Logs and journals

 

Protecting the data and system resources is a critical part of the operating system. One important way that the i5/OS^® operating system accomplishes that goal is to keep detailed records of any changes to system resources. These records, called logs or journals, can help solve system problems or recover damaged data.

 

Logs

A log is a database file that contains the history of backup, archive, recovery, and media management operations that can be displayed online or printed for future reference. Logs are used in backup and recovery situations. Logs can also contain information about jobs, general system information, and problems.

Table 1. Types of logs

Log	Description
Job logs	Track the description, status, and action of jobs performed by the system.
History logs	Get general system information, like device changes, operator messages, job completion and other activities.
Problem logs	Retrieve records of system problems that occurred on a system.

 

Journals

A journal is a system object that contains information about changes made to another system object. The journal can be used to recover database files, data areas, data queues, and integrated file systems objects. Regular journaling speeds up management tasks such as save operations.

 

Parent topic:

i5/OS concepts

Related concepts
Job logs History logs Problem logs Journal management

Related information
Backup and Recovery PDF