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)

"I like you guys better than *******...much more stable and a whole lot fewer issues." - Comment from Philip

"IQFeed version 4 is a real screamer compared to anything else I have seen." - Comment from Tom

"And by the way, have to say this. I love the IQFeed software. It's rock solid and it has a really nice API." - Comment from Thomas via RT Chat

"For anyone considering using DTN.IQ for a data feed, my experience with the quality of data and the tech support has been very positive." - Comment from Public Forum

"Excellent datafeed !!!" - Comment from Arely

"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

"Awesome response, as usual. It is a sincere and refreshing pleasure to do business with DTN, compared to your competition." - Comment from Ryan

"My broker in Davenport suggested I give you a try as he uses your service and says its the best." - Comment from Bill via RT Chat

"Thanks for the great product and support. During this week of high volume trading, my QuoteTracker + IQ Feed setup never missed a beat. Also, thanks for your swiftness in responding to data issues. I was on ******* for a few years before I made the switch over early this year, and wish I had done it a long time ago." - Comment from Ken

"I will tell others who want to go into trading that DTN ProphetX is an invaluable tool, I don't think anyone can trade without it..." - Comment from Luther

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 Developer Support »Historical lookup efficiently

Author	Topic: Historical lookup efficiently (2 messages, Page 1 of 1)
davhol_03086 -Interested User- Posts: 10 Joined: Apr 27, 2005	Posted: Jun 10, 2009 11:27 AM Msg. 1 of 2 If I need to retrieve historical data for 500 symbols via the socket lookup. Is it faster to use a thread pool of 50 threads making new connections to the LookupPort for each symbol, or push the 500 requests through on one connection to the LookupPort with a RequestID for each symbol? I think what this boils down to is can I take advantage of concurrent request handling on your server? Or maybe get my requests on your queue sooner? Is there a limit to how many requests I can make on one connection (with unique RequestIDs) at one time? Is there a disadvantage to a large number of requests on one connection? Thanks
DTN_Steve_S -DTN Guru- Posts: 2093 Joined: Nov 21, 2005	Posted: Jun 10, 2009 12:40 PM Msg. 2 of 2 It will definately be more efficient to make multiple socket connections to IQConnect and make simultaneous connections. You will have to do some testing to find out where the breakeven point is in terms of speed vs CPU usage vs available bandwidth for your configuration. Most developers find that between 5 and 10 simultaneous connections is optimal.