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Comment: Re:This is not accurate (Score 1) 187

by scherrey (#32395084) Attached to: How CDNs and Alternative DNS Services Combine For Higher Latency

David, how can you say "this is not accurate" when the article simply says that OpenDNS (which I use and am a big advocate of) *may* not return good results, demonstrates circumstances where this is clearly the case and publishes code where people can reproduce the results themselves? I only wish more articles would do such things and be as accurate.

        It's generally true that these are "edge" conditions but the internet is one giant collection of edges once you get outside the USA and a few major countries. I reside in Bangkok presently, travel around SE Asia a good bit and have found circumstances where using OpenDNS make it impossible to get facebook or google mail working. The local DNS servers are often quite unreliable so a service like OpenDNS is a godsend when it works but, having an awareness of the potential problems as noted in the article has saved me hours of headaches when things get pathological on me.

        I'm glad to hear you're getting POPs in Asia - where the majority of internet users reside and is one heckuva huge "edge". I think it also shows to need for improvements to the protocols which can take a lot of time. I continue to use OpenDNS but now as a backup rather than a primary in locations where latency is increased as a result. Believe me I'm grateful to have it.

        I think you owe the author an apology though. He's trying to be fair and accurate as to the potential issues with services like OpenDNS, help people be aware that they are not a panacea, and explan why. I think that's a good thing that should be commended.

    -- Ben Scherrey

+ - In a CDN’d world, OpenDNS is the enemy-> 2

Submitted by
The_PHP_Jedi
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."
Link to Original Source

Comment: Seen in darkroom. (Score 1) 96

by scherrey (#28967725) Attached to: Sticky Tape Found To Emit Terahertz Radiation

I process my own film and have always noticed, especially with TMAX B&W 120 rolls that - when I finish loading the film into the development spool - as I peel off the tape holding it onto the original film spool, I can see "stars" sparkle as it's peeled. Of course this is done in total darkness (no red light) and after my eyes have fully dilated in the pitch black. Also helps to not look directly at it but slightly to the side because highly sensitive rods in the eye are concentrated around the perimeter of the retina whereas colour-sensitive but not as light sensitive cones are concentrated in the middle. Haven't tried this with any other kind of tape.

    -- Ben

BTW - Ilford makes the sticky tape you lick when you finish shooting a roll of 120 film spearmint flavoured which I think is a nice touch. Wonder if THAT's radioactive too?

Our policy is, when in doubt, do the right thing. -- Roy L. Ash, ex-president, Litton Industries

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