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Dawn Parzych

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Top Stories by Dawn Parzych

Yesterday Google announced a new HTML 5 based tool for web based communication and collaboration called Wave.  One of the coolest things about Wave is this is an open-source project, anybody can embed waves in their site and build extensions using the Google Wave API.  The protocol called the Google Wave Federation Protocol  is based on XMPP (Extensible Messaging and Presence Protocol). Reading the documentation on the protocol I immediately started to think about what impact these waves will have in environments with Application Delivery Controllers: What load balancing method is best? What about persistence? Can the content be compressed? Are the waves cacheable? Can the encryption be off-loaded from the servers to an application delivery controller? I'll be interested to see how sites start to build waves. ... (more)

MPTCP: Improving the Mobile User Experience

  Have you ever gotten frustrated when you were browsing on your mobile phone and all of a sudden the connection dropped and you had to resubmit the request or you lost all of the data you had filled out in the form? Traditional TCP is a single path protocol; when the path fails the session is terminated and a new connection needs to be established. When a mobile device switches between the mobile network and wi-fi network, a new connection needs to be established which causes delays and also results in a loss of state. Any data from the previous session is lost – forms ne... (more)

Bing Vs Google - A Performance Perspective

Being the total acceleration junkie that I am the first time a new site is launched or recommended to me the first thing I do is take a look at the performance of it.  So when I heard about Bing the first thing I did was fire up HttpWatch and take a look at the site.  To make things a little more interesting I decided to compare the results to Google, I used the classic home page and not my customized iGoogle home page. Tests were conducted from my home broadband connection in London, England.  Each test was done with a fresh instance of the browser and with an empty browser cac... (more)

A Brief History of TCP

The foundation of the Internet is TCP, it includes the rules for formatting messages, handling congestion, error correction and provides information on where a packet should be delivered, whether it arrived too quickly for the receiving computer and whether it arrived at all. Basically TCP is the glue that ensures network conditions work smoothly. As the way people connect to the internet has changed from 2400 baud modems to high speed fiber to the home and mobile connectivity – TCP is being stretched to perform optimally across multiple channels. It seems like for many years dev... (more)

What are you waiting for?

The future of HTTP is here, or almost here.   It has been 5 years since SPDY was first introduced as a better way to deliver web sites.  A lot has happened since then.  Chrome, Firefox, Opera and some IE installations support SPDY. SPDY evolved from v2 to v3 to v3.1. Sites like Google, Facebook, Twitter, and Wordpress to name just a few are available via SPDY. F5 announced availability of a SPDY Gateway. The IETF HTTP working group announced SPDY is the starting point for HTTP/2. And most recently - Apple has announced that Safari 8, due out this fall,  will support SPDY!  This ... (more)