On Mon, Jul 14, 2025 at 12:36 PM Aurélien Couderc <aurelien.couderc2002@xxxxxxxxx> wrote: > > On Sun, Jul 13, 2025 at 7:50 PM Chuck Lever <cel@xxxxxxxxxx> wrote: > > > > On 7/12/25 9:06 AM, Aurélien Couderc wrote: > > > ? > > > > > > On Wed, Jun 18, 2025 at 9:22 PM Aurélien Couderc > > > <aurelien.couderc2002@xxxxxxxxx> wrote: > > >> > > >> On Wed, Jun 18, 2025 at 2:58 PM Chuck Lever <cel@xxxxxxxxxx> wrote: > > >>> > > >>> From: Chuck Lever <chuck.lever@xxxxxxxxxx> > > >>> > > >>> In the past several kernel releases, we've made NFSv4.2 async copy > > >>> reliable: > > >>> - The Linux NFS client and server now both implement and use the > > >>> NFSv4.2 OFFLOAD_STATUS operation > > >>> - The Linux NFS server keeps copy stateids around longer > > >>> - The Linux NFS client and server now both implement referring call > > >>> lists > > >>> > > >>> And resilient against DoS: > > >>> - The Linux NFS server limits the number of concurrent async copy > > >>> operations > > >> > > >> And how does an amin change that limit? There is zero documentation > > >> for admins, and zero training or reference material for COPY, CLONE, > > >> ALLOCATE, ... > > >> > > >> Aurélien > > >> -- > > >> Aurélien Couderc <aurelien.couderc2002@xxxxxxxxx> > > >> Big Data/Data mining expert, chess enthusiast > > > > > > > > > > > > > The tone of your original email suggested to me that it was a whine > > rather than a genuine request for more information. > > Well, put it that way: I am not a native english speaker. > > Imagine a world in the multiverse where the French retained their > colonies instead of the British empire. French would be the dominant > language of that blue marble. Programming languages would use french > words. Someone from the tiny leftover remnants of the British empire > would post in the linnaeus-sdfr@ (système de fichiers réseau, AKA NFS) > mailing list, and that post would be called "a whine", because his > French is not perfect... > > > > > Also the request for "training material" for individual NFSv4.2 > > operations does not make sense. We do not have training material for > > the NFSv3 READDIRPLUS procedure, for example. > > > > Therefore I ignored the email. > > OK, but as an analog: SMB is infamous for "too many" features, all > which can cause trouble. Over time SAMBA added controls to turn > features on/off or use different ways of emulation. So far NFSv4.2 Apologies, that should have been "the LINUX NFSv4.2 server implementation" > has > no controls to turn specific features on/off, or even get statistics, > or put limits on certain features. > > That IS a problem, which SAMBA and even Windows Server SMB have > solved. Otherwise you're at the mercy of whatever combination of NFS > client and NFS server you have, and that is NOT good. > > Aurélien > -- > Aurélien Couderc <aurelien.couderc2002@xxxxxxxxx> > Big Data/Data mining expert, chess enthusiast Aurélien -- Aurélien Couderc <aurelien.couderc2002@xxxxxxxxx> Big Data/Data mining expert, chess enthusiast
