Hi, Are you guys affected by https://tracker.ceph.com/issues/57396 ? On Fri, 16 Sep 2022 at 09:40, ronny.lippold <ceph@xxxxxxxxx> wrote: > hi and thanks a lot. > good to stay not alone and understand some right :) > > i will also tell, if there is something new. > > > so from my point of view, the only consistant way is to freeze fs or > shutdown vm. > after that start journal mirroring. so i think, only journal can work. > > you helped me a lot, cause i had a major understanding problem. > > maybe i will start a new thread in the mailing list and will see. > > have a great weekend and hopefully a smooth job switching ... i know, > what you mean :) > > > ronny > > > Am 2022-09-15 15:33, schrieb Arthur Outhenin-Chalandre: > > Hi Ronny, > > > >> On 15/09/2022 14:32 ronny.lippold <ceph@xxxxxxxxx> wrote: > >> hi arthur, some time went ... > >> > >> i would like to know, if there are some news of your setup. > >> do you have replication active running? > > > > No, there was no change at CERN. I am switching jobs as well actually > > so I won't have much news for you on CERN infra in the future. I know > > other people from the Ceph team at CERN watch this ml so you might > > hear from them as well I guess. > > > >> we are using actually snapshot based and had last time a move of both > >> clusters. > >> after that, we had some damaged filesystems ind the kvm vms. > >> did you ever had such a problems in your tests. > >> > >> i think, there are not so many people, how are using ceph replication. > >> for me its hard to find the right way. > >> can a snapshot based ceph replication be crash consisten? i think no. > > > > I never noticed it myself, but yes it's written on the docs actually > > https://docs.ceph.com/en/quincy/rbd/rbd-snapshot/ (but on the > > mirroring docs this is not actually explained). I never tested that > > super carefully though and thought this was more a rare occurence than > > anything else. > > > > I heard a while back (maybe a year-ish ago) that there was some long > > term plan to automatically trigger an fsfreeze for librbd/qemu on a > > snapshot which would probably solve your issue (and also allow > > application level consistency via fsfreeze custom hooks). But this was > > apparently a tricky feature to add. I cc'ed Illya maybe he would know > > more about that or if something else could have caused your issue. > > > > Cheers, > _______________________________________________ > ceph-users mailing list -- ceph-users@xxxxxxx > To unsubscribe send an email to ceph-users-leave@xxxxxxx > _______________________________________________ ceph-users mailing list -- ceph-users@xxxxxxx To unsubscribe send an email to ceph-users-leave@xxxxxxx
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