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osi

463 karma · joined July 26, 2008

http://fotap.org/~osi

[ my public key: https://keybase.io/osi_; my proof: https://keybase.io/osi_/sigs/6jEikJ9vu_2tOwaFCRbj09aKC8iIOPaqt_drin94OR4 ]

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osi··on Model Once, Represent Everywhere: UDA (Unified Data Architecture) at Netflix
UDA enables both approaches. each has its place.
osi··on Phones track everything but their role in car wrecks
that’s been a problem longer than phones. worse, maybe, but not new.
osi··on Wendelstein 7-X: Gigajoule energy turnover generated for eight minutes
bravo sir very well explained.
osi··on The magic of small databases
i worked at a then-web3.0 startup in the 00’s that had built something that could have been pivoted into this, but instead the CEO wanted to be like Digg instead.

the commercial community of practice is small for sure.

osi··on What is property-based testing? (2016)
i use property based testing for the external api of my business domain service.

yes, the test code is an “oracle”, knowing what the service _should_ be doing. it’s a parallel implementation of the logic, highly geared towards the use-case of testing.

osi··on Event Sourcing (2005)
We're using jqwik's stateful testing to achieve this, https://jqwik.net/docs/current/user-guide.html#stateful-test...

It's essentially as you described.

osi··on The two questions I ask every interviewer
agreed. if it is a "2 hour" project, have that be part of the on-site interview (with the expectation that people might not complete it)
osi··on Do we need a third Apache project for columnar data representation?
and _even if it were_, the ASF doesn't mind. contributors are free to dedicate their time to whatever they choose.
osi··on The Corrosion of High School Debate
ah, Student Congress. I did that and loved it too. I enjoyed it more for learning how to effectively troll, since I wasn't as good as the "politics" part needed to win.
osi··on Epsilon: Graphing calculator operating system
heh, i remember writing a fake "memory clear" program on my TI back in 1994/1995 (i don't remember the exact model).
osi··on Java.­math.­BigDecimal toString is not thread safe
the OP observed the problem on a raspberry pi. sounds like it could be a problem with the ARM JVM that is being used.
osi··on The Marketing Behind MongoDB
Also lost to history is 10gen's original intent of being more of a complete platform, with Mongo just being the storage layer. Business Insider ran on that platform. Some details in https://www.usv.com/blog/10gen

(A friend of mine was VP Eng there and was trying to recruit me to work on the larger platform, but as Mongo started gaining traction they dropped the other parts to focus on that)

osi··on Ask HN: Do you lift?
i train brazilian jiu jitsu 4-5x a week. most of Mon-Thurs evening for classes, then sometimes an open mat session on the weekend.

when i started the goal was weight management, as i was getting tubby as i was getting older. that part worked. now (9 years later), it is for fun.

osi··on ESPN Can't Afford to Go on Like This
for me, it wasn't just the ESPN cost, which was buried in the package. it was also the "regional sports fees" that Comcast lists as separate line items and have very obvious increases.
osi··on Have We Forgotten about Geometry in Computer Vision?
I was just reading https://blog.openai.com/adversarial-example-research/ and it struck me that an understanding of geometry might help. For the examples and scenarios cited, the geometries of the two items would be different (sometimes markedly, sometimes less, like washer-vs-safe).
osi··on New Features Coming in PostgreSQL 10
i helped build a triple store on top of postgresql back in '06-'08. company is gone so i don't know where the IP ended up, but it was a good foundation. we were competitive with the other players at the time.
osi··on How we secretly introduced Haskell and got away with it
makes me wonder how long they would have lasted had the initial implementation been done simpler (ie, not in their PyDatalog fork).
osi··on Rust vs. Go
dunno- just copying what was in the original article :)
osi··on Rust vs. Go
Java would be disqualified due to GC:

> It is worth noting that Go came nearest disqualifying itself entirely here. If it were not possible to lock out Go’s GC in critical regions Rust would win by default.

osi··on Bringing Wide Color to Instagram
I think that's back when Gotham died :/

http://randsinrepose.com/archives/rip-gotham/

osi··on Modern garbage collection
yes, exactly this. and by having scalable GC algos so you don't need to do "off heap" tricks in java, things are much easier.
osi··on Modern garbage collection
Look at what Erlang's BEAM VM does. It has per-"process" heaps iirc.
osi··on Modern garbage collection
Where is the data kept?

The very large heaps are partially driven by distributed in-memory storage systems.

osi··on Uber Should Restore User Control to Location Privacy
I switched to Lyft. Problem solved.
osi··on Ask HN: Are you more likely to apply for a job that discloses salary upfront?
yes.
osi··on Uber Now Tracks Passengers’ Locations Even After They’re Dropped Off
That's the bullshit response they give you to anything that isn't solvable with a ride credit.
osi··on Uber Now Tracks Passengers’ Locations Even After They’re Dropped Off
They don't care about stupid routing. Uber in Chicago routes through alleys ALL THE TIME, but trying to talk to Uber support about this is a dead end. My home address is a street address, but Uber moves the pin to the alley.
osi··on Early Warning Detectors Using AWS Access Keys as Honeytokens
I don't think you read the article. They only mention putting them in private places, as a honeypot to alert about an intrusion.
osi··on Lab-made diamonds: It’s a giant scam, but you’re still going to buy one
when i was younger, i hoped that in the future lab-made diamonds would make it feasible to buy one the size of a baseball for not that much money.
osi··on AppleScript, the perfect adjunct to iTunes: An open letter to Apple CEO Tim Cook
did you read the article? scripting itunes is for curating the consumption library.
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