No. A very simple model like that breaks down on many levels. The most important level that reality intrudes in is the fact that your I/O probably can't really be threaded so widely.
What kind of storage are you using? How big is your data? Sent from my iPhone > On Jul 7, 2015, at 6:38, "Yousef Lasi" <[email protected]> wrote: > > Am I correct in assuming that it will allocate a thread for each core > available to all drill bits and read x numbers of columns in parallel? so if > we have 48 cores available and the file has 48 columns, then the time for the > query for a single column should roughly equal the time for 48 columns? All > other factors, such as data types being the same of course.
