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Re: Application Design Question

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Re: Application Design Question

Subject: Re: Application Design Question
From: Jens Alfke <email@hidden>
Date: Fri, 4 Sep 2009 20:26:20 -0700


On Sep 4, 2009, at 4:55 PM, Marek Kozubal wrote:

Another question related to this is what API set provides the fastest disk IO under Mac OS X? On the windows side I used FILE_FLAG_NO_BUFFERING and FILE_FLAG_WRITE_THROUGH flags with the ReadFile/WriteFile API.

The fastest will be the low-level POSIX I/O calls (open / write / etc.). To disable caching, call fcntl() using the F_NOCACHE operand. Try to read/write as much as you can in one call -- on the write side, the writev() function can be very useful. For details you might want to look into the Big Nerd Ranch "Advanced Mac OS X Programming" book, or for that matter, any book that covers Unix file I/O in depth.

—Jens_______________________________________________

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  >Application Design Question (From: Marek Kozubal <email@hidden>)




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