~
~~You'll be able to deploy Mooncake as a read-replica regardless of where your Postgres is. Keep the write path unchanged, and query columnar tables from us.~~
~~--- v0.2 will be released in preview in ~a couple weeks. stay tuned!~~

New comment by moonikakiss in "Migrating to Postgres"

moonikakiss — Thu, 15 May 2025 00:25:48 +0000

great blog. It seems like you might benefit from columnar storage in Postgres for that slow query that took ~20seconds.
It's interesting that people typically think of columnstores for strict BI / analytics. But there are so many App / user-facing workloads that actually need it.
ps: we're working on pg_mooncake v0.2. create a columnstore in Postgres that's always consistent with your OLTP tables.
It might help for this workload.

New comment by moonikakiss in "HTAP Databases Are Dead"

moonikakiss — Wed, 14 May 2025 21:43:58 +0000

Even more so after Neon + Databricks.