#!/bin/bash
cd /tmp && \
(pg_dumpall --globals-only > globals.sql) && \
psql -Atqc "SELECT datname FROM pg_database WHERE datallowconn AND datname NOT IN (''template0'')" | \
xargs -I{} -P4 sh -c "
  pg_dump -Fd -j 4 -d \"{}\" -f dump_{} &&
  tar -cf - dump_{} | zstd -19 -T0 > dump_{}.tar.zst &&
  rm -rf dump_{}
"