Hacker News: aynyc

New comment by aynyc in "Ask HN: Are you encountering AI-related questions in the hiring market?"

aynyc — Fri, 10 Apr 2026 12:13:20 +0000

I just came out of an initial interview for a rather senior enterprise position. It was bad. It was bad in a sense that they really didn't know what to do. The senior manager (EVP level person) asked me about LLM for code generation. I told them about my aws kiro-cli experience. They literally asked me to sit down and show them how they can do it. I'm pretty sure they want me to back for another round.

This whole thing reminds me of when I was in school, showing old timers who to use MS Office and VBA.

New comment by aynyc in "Apache Arrow is 10 years old"

aynyc — Fri, 13 Feb 2026 13:48:02 +0000

We might be doing something wrong, but we saw significant performance degradation for both ingestion and query when doing compaction when it comes to finance data during trading hours.

New comment by aynyc in "Apache Arrow is 10 years old"

aynyc — Fri, 13 Feb 2026 13:43:48 +0000

When you say compatibility issues, you mean they are more problematic or less?

It’s pretty common to read Parquet into Arrow for transport.

I'm confused by this. Are you referring to Arrow Flight RPC? Or are you saying distributed analytic engine use arrow to transport parquet between queries?

New comment by aynyc in "Apache Arrow is 10 years old"

aynyc — Fri, 13 Feb 2026 01:46:52 +0000

Yes, but parquet hates small files.

New comment by aynyc in "Apache Arrow is 10 years old"

aynyc — Thu, 12 Feb 2026 21:38:37 +0000

So feather for journaling and parquet for long term processing?

New comment by aynyc in "Apache Arrow is 10 years old"

aynyc — Thu, 12 Feb 2026 19:21:27 +0000

Given the cost of storage is getting cheaper, wouldn't most firms want to use feather for analytic performance? But everyone uses parquet.

New comment by aynyc in "Apache Arrow is 10 years old"

aynyc — Thu, 12 Feb 2026 18:36:46 +0000

I read that. But afaik, feather format is stable now. Hence my confusion. I use parquet at work a lot, where we store a lot of time series financial data. We like it. Creating the Parquet data is a pain since it's not append-able.

New comment by aynyc in "Apache Arrow is 10 years old"

aynyc — Thu, 12 Feb 2026 18:23:12 +0000

What's the difference between feather and parquet in terms of usage? I get the design philosophy, but how would you use them differently?

New comment by aynyc in "Is passive investment inflating a stockmarket bubble?"

aynyc — Thu, 15 Jan 2026 03:46:29 +0000

Going back how’s many years? I checked recently and VTI easily out perform in the last 5 years.

New comment by aynyc in "I’m leaving Redis for SolidQueue"

aynyc — Wed, 14 Jan 2026 14:43:35 +0000

You'll be amazed on what the new breed of engineers are using Redis for. I personally saw an entire backend database using Redis with RDB+AOF on. If you redis-cli into the server, you can't understand anything because you need to know the schema to make sense of it all.

New comment by aynyc in "Try to take my position: The best promotion advice I ever got"

aynyc — Mon, 05 Jan 2026 21:07:55 +0000

This belongs to the "shit that never happened" list.

New comment by aynyc in "Ask HN: What did you lose forever because you had no backup?"

aynyc — Wed, 24 Dec 2025 14:36:22 +0000

I lost all my college projects due to source forge bullshit decades ago. And old pictures from digital/film cameras. Right now, I run both google/apple photos so I have 2 backups of my pics and videos.

Honestly, after 20 some years in technology, I don't think it's possible to back up everything unless you are willing to pay and constantly work at it.

New comment by aynyc in "Avoid UUID Version 4 Primary Keys in Postgres"

aynyc — Mon, 15 Dec 2025 15:07:11 +0000

I've seen this type of advice a few times now. Now I'm not a database expert by any stretch of imagination, but I have yet to see UUID as primary key in any of the systems I've touched.

Are there valid reasons to use UUID (assuming correctly) for primary key? I know systems have incorrectly expose primary key to the public, but assuming that's not the concern. Why use UUID over big-int?

New comment by aynyc in "Django: what’s new in 6.0"

aynyc — Wed, 10 Dec 2025 16:38:06 +0000

Yes, we have to in order to use a lot of the features. The core issue for us is really the way Django assumes code represents database state. In normal webapp where the application has full control of the database, that's a good idea. But our databases are overloaded for simple transactions, analytics, users managements, jobs and AI. Business uses the databases in various ways such as Power BI, Aquastudio, etc.. Django app is actually a tiny part of the database. As you can imagine, we duck tape the heck out of the databases, and Django goes bonkers when things aren't matching.

New comment by aynyc in "Django: what’s new in 6.0"

aynyc — Wed, 10 Dec 2025 16:29:38 +0000

Any docs? Django migration is a HUUGE pain point for us.

New comment by aynyc in "Django: what’s new in 6.0"

aynyc — Wed, 10 Dec 2025 14:48:17 +0000

That’s what we do now. But it gets repetitive and not leveraging Django core features.

New comment by aynyc in "Django: what’s new in 6.0"

aynyc — Wed, 10 Dec 2025 13:47:52 +0000

I've been using Django on and off at work for the past few years. I really like it. That being said, I still find its ORM difficult. I understand it now that since it's an opinionated framework, I need to follow Django way of thinking. The main issue is that at work, I have multiple databases from different business units. So I constantly have to figure out a way to deal with multiple databases and their idiosyncrasies. I ended up doing a lot of hand holding by turning off managed, inspectdb and then manually delete tables I don't want to show via website or other reasons. For green webapps we have, django is as good as it gets.

New comment by aynyc in "UniFi 5G"

aynyc — Fri, 05 Dec 2025 20:52:21 +0000

Thanks!

New comment by aynyc in "UniFi 5G"

aynyc — Fri, 05 Dec 2025 19:57:22 +0000

Thank you! He recently did a job on a newly constructed venue hall for about 300-400 people. He originally quoted full UI which has everything the company is looking for, from network to security camera. The company didn't want that, I think he ended do a combination of Cisco and some odd security system.

New comment by aynyc in "UniFi 5G"

aynyc — Fri, 05 Dec 2025 19:25:15 +0000

What kinda of small businesses? My friend does consulting and most of his business is on small (100-250 employees) size and sometimes small start up, typically in the office construction phase where he comes in and set up network infrastructure. He never seems anyone asking for UniFi, but again, might just because the cost? He feels UniFi is price competitive at that scale but no one wants it for some reason.

When he was with a larger company, cisco and juniper were the only options.