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Dear All,<br>
<br>
We sometimes have to replicate large "live" filesystems with many (
sometimes millions, up to few hundred millions ) files on them. (
Copying actively used files is of course a bad idea, but it really
helps to keep the delta small, so one final transfer can later save
the day. )<br>
<br>
The problem, as one may guess, is that some files may disappear
during the process, so rsync finishes with an error code 23.<br>
The good news is that since version 3.1.0 rsync has two options to
address this problem: --ignore-missing-args and
--delete-missing-args .<br>
<br>
The bad news, however, is that even with any of these, when the file
disappears, rsync handles the file transfer properly, but then tries
to set times or attributes on these files nevertheless. That fails
with errno 22 ( EINVAL ) and still leads to exit code 23, which is a
bit of an annoyance.<br>
<br>
I am currently trying to come up with a patch to address this issue,
since I'd like to have exit code 0 for either of
--ignore-missing-args or --delete-missing-args, when the files are,
well, missing.<br>
<br>
Probably it is not the right way to address this problem, but in the
same vein as --ignore-missing-args are implemented, the patch can go
as follows:<br>
<a class="moz-txt-link-freetext" href="https://gist.github.com/anonymous/96ba8bf10f864a93fd9203f75c43ffe9">https://gist.github.com/anonymous/96ba8bf10f864a93fd9203f75c43ffe9</a> .<br>
<br>
Basically we need to do two changes: <br>
<br>
(1) in options.c, make sure that the "missing_args" value is
transferred when set ; and <br>
(2) in rsync.c, in the "missing_args" case, replace FERROR_XFER with
something else, since apparently any log message with logcode
FERROR_XFER sets the flag 'got_xfer_error' in log.c, and that
finally leads to exit code RERR_PARTIAL (23), which is what we are
trying to avoid.<br>
<br>
I am currently testing this on fairly big datasets to see if there's
something missing, and will write more when I see how it goes ( as I
said, the data sets are fairly large ).<br>
<br>
There shall be a better way to address that, but this is all I can
do with a very shallow acquaintance with rsync source code.
Nevertheless, it would be great if that could be fixed in the trunk
one way or another )<br>
<br>
Kind regards, George<br>
<br>
<pre class="moz-signature" cols="72">--
George Fedorov
Senior Systems Specialist
Melbourne School of Engineering
The University of Melbourne, Victoria 3010, Australia
phone: *****
email: *****
<a class="moz-txt-link-freetext" href="http://www.eng.unimelb.edu.au/">http://www.eng.unimelb.edu.au/</a>
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