Hi, But that approach would be slow right? assuming that we are dealing with the worst possible volume of data.
________________________________ From: Francesc Alted <[email protected]> To: HDF Users Discussion List <[email protected]> Sent: Fri, August 13, 2010 10:30:56 PM Subject: Re: [Hdf-forum] Select query options 2010/8/13 Rodel Piano <[email protected]> Thanks for thr reply Francesc. > >My codes are in C. Lets say my records are about 12million. I cant use >hyperslab >coz i wont know which region to look for. What is the expected result of my >query is only 10 records out 12 million. > If you don't know which region you should look, then you should look into your complete table. Just use hyperslabs for reading your dataset in small chunks (my suggestion is that these chunks should fit your CPU cache, for improved performance). -- Francesc Alted
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