Use the swift command-line client to analyze log files.
The swift client is simple to use, scalable, and flexible.
Use the swift client -o or
-output option to get short answers to
questions about logs,
You can use the -o —output option with a
single object download to redirect the command output to a
specific file or to STDOUT (-). The ability
to redirect the output to STDOUT enables you to pipe
(|) data without saving it to disk
first.

