On Thu, May 4, 2023 at 11:27 AM Kamil Madac <kamil.madac@xxxxxxxxx> wrote:
>
> Thanks for the info.
>
> As a solution we used rbd-nbd which works fine without any issues. If we will have time we will also try to disable ipv4 on the cluster and will try kernel rbd mapping again. Are there any disadvantages when using NBD instead of kernel driver?
Ceph doesn't really support dual stack configurations. It's not
something that is tested: even if it happens to work for some use case
today, it can very well break tomorrow. The kernel client just makes
that very explicit ;)
rbd-nbd is less performant and historically also less stable (although
that might have changed in recent kernels as a bunch of work went into
the NBD driver upstream). It's also heavier on resource usage but that
won't be noticeable/can be disregarded if you are not mapping dozens of
RBD images on a single node.
Thanks,
Ilya
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