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»Forums Index »Archive (2017 and earlier) »IQFeed Developer Support »Historical lookup best practice

Author	Topic: Historical lookup best practice (2 messages, Page 1 of 1)
davhol_03086 -Interested User- Posts: 10 Joined: Apr 27, 2005	Posted: Nov 20, 2005 10:43 PM Msg. 1 of 2 Do I need to serialize my lookup thru one socket connection? Or, can I open a connection for each symbol, using a fixed size thread pool so that the number of connections at any one time will be limited? I will be requesting daily data for up to one thousand symbols, usually before the market open. Are there any tricks, hints, or things to look out for? I program in Java. Thanks, David
DTN_Jay_Froscheiser -VP, Product Operations- Posts: 1746 Joined: May 3, 2004 DTN IQFeed/DTN.IQ/DTN NxCore	Posted: Nov 21, 2005 01:49 AM Msg. 2 of 2 We don't have a specific limit to the number of threads or socket connections you can make to IQFeed, but then, we also haven't tested a worse case scenario to see at what level you may impact the client/server. I think you will find that most developers set a fixed size thread pool as you mentioned. If you are going to be pulling a thousand symbols' daily data, it would make sense that you only need to pull a single data point each day, and you should be able to churn through pretty quick. However, we recommend and prefer that you do this during after hours (as you mentioned). Jay Froscheiser DTN - Trading Markets