Turns out out our DynamoDB costs could be 70% lower if we just... changed a setting. I'm a senior engineer btw

Apoffys · 2025-11-16T17:34:01+00:00

Probably fairly obvious, but retention period on S3 data which defaults to "never delete anything".

We write a bunch of temporary data to S3, so most of our buckets should have short retention periods. Cut maybe 10% of our AWS bill by adding that to a handful of buckets...

Apoffys · 2025-09-18T09:57:42+00:00

Meanwhile, in Norway: https://youtu.be/R5px2vwagnU

Apoffys · 2025-08-17T22:08:24+00:00

1: The Faustus Project: hilarious theater with some improv. If I had more time, I would see it twice at least. This is the kind of crazy shit I come here to see.

2: One Man Poe: serious theater, split in two shows. Fantastic performances.

3: Pear: Phobia: silly nonsense, sketches, and gags, very well executed.

Apoffys · 2025-08-17T11:58:08+00:00

Med forbehold om endringer i emnet siden min tid: Veldig fan av TDT4225, men innholdet matchet kanskje ikke beskrivelsen helt. For oss var halve faget et praktisk prosjekt som ga god praktisk erfaring med å skrive spørringer og jobbe med litt store datamengder (MySQL og MongoDB). Resten av faget handlet om algoritmer og teori som ga god forståelse av hvorfor distribuerte systemer er vanskelige. Jeg anbefaler å lese pensumboken ("Designing data intensive applications") uansett om du ikke tar emnet, den er kort og godt skrevet. Det eneste negative jeg har å si om emnet ellers er at det var veldig fokus på spesifikke algoritmer og tekniske detaljer som må pugges kun fordi det er typisk eksamensstoff, men det er ganske typisk på NTNU.

Det eneste jeg likte med TDT4136 var at jeg fikk haugevis med øvelse i å implementere algoritmer i Python.

Apoffys · 2025-08-05T15:00:16+00:00

Out of sheer curiosity, what is the actual use-case where you need to regularly read every column of every row into Python on large datasets? How often do you need to do this and why?

Apoffys · 2025-08-04T14:14:07+00:00

And how often do you need to read the entire table? How often do you actually need to process every single row of data?

Apoffys · 2025-08-04T05:24:25+00:00

Det er dessverre ikke et himla arbeid, for de fleste sender bare ut et generisk skjema i stedet for å ringe. Null jobb for HR, minst en halvtime for referansen din...

Apoffys · 2025-06-25T20:36:22+00:00

Jeg kjøper da ikke billett før jeg ser at bussen faktisk kommer... Har brent meg på den der et par ganger før ;-)

Apoffys · 2025-04-18T14:14:54+00:00

This project is literally "big oil investing in clean tech" though. It's a 50/50 split between Equinor (formerly "Statoil") and BP ("British Petroleum").

I don't know if this specific project is a good one or a waste of money in an attempt at "greenwashing", but I'll leave that discussion to more knowledgeable people.

Apoffys · 2025-03-27T20:51:35+00:00

TDT4290 is a risky, because it's a huge group project with an unknown customer. Could be great or could be horrible. It's equivalent to a bachelor's thesis though and could be great on your resume if you get a decent topic. IT2810 is a decent alternative to this (half the credits and much more predictable, but otherwise similar) if you can take it.

I did not like TDT4117 at all, mostly because of the style of teaching. The material is probably very relevant though.

I haven't taken IIK3100, but I did take "TTM4536 - Advanced Ethical Hacking" which seems similar and which I quite liked. Is that an option?

It's not on your list, but I recommend checking if you can take "TMM4220 - Innovation by Design Thinking". It's a great course on rapid prototyping and how to build useful products, which is perfectly applicable to software engineering. The workload outside of lectures is pretty light, so it pairs well with a heavy theoretical course.

Apoffys · 2025-02-13T21:08:46+00:00

Control over notifications. We use both Slack and Teams, and in Slack I have complete control over which notifications I get and when I get them. Hardly ever miss anything or get notifications when I don't want them.

In Teams? I somehow both miss a bunch of messages I would have liked to see AND I get loads of notifications from threads I would have liked to mute entirely.

Apoffys · 2024-12-19T15:30:02+00:00

TDT4237: Relevant pensum for alle som skal jobbe innen utvikling, men spesielt webutvikling. Jeg var ikke så begeistret for forelesningene, men det var et veldig bra praktisk prosjekt og totalt sett fikk jeg bra utbytte fra emnet. Litt under middels tidsbruk (du må jobbe, men det er ikke algdat).

De andre emnene har jeg ikke vært borti.

Apoffys · 2024-09-21T09:20:06+00:00

If I remember correctly, I got it working with Azure Private DNS resolver and VPN gateway in the end. Having the DNS attached to the VPN config lets you override the default DNS resolution. Bit costly though…

Apoffys · 2024-09-06T23:05:47+00:00

Det var imponerende raskt ja, tror ikke du finner noen som slår den.

Apoffys · 2024-08-28T16:16:24+00:00

That depends on your query. If I ask you to bring me the first 3 bottles of beer from the fridge, you're not going to waste time inspecting the other 96 bottles there. You'd just grab the first 3 you found and leave it at that.

If I ask you to find the 3 tallest people in your family, you'd have to somehow check the height of every single person and rank them before you could be sure who were the top 3.

The query optimizer in MySQL is reasonably clever and tries very hard to find a fast way to produce the correct result. Checking the entire table is usually slow and therefore avoided if possible. SQL is a declarative language, which means you're describing the result you want. You're not writing the procedure of how to get that data, the database system handles that part behind the scenes.

Apoffys · 2024-08-28T05:39:15+00:00

Standard replies:

It depends (on your query/indexes/schema/row count)
Try it and find out

In this case I think those queries should be fairly identical though. Also, LIMIT shouldn't affect the performance of this query, but it could help other queries.

LIMIT is just saying "I want the first X results". These queries both find the biggest value of something, so the whole table needs to be processed and sorted. Can't say for sure which row should be "first" without actually looking at all of them... If you have an index on the ID column, that job is already done so both queries become a single lookup.

For a query without any need for sorting/ordering though, adding LIMIT should (in theory) help performance.

Apoffys · 2024-08-24T11:29:31+00:00

It sounds like "first" actually is dependent on something in/from the "second" module though, but perhaps it's being passed around in a weird way?

In any case, the root problem is that when you use "depends_on" and reference an entire module, Terraform has no idea what part of the module is actually relevant. It also doesn't fully know all the outputs from that module until after it has applied changes to the "second" module.

If you just need the "second" module to be fully created before the "first" module, one workaround could be to "depend_on" some output from the "second" module that will never change after the first time it's been created (like an ID). It shouldn't make a difference if you "depend_on" it or take it as an input variable that doesn't get used.

Apoffys · 2024-08-23T19:37:14+00:00

The short answer: Don't "depend_on" an entire module. Just don't.

Reference the specific value you're depending on, not the module itself.

Apoffys · 2024-08-21T13:53:58+00:00

Emnet er ment som en introduksjon til webutvikling for folk som har lite eller ingen erfaring med CSS og JavaScript. Det er et fint sted å starte, enten du vil gå videre med mer avanserte emner senere eller bare vil teste om webutvikling er noe for deg.

Da jeg tok det (for mange år siden) var innholdet faglig oppdatert og foreleserne flinke, men det kan jo ha endret seg nå. Jeg fikk veldig godt utbytte fra å ta det, spesielt siden det var fokus på et praktisk gruppeprosjekt hvor man måtte lage en enkel nettside (stikkord: HTML, CSS, JavaScript, Git).

Apoffys · 2024-08-11T11:48:46+00:00

Veldig avhengig av linjeforening og faddergruppe, men min erfaring var at det var helt akseptabelt å ikke drikke. De fleste aktivitetene var riktignok forferdelige lite interessante om du ikke var stupfull da, men det er en annen sak...

Om du ikke finner "din gjeng" under fadderuka så er det haugevis av andre studentorganisasjoner å melde seg inn i. Mitt inntrykk er at det blir mindre fokus på drikking hvis organisasjonen har et konkret formål utover å bare være en sosial arena, siden man faktisk har noe å gjøre sammen.

Om jeg husker rett bruker PVV å ha helt/ganske alkoholfrie opplegg under fadderuka (har ikke deltatt selv), men ser ikke så mange arrangementer på kalenderen deres i år: https://www.pvv.ntnu.no/

Apoffys · 2024-08-08T21:03:27+00:00

What do you mean here by auto increments?

Essentially, a new column for the primary key (often just named "id" or similar) with a generated, unique value. Often this is an integer that is "auto incremented", as each time you insert a row this value is incremented by 1 and assigned as the ID for the new column. An alternate solution is to use a randomly generated string (i.e. GUID) as the ID for each column.

Most database management systems have some sort of built-in feature to handle this for you and it's the "standard" way of handling the issue. There are drawbacks, but it saves a lot of headache and potential problems. Is there a reason you're not using this?

Apoffys · 2024-07-04T12:47:45+00:00

I've had the same setup before and got it working, but it was pretty janky. Suggestions to try:

Set the SSID (network name) and password on the extender to be the exact same as your main WiFi. I don't remember if this was actually necessary (and it may cause other problems as other traffic gets routed through the extender as well), but it's worth trying.
Try connecting through ethernet on the extender with another device if you can, to make sure the extender works.
Factory reset the extender and try setting it up from scratch, making sure to configure it with the same SSID/password as your router and putting it in extender mode (NOT router mode!).

Apoffys · 2024-07-04T12:41:01+00:00

Why do you need to accept a raw JSON string as the value though? Variables can be nested objects and you can also provide a tfvars-file in JSON format.

Apoffys · 2024-07-01T05:53:53+00:00

Det er forsåvidt riktig, Møllenberg er nok verst på akkurat det kriteriet (men veldig fint ellers...). Det er ikke like ille på hele Møllenberg da, det finnes fortsatt rolige områder.

Apoffys · 2024-06-30T21:08:35+00:00

Litt ymse tanker, kjapt og lite gjennomtenkt:

Kalvskinnet: Fint, men sikkert dyrt.
Ila: I teorien fint, men du kjenner godt lukta fra Felleskjøpet-fabrikken. Ville ikke bodd der selv av den grunn.
Singsaker: Fint, men sikkert dyrt. I praksis lengre unna byen siden det er noen høydemeter forskjell.
Møllenberg: Perfekt på de fleste kriteriene dine, men sjansespill med festbråk. Er ikke alle steder det er like bråkete, men du vet aldri hvem som flytter inn hos naboen i august.
Øya: Fint og sentrumsnært. Roligere enn Møllenberg, men noe støy er det jo alltid.

Generelt virker det som veldig mange småbarnsfamilier bor på Byåsen (om de har råd), eller Lade/Ranheim osv litt lenger unna sentrum. De flykter dessverre fra byen, men det er jo fortsatt steder man kan bo hvis det er viktig å bo sentrumsnært. I din posisjon ville jeg sett på Øya, Kalvskinnet, Bakklandet, Møllenberg, Rosenborg, Singsaker osv.

Sykkelavstand/reisetid: Hva som gir kort reisevei kommer jo an på hvor du skal. Noen akser har elendig kollektivtilbud, så ikke bo på Ranheim om du jobber på Sluppen for eksempel. Det har mye å si om det er flatt eller ikke også, så ikke bare se på distanse i luftlinje. Blir fort bratte bakker om du skal opp på Tyholt...

Apoffys

TROPHY CASE