On Fri, Apr 03, 2020 at 10:19:21AM -0400, Robert Haas wrote:
> What I'm thinking about is: suppose we add an option to pg_basebackup
> with a name like --pipe-output. This would be mutually exclusive with
> -D, but would work at least with -Ft and maybe also with -Fp. The
> argument to --pipe-output would be a shell command to be executed once
> per output file. Any instance of %f in the shell command would be
> replaced with the name of the file that would have been written (and
> %% would turn into a single %). The shell command itself would be
> executed via system(). So if you want to compress, but using some
> other compression program instead of gzip, you could do something
> like:
>
> pg_basebackup -Ft --pipe-output 'bzip > %f.bz2'
Seems good to me. I agree -Fp is a "maybe" since the overhead will be high
for small files.