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From: Martin Wege <martin.l.wege@gmail.com>
Date: Mon, 18 Dec 2023 09:33:16 +0100
Message-ID: <CANH4o6MGLTCYuDBZfyrDn7OpD=HcUG9KcY8Qhhv5mzHj4Jr03Q@mail.gmail.com>
Subject: Re: NFSv4 alternate data streams?
To: Linux NFS Mailing List <linux-nfs@vger.kernel.org>
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On Thu, Nov 30, 2023 at 3:03=E2=80=AFPM Chuck Lever III <chuck.lever@oracle=
.com> wrote:
>
>
>
> > On Nov 29, 2023, at 10:59=E2=80=AFPM, Martin Wege <martin.l.wege@gmail.=
com> wrote:
> >
> > Hello,
> >
> > does the Linux NFSv4 server has support for alternate data streams?
> > Solaris surely has, but we want to replace it. As our Windows
> > applications (DB) rely on alternate data streams the question is
> > whether the Linux NFSv4 server can fully replace the Solaris NFSv4
> > server in that respect.
>
> Hi Martin -
>
> Linux NFSD does not support alternate data streams because none of
> the underlying file systems on Linux implement them. Very much like
> the HIDDEN and ARCHIVE attributes.
>
> I believe Solaris and their storage appliance are the only
> implementations of NFS that do support them, since they have
> implemented streams in ZFS.
>
> Instead, Linux NFSD implements extended attributes (that's what
> our native file systems and user space support). I realize that
> the semantics of those are not the same as stream support.

SMB server on Linux supports Alternate Data Streams - why can't the
same be done for NFSv4? Otherwise we're stuck with using SMB

Thanks,
Martin