Error loggingEdit online The Cluster Test Tool has several useful functions that enable you to work with logs. Log filesIf a test fails, the Cluster Test Tool collects information in the automatically created log files. To collect logs, the Cluster Test Tool creates the directory /var/hacmp/cl_testtool if it doesn't exist. PowerHA® SystemMirror® never deletes the files in this directory. You evaluate the success or failure of tests by reviewing the contents of the Cluster Test Tool log file, /var/hacmp/cl_testtool.Log file exampleThis topic discusses the log file in depth.The hacmp.out fileThe hacmp.out file also logs the start of each test that the Cluster Test Tool runs on each cluster node.Verbose loggingBy default, the Cluster Test Tool uses verbose logging to provide a wealth of information about the results of cluster testing. You can customize the type of information that the tool gathers and stores in the Cluster Test Tool log file.Customizing the types of information to collectYou can customize the types of logging information to be gathered during testing.Adding data from hacmp.out to the cluster test tool log fileYou can add messages that include specified text in the hacmp.out file to the Cluster Test Tool log file.Redirecting all log files to a single directoryThis SMIT panel allows you to specify a directory in which to move current logs and redirect future log content.First failure data captureTo prevent loss of critical diagnostic data after a software or node failure, the cluster startup sequence has been enhanced to capture diagnostic data in the /tmp/ibmsupt/hacmp/ffdc.<timestamp> directory when a previous failure is being recovered. Only one of these FFDC data captures are retained in case of multiple failures.Parent topic: Testing a PowerHA SystemMirror cluster