Planning for journal management

This topic provides you with the information you need to ensure you have enough disk space, to plan what objects to journal, and to plan which journaling options to use.

Before you start to journal an object, you must make decisions that will determine how you will create journals and receivers, what objects to journal and how to journal those objects. These decisions include:

• Whether to use System i® Navigator to set up your journaling environment.
• What objects to protect with journaling.
• Whether to journal other objects that the system does not journal.
• Whether to combine journaling with the save-while-active function.
• How many journals you need and which objects must be assigned to each journal.
• Whether to journal after-images only or both before-images and after-images.
• Whether your application programs must write journal entries to assist with recovery.
• What type of disk pool in which to store your journal receiver.
• Whether to use the remote journal function to replicate the journal entries and receivers to one or more additional systems.
• Whether to omit the optional open, close, or force entries for your objects.

You also need to make operational decisions about journal management:

• How often must journal receivers be changed and saved?
• How often must you save journaled objects?
• How must journals and journal receivers be secured?

Finally, you need to balance the benefits of journaling with the affect it may have on your system performance and auxiliary storage requirements.

Use the following information to help you make these decisions: