DoubleSpring Blog http://blog.doublespring.com Just another WordPress site Mon, 17 Oct 2011 11:00:29 +0000 en hourly 1 http://wordpress.org/?v=3.2.1 How FaceBook Copes with 800 Million Users http://blog.doublespring.com/2011/10/14/how-facebook-copes-with-800-million-users/ http://blog.doublespring.com/2011/10/14/how-facebook-copes-with-800-million-users/#comments Fri, 14 Oct 2011 06:59:33 +0000 admin http://blog.doublespring.com/?p=33 Continue reading →]]> Over 800 million people actively use Facebook; updating their status, replying to messages, uploading photos, videos and so on.

Consider these numbers:
- 1 TRILLION page views per month
- Average user is connected to 80 community pages, groups and events
- 250 million photos are uploaded per day
- More than 70 languages available on the site
- Facebook users install apps more than 20 million times every day

How do they manage to deliver this fantastic service without compromising on speed. How is FaceBook’s performance so good?

There’s no single reason, but a whole lot of reasons:

- Heavy usage of caching (APC and memcached), which drastically cuts processing time (30x faster!)

- Usage of HipHop, which converts PHP into C++ code (which is then compiled into much more efficient machine code than actual PHP).

- Facebook uses PHP and MySQL, but that’s not the only thing they use. For example, they use Erlang for their chat, Hadoop clusters for some of their storage. They also use our favourite programming language: PYTHON

- Facebook has data distributed across many, many servers. In June 2010, FB had 60,000 servers. (think that’s too much? Google had half a million… 5 years ago) And yes they own the data center!

- Facebook sends as little traffic as possible: they use static CDNs to deliver static content. Gzip to compress data. Cookies, Javascript, HTML – everything is cut back to reduce the number of bytes sent over the network. They use a technology they call “BigPipe”, which sends partial content rather than the whole page.

]]> http://blog.doublespring.com/2011/10/14/how-facebook-copes-with-800-million-users/feed/ 4 We’re Hiring Python Developers http://blog.doublespring.com/2011/10/13/were-hiring-python-developers/ http://blog.doublespring.com/2011/10/13/were-hiring-python-developers/#comments Thu, 13 Oct 2011 12:26:23 +0000 admin http://blog.doublespring.com/?p=27 Continue reading →]]> We seek passionate PYTHON developers with some experience in building or contributing to Open Source projects. We’re constantly rolling out new products so the right individual would be able to write clean code and work in a fast pace environment. We highly value native ability, passion and the right attitude.

FRESHERS with exceptional coding skills will be considered

Requirements

- Be smart and be passionate.
- Technical proficiency with Python and Django.
- Technical proficiency in JavaScript.
- Experience with MySQL / PgSQL.
- Unix/Linux expertise.
- Experience with MVC design patterns and solid algorithm skills.
- 1 year of industry experience (or equivalent internship experience).
- B.E. in Computer Science or equivalent degree required.

How to apply
Send your resume to: careers@doublespring.com

]]> http://blog.doublespring.com/2011/10/13/were-hiring-python-developers/feed/ 0 Coding A HTML 5 Layout From Scratch http://blog.doublespring.com/2011/10/11/coding-a-html-5-layout-from-scratch/ http://blog.doublespring.com/2011/10/11/coding-a-html-5-layout-from-scratch/#comments Tue, 11 Oct 2011 18:47:12 +0000 bilal http://blog.doublespring.com/?p=24 Continue reading →]]> HTML5 and CSS3 have just arrived (kinda), and with them a whole new battle for the ‘best markup’ trophy has begun. Truth to be told, all these technologies are mere tools waiting for a skilled developer to work on the right project. As developers we shouldn’t get into pointless discussions of which markup is the best. They all lead to nowhere. Rather, we must get a brand new ideology and modify our coding habits to keep the web accessible.

While it is true HTML5 and CSS3 are both a work in progress and is going to stay that way for some time, there’s no reason not to start using it right now. After all, time’s proven that implementation of unfinished specifications does work and can be easily mistaken by a complete W3C recommendation. That’s wereProgressive Enhancement and Graceful Degradation come into play.

]]> http://blog.doublespring.com/2011/10/11/coding-a-html-5-layout-from-scratch/feed/ 0 CSS3 Solutions for Internet Explorer http://blog.doublespring.com/2011/10/11/css3-solutions-for-internet-explorer/ http://blog.doublespring.com/2011/10/11/css3-solutions-for-internet-explorer/#comments Tue, 11 Oct 2011 18:40:37 +0000 admin http://blog.doublespring.com/?p=16 Continue reading →]]> CSS3 is probably the hottest trend in web design right now, allowing developers the opportunity to implement a number of solutions into their projects with some very straightforward CSS while avoiding having to resort to nonsemantic markup, extra images, and complex JavaScript. Unfortunately, it’s not a surprise that Internet Explorer, even in its most recent version, still does not support the majority of the properties and features introduced in CSS3.

Experienced developers understand that CSS3 can be added to new projects with progressive enhancement in mind. This ensures that content is accessible while non-supportive browsers fall back to a less-enhanced experience for the user.

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