JDK-8265175 : (fs) Files.copy(Path,Path,CopyOption...) should use sendfile on Linux
- Type: Enhancement
- Component: core-libs
- Sub-Component: java.nio
- Priority: P4
- Status: Resolved
- Resolution: Fixed
- OS: linux
- Submitted: 2021-04-13
- Updated: 2025-01-24
- Resolved: 2021-04-16
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| JDK 17 |
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17 b19Fixed  |
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Description
On Unix the copy is implemented in sun.nio.fs.UnixCopyFile.copy() which calls a native method transfer(int,int,long) to perform the actual data copying. The copy is effected via a user-space buffer in a loop of read()-write() invocations. Instead of going via user-space buffers, the copy should be able to be done more efficiently using zero-copy as implemented by the Linux system call sendfile().
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