Re: Consistency checks / svnadmin dump/verify
hello Andreas, many thanks for the quick answer. I found this link: https://svnbook.red-bean.com/en/1.7/svn.ref.svnadmin.c.verify.html which states "... This basically iterates through all revisions in the repository by internally dumping all revisions and discarding the output—...". which leads me to think that "svnadmin dump" does the same checks as "svnadmin verify". Anyway, I do get your point that it is a good idea to "load" the repos every month or so. Many Thanks and Best Regards, Felix On 28.09.23 18:51, Andreas Stieger wrote: On 2023-09-28 17:28, Felix Natter wrote: So the question is: Does "svnadmin dump" do some consistency checks (like svnadmin verify does)? Probably not. Specifically it does not *test* that the dump can be loaded. Although that would certainly be a bug. I actually do not think that this is the best way of thinking about this. Maybe you should be thinking about "backup verification" instead? Start from the backup result (the compressed data), and regularly ensure it can be loaded and verified. Regarding "svnadmin verify path/on/server": Can I be sure that this does not modify the data? It is read-only. Or do I have to use "svnadmin load" (on another machine), does "load" do more consistency checks? I do recommend to use "svnadmin load" as a signal that the backup can actually be restored. Andreas -- *SIDACT GmbH Simulation Data Analysis and Compression Technologies * *Felix Natter* /Software Developer / Auguststraße 29 53229 Bonn Germany Phone : +49 228 5348 0430 Direct : +49 228 4097 7118 Email : felix.nat...@sidact.com Web : http://www.sidact.com/
Re: Consistency checks / svnadmin dump/verify
On 2023-09-28 17:28, Felix Natter wrote: So the question is: Does "svnadmin dump" do some consistency checks (like svnadmin verify does)? Probably not. Specifically it does not *test* that the dump can be loaded. Although that would certainly be a bug. I actually do not think that this is the best way of thinking about this. Maybe you should be thinking about "backup verification" instead? Start from the backup result (the compressed data), and regularly ensure it can be loaded and verified. Regarding "svnadmin verify path/on/server": Can I be sure that this does not modify the data? It is read-only. Or do I have to use "svnadmin load" (on another machine), does "load" do more consistency checks? I do recommend to use "svnadmin load" as a signal that the backup can actually be restored. Andreas
Consistency checks / svnadmin dump/verify
Dear subversion community, as part of a daily backup process, I do "svnadmin dump"s, gzip them and create several encrypted backups of the "*.dump.gz". Now, the svn admin dump step (svnadmin dump -q ...) worked without errors (exit code 0 and no errors on stdout/stderr), and during the next step (encrypted backup) the VM crashed. When looking into the log, I see that there was an I/O error on the disk which is used by the VM. Now I now that the foo.dump.gz are correctly backed up, but are they consistent (i.e. not affected by the I/O error(s))? So the question is: Does "svnadmin dump" do some consistency checks (like svnadmin verify does)? Regarding "svnadmin verify path/on/server": Can I be sure that this does not modify the data? Or do I have to use "svnadmin load" (on another machine), does "load" do more consistency checks? Many Thanks(!) and Best Regards, Felix -- *SIDACT GmbH Simulation Data Analysis and Compression Technologies * *Felix Natter* /Software Developer / Auguststraße 29 53229 Bonn Germany Phone : +49 228 5348 0430 Direct : +49 228 4097 7118 Email : felix.nat...@sidact.com Web : http://www.sidact.com/
