The location of the log files was set during the server installation (typically PureCM\logs). The number of stored log backups before the oldest one is deleted is set in the 'Stored Log Backups' policy as described in the section called “Defining a Policyset”. The log files can then be backed up using a backup program such as NTBackup on Windows or 'tar' on Unix. Applying a log file to recreate the database is described in the section called “Applying the Log File”.
Log files can be archived using with the TruncateDatabaseLogs() server trigger function as described in the section called “PureCM Server Functions”.