Jacob Champion <pchampion@vmware.com> writes:
> Right. What I'm worried about is, if disk space or write performance on
> the new cluster is a concern, then having a copy-mode upgrade silently
> use copy-on-write could be a problem if the DBA needs copy mode to
> actually copy.
Particularly for the cross-filesystem case, where it would not be
unreasonable to expect that one could dismount or destroy the old FS
immediately afterward. I don't know if recent kernels try to make
that safe/transparent.
regards, tom lane
