On Tue, Jan 5, 2021 at 9:01 AM Wissem MIMOUNA <wissem.mimo...@fiducialcloud.fr> wrote: > > Hi , > > Thank you for your feedback . It seems the error related to the fstrim run > once a week ( default ) .
Do you have object-map enabled? If not, the FS will gladly send huge discard extents which, if you have a large volume, could result in hundreds of thousands of ops to the cluster. That's a great way to hang IO. > Do you have more information about the NBD/XFS memeory pressure issues ? See [1]. > Thanks > > -----Message d'origine----- > De : Jason Dillaman <jdill...@redhat.com> > Envoyé : mardi 5 janvier 2021 14:42 > À : Wissem MIMOUNA <wissem.mimo...@fiducialcloud.fr> > Cc : ceph-users@ceph.io > Objet : Re: [ceph-users] Timeout ceph rbd-nbd mounted image > > You can try using the "--timeout X" optional for "rbd-nbd" to increase the > timeout. Some kernels treat the default as infinity, but there were some > >=4.9 kernels that switched behavior and started defaulting to 30 seconds. > There is also known issues with attempting to place XFS file systems on top > of NBD due to memory pressure issues. > > On Tue, Jan 5, 2021 at 4:36 AM Wissem MIMOUNA > <wissem.mimo...@fiducialcloud.fr> wrote: > > > > Hello , > > > > Looking for information about a timeout which occur once a week for a ceph > > rbd image mounted on a machine using rbd-nbd (Linux Ubuntu machine). > > The error found in 'dmseg' is below : > > [798016.401469] block nbd0: Connection timed out [798016.401506] block > > nbd0: shutting down sockets > > > > Many Thanks > > _______________________________________________ > > ceph-users mailing list -- ceph-users@ceph.io To unsubscribe send an > > email to ceph-users-le...@ceph.io > > > > > -- > Jason > [1] https://tracker.ceph.com/issues/40822 -- Jason _______________________________________________ ceph-users mailing list -- ceph-users@ceph.io To unsubscribe send an email to ceph-users-le...@ceph.io
