Archiving a file means committing the log file to the WORM state. You cannot use a log file after it is archived.
You can archive a log file automatically or manually. The logs are archived automatically when the size of the log file exceeds the size that is specified in the snaplock.log.maximum_size option.
However, you can also manually archive log files. Manual archiving is required in scenarios where you want to keep the privileged delete log records of certain files separately. You can use the snaplock log archive command to create a new log file, perform privileged delete, and then again archive the log file.