Add the --fast option for gzip

Author: Swapnika-21

VERSION

@@ -1 +1 @@
-1.4.2
+1.4.4

mongodb_consistent_backup/Archive/Tar/TarThread.py

@@ -32,13 +32,15 @@ def run(self):
                     backup_base_name = os.path.basename(self.backup_dir)
 
                     log_msg   = "Archiving directory: %s" % self.backup_dir
-                    cmd_flags = ["-C", backup_base_dir, "-c", "-f", self.output_file, "--remove-files"]
+                    cmd_flags = ["-C", backup_base_dir, "-c", "-f", "-", "--remove-files"]
 
                     if self.do_gzip():
                         log_msg = "Archiving and compressing directory: %s" % self.backup_dir
-                        cmd_flags.append("-z")
-
-                    cmd_flags.append(backup_base_name)
+                        cmd_flags.append(backup_base_name)
+                        additional_flags = ["|", "gzip", "--fast", ">", self.output_file]
+                        cmd_flags.extend(additional_flags)
+                    else:
+                        cmd_flags.append(backup_base_name)
                     logging.info(log_msg)
                     self.running  = True
                     self._command = LocalCommand(self.binary, cmd_flags, self.verbose)