[Samba] rsync copy operation fails on a CIFS mount

[Rowland Penny]

On Fri, 2021-08-06 at 15:06 +0200, SZIGETVÁRI János via samba wrote:
> Hi Rowland and Nico,
> 
> I wasn't at all saying that the problem is rsync related. I just
> included
> its output and the error string for context.
> The whole thing seems to us as if something would go wrong between
> the
> kernel CIFS code and the remote Windows server providing the share,
> after a
> few hours into the copy operation.
> 
> Unfortunately this is an appliance we are talking about, and we can't
> easily modify subcomponents to work entirely differently than before.
> Regarding the directory structure of the data we copy: we usually aim
> to
> move few or several directories every day, with each directory
> containing
> about 150 GB of data, with one larger file (around 100 GB in size),
> and
> 1000+ smaller files, with a size of below 100 MB each. Either way, we
> far
> from tens of thousands of files per directory.
> 
> The source files that are being moved are not in active use. We are
> talking
> about an archive job for files that are not being written to any
> longer.
> And even on the destination side, the only purpose of the storage
> server is
> to work as an off-appliance storage space, so neither the host, nor
> are
> other clients accessing the files on the destination side, while they
> are
> being copied or even afterwards.
> The archive jobs use locks to ensure that only one is running at a
> time,
> and execute sequentially if multiple jobs queue up.
> 
> So all in all, I would kindly ask for tips how to troubleshoot this
> problem, and whether a bug report should be opened for Samba or the
> kernel
> CIFS code, or if I should ask for help at one of the other samba-*
> mailing
> lists.
> 

I seem to remember saying that rsync has its own mailing list and so
has the CIFS protocol: http://lists.samba.org/pipermail/cifs-protocol/

It looks to myself that Samba has nothing to do with your problem (I
could be wrong). I think you need to ask on the cifs-protocol list,
they should be able to point you in the right direction, even if it is
back here.

Rowland