On Tue, Aug 2, 2022 at 6:44 AM Chitvan Chhabra <chitvan1...@gmail.com> wrote: > > Though i could be wrong here , but what i understand is: > > After Roll back Scenerio: > > A( Primary Snapshot rollbacked to time: say 12:10:00 PM) , B(Secondary > Snapshot roll backed to time say 12:09:00 PM)
Yes. > > Current time say : 12:30:00 PM > Now A must have received acks(in the past of ofcource) from B between > 12:09:00 to 12:10:00 PM , now at 12:09:01 B says i dont have the data which > might have confused A as it must be saying saying that you have already acked > me few data , then how can you say now that i don't have the data now.Hence > the Error.This is just my thought.Or does DRBD support such scenario, if yes > then that is awesome than as that prevent complete resynchronization of data. Normally, yes this works and it's just as awesome as it sounds. But in this particular case, it's utterly broken. With the resource down on both nodes, trying to raise it on either basically wigs out and says "what is this block device?" Any calls to drbdadm, drbdmeta, etc, result in a couple dozen "extent beyond end of bitmap" error messages. Rolling back to an older snapshot results in the exact same error messages, which was quite unexpected. > > Anyways with DRBD Down , you can always get the data back from ZVOL > snapshot(otr its clone) itself(assuming DRBD metadata doesnot contain actual > data ?? ) Yes, I was able to create a new DRBD resource and copy my data into it... but the initial sync for this resource takes 3-4 days... and I don't want to have to do that all the time. > > > > > On Tue, 2 Aug 2022 at 15:04, Roland Kammerer <roland.kamme...@linbit.com> > wrote: >> >> On Tue, Aug 02, 2022 at 02:54:02PM +0530, Chitvan Chhabra wrote: >> > Unable to see the older thread.May Be it is just me.Request to share older >> > conversation as well please. >> >> we have an archive: >> https://lists.linbit.com/pipermail/drbd-user/2022-July/026252.html >> _______________________________________________ >> Star us on GITHUB: https://github.com/LINBIT >> drbd-user mailing list >> drbd-user@lists.linbit.com >> https://lists.linbit.com/mailman/listinfo/drbd-user > > _______________________________________________ > Star us on GITHUB: https://github.com/LINBIT > drbd-user mailing list > drbd-user@lists.linbit.com > https://lists.linbit.com/mailman/listinfo/drbd-user -- Michael D Labriola 401-316-9844 (cell) _______________________________________________ Star us on GITHUB: https://github.com/LINBIT drbd-user mailing list drbd-user@lists.linbit.com https://lists.linbit.com/mailman/listinfo/drbd-user
