Date: Fri, 10 Jan 2025 07:31:32 -0800 From: Rick Macklem <rick.macklem@gmail.com> To: Alan Somers <asomers@freebsd.org> Cc: Dan Shelton <dan.f.shelton@gmail.com>, freebsd-hackers@freebsd.org Subject: Re: WRITE_SAME support in FreeBSD nfsd NFSv4.1 mode? Message-ID: <CAM5tNy59v28wxq=7WNhPPAq8jsMpocFGm0mn0Enfh9woDQuhQg@mail.gmail.com> In-Reply-To: <CAOtMX2i29F8NU493v81ggsdcprr7iifuD1aivaxsULxZrYt1tA@mail.gmail.com> References: <CAAvCNcD1CziGxmgyzyWix5ADsDXRpkbFUM32H9nEji9kR%2BVc-Q@mail.gmail.com> <CAOtMX2i29F8NU493v81ggsdcprr7iifuD1aivaxsULxZrYt1tA@mail.gmail.com>
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On Fri, Jan 10, 2025 at 7:02=E2=80=AFAM Alan Somers <asomers@freebsd.org> w= rote: > > On Thu, Jan 9, 2025 at 5:31=E2=80=AFPM Dan Shelton <dan.f.shelton@gmail.c= om> wrote: > > > > Hello! > > > > Does FreeBSD nfsd support the WRITE_SAME request in NFSv4.1 mode? Just fyi for other readers... A normal NFSv4.2 write pushes the data down the wire to the server. A WRITE= _SAME pushes a description of a data block and a repetition count down the wire to the server, allowing a lot of repetitive data to be written without sending it all down the wire (at least that is my understanding;-). I am not aware of any system call for this at this time, although there is active discussion of this on the Linux NFS mailing list. rick > > > > Dan > > -- > > Dan Shelton - Cluster Specialist Win/Lin/Bsd > > Out of curiosity, what is your use case? >
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