DTN IQFeed, DTN.IQ, DTN ProphetX Support Forums

Join the 80,000 other DTN customers who enjoy the fastest, most reliable data available. There is no better value than DTN!

(Move your cursor to this area to pause scrolling)

"Interactive Brokers tick data was inconsistent, so I have switched to using DTN exclusively. It is great to no longer have to worry about my datafeed all day long." - Comment from Philippe

"Can I get another account from you? I am tired of ******* going down so often" - Comment from George

"Boy, probably spent a thousand hours trying to get ******* API to work right. And now two hours to have something running with IQFeed. Hmmm, guess I was pretty stupid to fight rather than switch all this time. And have gotten more customer service from you guys already than total from them… in five years." - Comment from Jim

"I'm satisfied with IQFeed. It's the most reliable and fastest quote feed I have ever used. Although I'm a resident in China, it's still very fast!" - Comment from Xiaofei

"I had always used ******* but for the past 2 weeks have been trying DTN IQFeed. Customer support has been extraordinary. They call just to make sure your problem hasn't recurred." - Comment from Public Forum

"I started a trial a few weeks back before the market went wild. DTN.IQ didn’t miss anything and beat my other provider. I decided to stay with you because of the great service through all the volatility." - Comment from Mike

"IQ feed is brilliant. The support is mind-bending. What service!" - Comment from Public Forum Post

"Everything is working great with the API. I love it." - Comment from Calvin

"You are much better than lawyers or the phone company because you answer the phone when I call! I just love your customer service." - Comment from Isreal

"I've been using IQFeed 4 in a multi-threaded situation for the last week or two on 2600 symbols or so with 100 simultaneous daily charts, and I have had 100% responsiveness." - Comment from Scott

Home

Recent Posts

Information on DTN's Industries:
DTN Oil & Gas | DTN Trading | DTN Agriculture | DTN Weather

DTN.IQ/IQFeed on Twitter
DTN News and Analysis on Twitter

»Forums Index »Archive (2017 and earlier) »IQFeed Datafeed Wish List »Please consider implementing a Publish-and-Subscribe model for the data feed.

Author	Topic: Please consider implementing a Publish-and-Subscribe model for the data feed. (3 messages, Page 1 of 1)
CBrauer -Interested User- Posts: 32 Joined: Aug 18, 2004	Posted: Jan 4, 2007 01:29 PM Msg. 1 of 3 Hello, I think your IQFeed Client API is fundamentally flawed. You have implemented a Fire hose-and-Bucket model. If the line is not fast enough, or if the application that gets data from the Client is not fast enough, data is lost. Please consider implementing the well established Publish-and-Subscribe model. This will guarantee that data is not lost. I also believe that most of the problems that I see on the Developer Forums will also disappear with this redesign. Charles Brauer Charles Brauer CBrauer@CypressPoint.com
stargrazer -DTN Guru- Posts: 302 Joined: Jun 13, 2005 Right Here & Now	Posted: Jan 21, 2007 05:10 PM Msg. 2 of 3 Would this be in addition to or instead of the existing api? The firehose is fast and efficient, and if an application is unable to keep up, any ats running on the data will not be trading efficiently. And if you take a look at how the exchanges publish their data, that is one massive firehose. Basically, they multicast their data: one stream is published and everyone pulls out of it what they need. er... how does that differ from your suggestion?
CBrauer -Interested User- Posts: 32 Joined: Aug 18, 2004	Posted: Jan 21, 2007 10:32 PM Msg. 3 of 3 Clearly DTN cannot abandon their current API. A new Publish and Subscribe system would have to be developed in parallel with the existing one. A Publish and Subscribe system guarantees the delivery of the data. No data is lost. This solves the problem of a noisy, unreliable internet delivery system that has not implemented the concept of "Quality of Service". Take a look a www.Streambase.com and www.Tibco.com. This thread is afterall just a Wish List... Charles Charles Brauer CBrauer@CypressPoint.com