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Function documentation Tips for Avoiding System Failures Locate the document in its SAP Library structure

Use

To reduce the probability of the system failing and to minimize its effects, you have the following options, among others.

·        Use different hard disks for the data and log areas.

·        Mirror the log area and the data area using hardware-based means, for example by using RAID-5 or RAID-1 systems. When you select the RAID system, see to it that the RAID Controller has a good write performance and that caches can still be saved to the hard disk even when there is a power cut.

·        If you are using fault-tolerant hardware, then extend the capacity only using the same type of hardware. For example, extend RAID-5 systems with RAID-5 systems only.

·        Choose suitable log settings for your database system:

¡        If hardware-based mirroring is not possible, then configure the log mode so that the log area is mirrored based on software.

¡        Switch off the overwrite mode for the log area.

¡        Always leave the redo log management switched on.

·        Create an individual backup and maintenance plan for your database system.

 

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