The oldname argument identifies the target archive, and may be either the basename that is common to all files in that archive or one of the archive's files. The new archive's basename is newname .
The -N option performs a dry-run, checking and reporting what changes would be made without making any changes.
Additional reporting verbosity may be requested with the -V option.
Because PCP archives are important records of system activity, special care is taken to ensure the integrity of an archive's files. For recoverable problems encountered during the execution of pmlogmv , all the files associated with oldname will be preserved, and no new files with the newname prefix will be created. ``Recoverable problems'' include signals that can be caught (such as SIGHUP, SIGINT, SIGQUIT and SIGTERM), permissions issues, new files already existing, file system full events, etc.
The implementation of pmlogmv uses hard links in the file system and so follows the semantic restrictions of ln (2) which for most systems means the directories containing both the oldname and the newname PCP archive files need to be writeable and within the same file system.