"Zwettler Markus (OIZ)" <Markus.Zwettler@zuerich.ch> writes: > I don't want to do use the normal backup algorithm where pg_start_backup + pg_stop_backup will fix any fractured block and I am required to have all archived logfiles, therefore. > I want to produce an atomic consistent disk snapshot.
[ shrug... ] You can't have that. [snip]
The only way you could get a consistent on-disk image is to shut the server down (being sure to do a clean not "immediate" shutdown) and then take the snapshot.
I think you could work around that by taking a dirty snapshot, making a writable filesystem from it, waiting until you've archived enough WAL to get that to a consistent state, and then firing up a temporary postmaster on that filesystem to go through recovery and shut down cleanly.