sajalkayan - Slashdot User

Comment dont buy it (Score 2) 163

by sajalkayan on Sunday December 12, 2010 @07:18AM (#34528026) Attached to: Hosting Giants Teaming Against Small Businesses

there has to be more to the story. ive been with softlayer for few years now... and they don't seem the kind who would do this for competitive advantage. Wait until Monday evening before forming an opinion... http://www.sajalkayan.com/simplecdn-goes-down-a-case-for-using-multiple-cdn-providers.html

Comment Re:This is not accurate (Score 2, Interesting) 187

by sajalkayan on Saturday May 29, 2010 @05:24PM (#32391968) Attached to: How CDNs and Alternative DNS Services Combine For Higher Latency

I'm the author of the blogpost and am inclined to reply. David, I don't mean any disrespect to OpenDNS. It is an awesome service and I too myself use it when nothing else works. I don't have anything against OpenDNS. If you for some strange reason want to discredit data from EC2 instances, please see the data from Thai and the Swedish ISP. Both are personal internet connections of people residing in the respective countries from their homes. Now that you have really discredited me, I have to work harder to get data from someone's home connection is US and UK (apparently you dont recognize data from other locations). Thanks, Sajal

Comment Slashdot uses Akamai (Score 2, Informative) 187

by sajalkayan on Saturday May 29, 2010 @11:14AM (#32389016) Attached to: How CDNs and Alternative DNS Services Combine For Higher Latency

Slashdot.org is serving static assets from the hostname a.fsdn.com which is served via Akamai CDN. I count 19 requests to http://a.fsdn.com/* on a single pageload of the homepage. These static files are currently served by a server within my ISPs network rather than some server on the other side of the globe... Alamai uses DNS routing.

How CDNs and Alternative DNS Services Combine For Higher Latency 187

Posted by Soulskill on Saturday May 29, 2010 @10:41AM from the taking-the-bad-with-the-good dept.

The_PHP_Jedi writes "Alternative DNS services, such as OpenDNS and Google Public DNS, are used to bypass the sluggishness often associated with local ISP DNS servers. However, as more websites, particularly smaller ones, use content distribution networks via embedded ads, widgets, and other assets, the effectiveness of non-ISP DNS servers may be undermined. Why? Because CDNs rely on the location of a user's DNS server to determine the closest server with the hosted content. Sajal Kayan published a series of test results which demonstrates the difference, and also provided the Python script used so you can test which is the most effective DNS service for your own Internet connection."

Comment Re:Stupid (Score 1) 2

by sajalkayan on Saturday May 29, 2010 @09:07AM (#32388274) Attached to: In a CDN’d world, OpenDNS is the enemy

Yes the website's CGI code *can* generate different URLs for images/static content based on IP but almost nobody does that, cause its very expensive to generate and makes server side caching useless. Almost all CDN services use DNS to figure out and point users to the nearest POP. Even slashdot.org is serving static assets from the hostname a.fsdn.com which is served via akamai. i count 19 requests to http://a.fsdn.com/* on a single pageload of /. which is currently served by a server within my ISPs network rather than some server ont he other side of the globe...

Submission + - In a CDN’d world, OpenDNS is the enemy (sajalkayan.com) 2

Submitted by

The_PHP_Jedi

on Saturday May 29, 2010 @03:29AM

The_PHP_Jedi writes: "Alternative DNS services, such as OpenDNS and Google Public DNS, are used to bypass the sluggishness often associated with local ISP DNS servers. However, as more Web sites, particularly smaller ones, use Content Distribution Networks (CDNs) via embedded ads, widgets and other assets, the effectiveness of non-ISP DNS servers may be undermined. Why? Because CDNs rely on the location of a user's DNS server to determine the closest server with the hosted content. Sajal Kayan published a series of test results which demonstrates the difference, and also provided the Python script used so you can test which is the most effective DNS service for your own Internet connection."

Google Proposes DNS Extension 271

Posted by CmdrTaco on Thursday January 28, 2010 @02:02PM from the you-know-my-name dept.

ElusiveJoe writes "Google, along with a group of DNS and content providers, hopes to alter the DNS protocol. Currently, a DNS request can be sent to a recursive DNS server, which would send out requests to other DNS servers from its own IP address, thus acting somewhat similar to a proxy server. The proposed modification would allow authoritative nameservers to expose your IP address (instead of an address of your ISP's DNS server, for example) in order to 'load balance traffic and send users to a nearby server.' Or it would allow any interested party to look at your DNS requests. Or it would send a user from Iran or Libya to a 'domain name doesn't exist' server."

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