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jaydub

1,332 karma · joined March 3, 2008

"In theory there is no difference between theory and practice. In practice there is."
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jaydub··on Ask HN: What do you call the box with the CPU in when talking to non techs
the case
jaydub··on Defeated
I have to admit that I had an eerily similar experience at Logan Airport around a month ago where I opted out. I was given a very difficult time, the TSA agent repeated multiple times that I should just go through the machine and that I'd be exposed to more radiation on the airplane etc. They kept calling for a "male assist.

I waited it out for like 25 minutes and finally the guy came and took me through. But it was such an annoying experience that I'd since given up on it.

jaydub··on PayPal accidentally credits man $92 quadrillion
Since it was only in the statement, it was probably an error in the reporting engine, and not in his actual account ledger.

Oh summer interns

jaydub··on WalmartLabs acquires Tasty Labs
What's next for joshu?
jaydub··on This page is anonymous
voidnull == lgv ?

Just a wild guess based on some quick searching https://news.ycombinator.com/item?id=1755073

jaydub··on FBI Updates on Boston explosions
I wonder if some sort of image processing could be done to further clear the images of the face given the belief of how the hat ought to look?
jaydub··on Much Modern Innovation Isn't
The article makes a point that impactful change tends to come from trial-and-error over a longer period of time. I think in startups it's possible but its a lot harsher environment where only the strong/successful ones survive early to mature and spread their innovation. Maybe at a larger company the same experiment would have had more time to incubate, perhaps because (at e.g. Bell Labs) the parent could afford to invest in basic research for a long time. Or maybe a startup founder would see a problem in a very different light and attack it in a way that a big company (perhaps AT&T today) would never OK in the first place.
jaydub··on Much Modern Innovation Isn't
My fundamental question is: what exactly is innovation? We throw this word around all the time - but is there a way to quantify it? Perhaps the number of people who use or rely upon a given technology? Even if something is widely used, is it necessarily innovative (i.e. is that part of the definition)?
jaydub··on Browse Amazon, Randomly
I like it, can you add random browsing within a category (e.g. I want to browse random humor books)
jaydub··on JPMorgan Trading Loss May Reach $9 Billion
Certainly there is value in facilitating the "world's money flows"? Agreed that using taxpayer money to gamble is "disgusting" but surely the companies that do the things we all know and love (google, apple, etc) have benefited from the capital markets, and thus big banks like JPM. Without being public companies could google and apple have become what they are today?
jaydub··on Software bug fingered as cause of Aussie A330 plunge
What about http://en.wikipedia.org/wiki/Byzantine_fault_tolerance
jaydub··on I am graduating soon. Should I work at a small startup or a large company?
...and sometimes tasks like getting hardware seem impossible in a timely manner.

This is a good point. There's a lot of red tape at big companies and sometimes doing the simplest things (e.g. setting up an Apache server) can be made into maddeningly bureaucratic operations (fill out the support ticket -> X -> Y...)

jaydub··on Facebook Derivatives: Wall Street Goes Rogue-er
Investors in private companies need to be accredited per SEC regulations (correct?) [1]. Do investors in these derivatives also need to be accredited?

Clearly, "because private-company financials are opaque" investing in the derivatives is speculative. The securitization of Facebook shares is not inherently "evil", but the issues arise if/when these derivatives are misunderstood and overly available for public consumption.

[1] http://www.sec.gov/answers/accred.htm

jaydub··on The Cocktail Creationist - Story about the man behind Grey Goose
I came across an interesting article "Can malt whisky be discriminated from blended whisky? The proof. A modification of Sir Ronald Fisher's hypothetical tea tasting experiment." http://www.ncbi.nlm.nih.gov/pmc/articles/PMC1550199/ via a blog post over at http://keepyourspiritsup-faune.blogspot.com/2008/12/grey-goo...

Basically, its all about creating a perception of value.

jaydub··on Ask HN: How did you learn about the design/architecture of backend systems ?
Every request does not require a thread to be spawned (depends on configuration/load), but every connection would require its own thread.

"The worker MPM uses multiple child processes with many threads each. Each thread handles one connection at a time. Worker generally is a good choice for high-traffic servers because it has a smaller memory footprint than the prefork MPM.

The prefork MPM uses multiple child processes with one thread each. Each process handles one connection at a time. On many systems, prefork is comparable in speed to worker, but it uses more memory. Prefork's threadless design has advantages over worker in some situations: it can be used with non-thread-safe third-party modules, and it is easier to debug on platforms with poor thread debugging support."

http://httpd.apache.org/docs/2.0/misc/perf-tuning.html

jaydub··on Ask HN: Variable Declaration Location
Maybe its just an old C (C90 I think?) habit where declarations and code could not be mixed.
jaydub··on The Skip list
A lecture I watched compared skip lists to subway routes with multiple (randomly routed) express lines.

I had Prof. Pugh for an honors CS course @ UMD and that's how he first described it to the class.

jaydub··on Ask HN: What are you working on tonight?
as of ~a year ago: "3.0 GHz Core whatever, 12 GB RAM, 64-bit FreeBSD 7.1"

see: http://news.ycombinator.com/item?id=516118

jaydub··on Ask HN: Please re-review my new website www.favilous.com
I think the design looks cool. Personally, I would like to see the fonts in the main graphic a little fuller & "fatter" if you will. I think those bullet points are part of your key selling points, so they should probably be bold and strong in order to draw more attention.
jaydub··on The end of corporate computing
First of all, the electrical grid (http://en.wikipedia.org/wiki/Electrical_grid) is by this point a pretty well hardened and redundant infrastructure in major metropolitan areas.

I do think that for startps and smaller companies, receiving and paying for storage/compute power like electricity is the way to go.

But back for a moment to the A/B example. My point here is really with companies that are dealing with sensitive information. Let A = JP Morgan & B = Morgan Stanley.

JP Morgan, I would guess (somewhat wildly) probably owns and operates in the neighborhood of 18,000+ servers. At least half of those (roughly), probably contain mission critical programs and data. The other half, that don't contain mission critical data per se, probably contain either 1) backups of mission critical applications for emergencies, 2) email, documents etc of every single employee (sensitive data).

Now as long as JP gets the electricity that it needs who care where it comes from? It just needs to run its business. But the moment it lets important data out the door, all bets are off. Who accessed what? Is the network secure? Is the building physically secure from intrusion and corporate espionage? Does Morgan Stanley now know the JP automated trading strategies? and so on... Which is why I would say its not a no brainer to simply give up control of server infrastructure.

jaydub··on The end of corporate computing
Sorry for not making it more clear, but I did not mean to suggest that is merely a binary option.

Yes, firms can co-locate their equipment in other firms DCs but its not a silver bullet either. You still run up heavy costs associated with renting the physical space, and hardware maintenance. If we're talking about a company of significant size that is going to be part of a paradigmatic shift -- the cost/benefit of co-locating doesn't scale well (and that's why you'll see many sizable non pure tech companies that own and operate their own DCs)

jaydub··on The end of corporate computing
While electricity is pretty much fungible, data is not.

Imagine there exist two companies who are competitors, A and B. Now company A outsources its data with a third party service. When company A managed its own hardware infrastructure it had tight control over physical access to every machine. Now that its data is hosted with a 3rd party, there is a greater possibility that the data becomes physically compromised.

jaydub··on The end of corporate computing
I do believe that we will see more and more companies go without their own physical data center footprints and will rely on a more fluid, "cloud" infrastructure.

The initial costs associated with building a data center seem enormous. The maintenance costs also must be staggering. Does anyone know what percent of DC construction/maintenance is spent on redundancies? (e.g. backup generators, UPS, multiple carrier services, etc).

Abstracting away the physical infrastructure for a 'logical' infrastructure (if you will), seems very attractive to me. Particularly if I can have an on-line balance between compute cost and benefit.

One major concern with this approach is security, both physical and otherwise...

jaydub··on Ask HN: What equity percentage for a co-founder joining after de-risking?
Great point.

I can imagine how "Bob" must feel. But execution on the idea is the most important thing.

Until you've created version 1, you're still at the theoretical stage. And while in theory you may see your company being worth (m|b)illions in a few years, the reality is that you need to implement.

Again, like brk suggests, why get mired in an argument over whether you control 100% or 90% of "0". Building a startup and creating value is a lot harder said than done I would imagine. Use your judgement and do whatever it takes to get the best person on board.

jaydub··on On Becoming a Quant
I know that some of the larger operations get live market data from Bloomberg and Reuters. You may want to take a look at https://loginabout.reuters.com/Home/RMDS.aspx although I have no idea how much it costs.
jaydub··on Furious investors warn troubled Dubai it will 'never raise a penny again'
I read The Ascent of Money, by Niall Ferguson over the summer and I am reminded of a passage discussing Argentina:

"So successful did Argentina's default prove (economic growth has since surged while bond spreads are back in the 300-500 basis point range) that many economists were left to ponder why any sovereign debtor ever honours its commitments to foreign bondholders"

http://books.google.com/books?id=JA_IYJ0P4ZkC&lpg=PA4...

jaydub··on My Nightmare Interviews With Google
I would tend to agree, and for those interested in this type of skill I think its worth checking out http://en.wikipedia.org/wiki/Fermi_problem
jaydub··on Ask HN: Best way to go about pitching a VC that's coming to your school?
I don't think its a necessarily question of your business acumen.

Since the VC has a strong technical background (M.S. in CS), I would guess that they would probably be more interested in the course of a conversation in the "intellectual" / technical side of things rather than the mundane financial boring stuff.

Also, probably better than seed funding would be to connect with this VC, and see if you would like him to mentor you. If you're throwing a business plan and slide deck out it might seem like you are just another opportunistic gold-digger, whereas if you can just show how passionate and energetic you are, as pg suggested, its much more likely to lead to a longer term relationship.

jaydub··on 1 - 2 + 3 - 4 + 5 - 6 + ... made easy
http://en.wikipedia.org/wiki/Telescoping_series
jaydub··on NASA Discovers A Ring Around The Solar System
Why do the images from IBEX take 6 months to be composed?
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