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Background documentation Log Settings Locate the document in its SAP Library structure

The following log settings are possible:

·         You can mirror the log area.

If you cannot use hardware-base mirroring for the log area, we recommend that you use the software-based mirroring setting. To make this setting, proceed as described in Log Mode.

If you only require a lower level of security for your system, you can also decide not to mirror the log area.

·         You can decide to do without log backups and use a non-standard log backup strategy by setting the overwrite mode for the log area accordingly.

Allow the log area to be overwritten only if all you require in the event of a database crash is for the system to be restored to the state of an existing data backup.

·         In very special situations, you can deactivate redo log management temporarily.

However, deactivating redo log management places the security of your system at serious risk, and should be considered only under exceptional circumstances.

See Background Knowledge: SAP DB: Activating or Deactivating Redo Log Management.

Combination of Log Settings

The combination of log settings you choose depends on your security requirements. In production database systems, you should aim for the highest possible security standards. In this case, make the following log settings:

·         Hardware-based mirroring of the log area

·         Use the standard log backup, that is, do not allow overwriting of the log area and perform regular log backups

·         Always leave redo log management activated

Note

For more information about logging, see Background Knowledge: SAP DB: Log Concept

 

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