Viewing profile — kevinfat

In the information retrieval space I am aware of software such as the following: lucene, solr, elasticsearch, sphinx, manticore, etc. As far as I am aware these are based on invert…

I often hear the interest rates yielded this result of massive inflation or massive recession. But I'm not sure I believe that. I'm not convinced that the 0% interest rates lead to…

That is wrong. Every description of rollback mentinos that. Replaying inputs after rolling back can result in a new state that is different from the client predictino which amounts…

On more thought I don't see how what you're saying is relevant to my point. The server needs to maintain the current state (which is based on the latest input it has received). No …

Ok interesting there is a lag compensation feature. I did not think of the server having something like that precisely because of what you mentioned it sounds like this is somethin…

So consider a first person shooter with no rollback you're probably going to be aiming slightly ahead of the person to compensate for latency lag. And maybe you'll aim to the other…

Question why is rollback networking good for games? To play devil's advocate with the lag hidden wouldn't this lead me to make decisions without considering the possibility that th…

I don't think that is correct. I don't think the market actually needs phd level stats skills. Its just like the market doesn't need phd level pure math or doesn't need phd level C…

So another way of saying this is consider the space of languages where * control over memory use and layout (in contrast java is a pig over memory usage) * some kind of easy way to…

So for anyone reading this and seeing other comments about gain of function. The first thing you should realize is that the people here commenting about gain of function have no id…

To be a contrarian here to bring up a question, do these things really count? The roots of similar ideas already existed decades ago in old journals for all of these. Maybe the phr…

How do startups get their sales transactions into their accounting software (Quickbooks, cloud based software, or whatever is used)? I assume with your typical web app credit card …

What current attempts are there to replace email with something secure rather than encryption slapped on after the fact like with email? Desirable properties would be like, for exa…

What infrastructure do news aggregators typically use to do the crawling, parsing, indexing, extracting, storing/format in database, etc.? Are there open source news aggregators so…

Do any of them have details of how they built their news aggregator? For example, what infrastructure did they use to crawl, parse, and index the pages, etc.

If I wanted to make a news aggregator site how do I get a curated list of news sites such as http://www.latimes.com/ http://www.washingtonpost.com/ Its not realistic for me to manu…

In my mind the big advantage of Go over Node that is sometimes overlooked is that your code in Go is written in a largely serial manner with no callbacks. With Go you don't have to…

Are any of these good for RTS games? Or is the overhead too much compared to a modified A* path finder that only finds close to optimal paths?

If I am understanding correctly the suggestion is to have a distributed hash table that any backend can lookup to find the other backend it should forward to. And since the distrib…

I've never dealt with Comet. I need the long detailed answer for complete noobs.

So in practical terms how does one setup backends to use WebSockets. For example, suppose you have nginx in front of a bunch of Unicorn or Rainbow processes and there are two clien…

Are WebSocket connections persistent to a single backend? That is, suppose Nginx is in front of two Unicorn processes. Will Nginx maintain a mapping table of client browser connect…

Heroku does not support WebSockets. Which Rails hosting platforms support WebSockets. (Also, if any, which of them give a free mini instance like Heroku does?)

Can someone explain, to people who know nothing about scaling infrastructure, why routing to idle dynos is a hard problem?

That's not a privacy issue. That's a I don't want feature X (ads) issue.