The configuration for the memory_limit of PHP running as an Apache module to server webpages has to take into consideration how many Apache process you can have at the same time on the machine — see the MaxClients configuration option for Apache. If MaxClients is 100 and you have 2,000 MB of RAM, a very … Read more
Typically, you can quantify how well an algorithm will scale by using big-O notation to analyze its growth rate. When you say that your algorithm works by “brute force,” it’s unclear to what extent it will scale. If your “brute force” solution works by listing all possible subsets or combinations of a set of data, … Read more
So I’ve been trying to figure out the real bottom-line when it comes to NoSQL vs RDBMS myself, and always end up with a response that doesn’t quite cut it. In my search there are really 2 primary differences between NoSQL and SQL, with only 1 being a true advantage. ACID vs BASE – NoSQL … Read more
What I will say in this answer is not specific to Kohana, and can probably apply to lots of PHP projects. Here are some points that come to my mind when talking about performance, scalability, PHP, … I’ve used many of those ideas while working on several projects — and they helped; so they could … Read more
Load balancing Most probably for the most simple sites you don’t need any scaling at all. Just one single box will get you covered. After that you should do load balancing like you are mentioning which is almost the same for every architecture(like you are saying you could start multiple node processes first. But when … Read more
A ‘feature flag’ (or Feature Toggle) is the ability to turn features (sub-sections) of your application on/off at easily: perhaps via a re-deploy, or some internal page where pages/features can be toggled live. I guess the example there was that it’s handy to have the control to reduce the feature-set somewhat if you need to, … Read more
As it was pretty much covered here, what you are trying to do here is not possible with plain, old-fashionned WebRTC (strictly peer-to-peer). Because as it was said earlier, WebRTC connections renegotiate encryption keys to encrypt data, for each session. So your broadcaster (B) will indeed need to upload its stream as many times as … Read more
boost::asio is not as thread-friendly as you would hope – there is a big lock around the epoll code in boost/asio/detail/epoll_reactor.hpp which means that only one thread can call into the kernel’s epoll syscall at a time. And for very small requests this makes all the difference (meaning you will only see roughly single-threaded performance). … Read more
“What are the largest sites built on Django today?” There isn’t any single place that collects information about traffic on Django built sites, so I’ll have to take a stab at it using data from various locations. First, we have a list of Django sites on the front page of the main Django project page … Read more
For (heh) awesome fuzzy/partial string matching algorithms, check out Damn Cool Algorithms: http://blog.notdot.net/2007/4/Damn-Cool-Algorithms-Part-1-BK-Trees http://blog.notdot.net/2010/07/Damn-Cool-Algorithms-Levenshtein-Automata These don’t replace tries, but rather prevent brute-force lookups in tries – which is still a huge win. Next, you probably want a way to bound the size of the trie: keep a trie of recent/top N words used globally; for … Read more