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"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

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"Everything is working great ! Very impressive client. The news refreshes better and is more pertinent than the ******* feed I paid $ 100/month for. I Also like the charts a lot." - Comment from Leon

"I have to tell you though that using the IQFeed API is about the easiest and cleanest I have seen for some time." - Comment from Jim

"Just a quick one to say I'm very impressed so far :) The documentation for developers is excellent and I've quickly managed to get an app written to do historical downloads. The system is very robust and pretty quick considering the extent of data that's available. The support guys have been very helpful too, in combination with the forums it's been plain sailing so far!" - Comment from Adam

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»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