mtanski

23 ms·

241.
by mtanski 10y ago
On Linux you can guarantee (with some effort) that your process / thread will be the only thing running on a core. There's a boot parameter that will let you black list CPUs on which to not schedule anything (by default). Then you
242.
by mtanski 10y ago
I agree that the language of most papers is needlessly obtuse. In fact I doubt that reviewers understand the full concept when evaluating paper submissions. Having said that, even if most papers were vastly simplified I doubt that many topi
243.
by mtanski 10y ago
I believe the URCU library is LGPLed and with IBM blessing: https://github.com/urcu/userspace-rcu/blob/master/lgpl-relic... . So you're probably okay if you use that, or a derivative work of that (t
244.
by mtanski 10y ago
> Interesting. Analogous to the "two phase" commit used by Oracle, as opposed to the global lock used by SQL server. I don't think 2PC is the right analogy here (which is really about distributed commit). But if you want t
245.
by mtanski 10y ago
For any HN readers in NYC who have to care about stuff like this (system level)... you should come to ACM's Applicative 2016 conference. It's June 1st and 2nd at NYU. http://applicative.acm.org/ Paul McKenney is g
246.
by mtanski 10y ago
Most of the performance in processors in the last decade has come from increasing complexity. Compare the single thread performance of the fastest P4 processor to a recent i7. More complexed manufacturing process (smaller), more complex ins
247.
by mtanski 10y ago
No, but neither do yellow cab drivers in NYC that are working as independent contractors.
248.
by mtanski 10y ago
> At the end of the day we as a populace get to decide public policy. That's how we got to the NIMBY polices we have in many major metro areas and that has contributed in a major way to the financial pressures.
249.
by mtanski 10y ago
Arguably if the various vendors in the ad bidding lifecycle chain did more to combat fraud and only show 90% viewable ad (the tech exist) this would lead to lower volume of impressions and higher CPM since everybody is competing for the sam
250.
by mtanski 10y ago
> That's silly and a big waste of money. Most sites that do retargeting do it based on number and stats. They know that if a rando that visits their site (but doesn't buy anything, doesn't sign up for a new letter, doesn&#
251.
by mtanski 10y ago
Well, I was responding to the point of the parent and the article. If there's an article on targeting data I might comment if I have something to add. There's lot of other companies outside of Acxiom that do targeting tracking (it
252.
by mtanski 10y ago
I work in the industry in the industry and I working to change the industry (fixing it from one angle). So I'm going to try to summarize what's going on since Adage manages to be both high level enough but not detail enough at the
253.
by mtanski 10y ago
Can't happen fast enough. For the last two years in a row I try Rust every 6 months to see if it's at a place that I would consider using it. I hit the 3 problems described here every time I try it. You can work around all of the
254.
by mtanski 10y ago
Sorting esp. if your data has some kind of natural sort order can increase compression (in columnar stores), decrease index size (bitmap or fancy bitmap indexes) or lower query execution time (data is cluster vs random read). Here's on
255.
by mtanski 10y ago
"Hey kid, nice treehouse, but what about burglars?" Also building code, fire code, ADA accessibility requirements and permits and sign off.
256.
by mtanski 10y ago
Be glad you're not dealing with the DOB in NY, esp in Brooklyn. The code is so thick that's it's impossible to not violate it in some way... worse yet the decisioning of the employees that approve them are arbitrary. Friend o
257.
by mtanski 10y ago
Bernie supporters turn me off to Bernie. I happen to agree with the guy on many (but, not all) problems facing our country and it's people. But instead on HN, my Facebook & any story about Bernie. His supporters automatically try t
258.
by mtanski 10y ago
I'm not sure why folks are downvoting you because most database systems that provide the full array of relational operations (joins, groupby, groupby cube, etc) do not scale linearly (maybe past a handful of nodes). Mixing OLTP /
259.
by mtanski 10y ago
A few years ago some of the intel SSD drives has issues with this. http://www.evanjones.ca/intel-ssd-durability.html Drive was advertising FUA but it didn't actually implement it (or implemented it incorrectly). Then t
260.
by mtanski 10y ago
> the whole internet is ruining and poisoning and deconstructing whole segments of human interaction and activity and relationship. Let me correct it for you: The whole internet is CHANGING whole segments of human interaction and [...] T
261.
by mtanski 10y ago
It scales poorly because the underlying queue is not lock-free. It was designed in a much simpler time or slower drives (spinning disks). Even if you make it lock-free you still end up paying the communication cost (in/notification). A
262.
by mtanski 10y ago
Your app has to define it's own cascading delete strategy.
263.
by mtanski 10y ago
Many consumer drives tend to omit this feature (or lie about it) because all anybody looks at is size and iops. Nobody sells more consumer drives by advertising that the writeback cache on the drive respects flush commands (and barriers).
264.
by mtanski 10y ago
I'm going to guess that your next step to chase further speeds is going direct to nvme just levering the block layer (per core multiq) skipping the filesystem entirely.
265.
by mtanski 10y ago
First. Seastar & Scylla are really impressive work. Props Avi & team. Doing disk IO well from userspace is hard. There's obvious topics about durability that have been covered on HN for years. Getting good performance out of mo
266.
by mtanski 10y ago
> Value is correlated to many things, but timing is one that cannot be ignored. The real estate market as a general rule moves slower then the stock market (when it does crash in a day or a week). Timing the stock market is hard, much mo
267.
by mtanski 10y ago
Pick a place that has low property taxes and has legal limits on yearly increases. Like CA or NYC on 1 to 3 family homes.
268.
by mtanski 10y ago
This is a phenomenon that's not unique to Cambridge. In many places around the country NIBY forces convinced people that if they don't build new housing neighborhoods will stay (or become affordable) because there won't be ne
269.
by mtanski 10y ago
If you work in state without high state / local income taxes you're a lot less likely to trigger AMT. So really the federal government subsidize wealthy residents of those places the most. If you're like a middle class family
270.
by mtanski 10y ago
A big chunk of income tax that comes from states with high earners gets redistributed via the federal government to other states. States with wacky politicians, that want to legalize bigotry via laws. On top of that, many of those states ac

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