pg_rewind resynchronizes a PostgreSQL cluster with another copy of the cluster.

Usage:
  pg_rewind [OPTION]...

Options:
  -D, --target-pgdata=DIRECTORY  existing data directory to modify
      --source-pgdata=DIRECTORY  source data directory to synchronize with
      --source-server=CONNSTR    source server to synchronize with
  -n, --dry-run                  stop before modifying anything
  -P, --progress                 write progress messages
      --debug                    write a lot of debug messages
  -V, --version                  output version information, then exit
  -?, --help                     show this help, then exit

Report bugs to <pgsql-bugs@postgresql.org>.