Proposal for adding O_DIRECT support into JDK 9

Alan Bateman Alan.Bateman at
Sat Aug 27 07:43:48 UTC 2016

On 26/08/2016 23:31, Lu, Yingqi wrote:

> Dear All,
> This is a proposal for adding O_DIRECT support into JDK 9 for reading/writing from/to a file on Linux platform. O_DIRECT is a file-open flag to pass to OPEN (2). It tries to minimize cache effects of the I/O to and from this file. File I/O is done directly to/from user-space buffers. Please refer to for more details.
FIS/FOS/RAF doesn't seem the right place for this. Have you looked at 
using extended open options with FileChannel instead?


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