Manual balancing
Manual balancing means that you manually group files into subsets, which are then
backed up in parallel. To group files into subsets, add the manual_balance section
to the Data Protector SAP R/3 configuration file as described in the following example.
Example
Suppose that we have a backup specification named SAP-R3 with the following files
to be backed up: fileA, fileB, fileC, fileD . To group the files into three
subsets (0={fileA, fileC}, 1={fileB}, 2={fileD}), add the following lines
to the Data Protector SAP R/3 configuration file:
manual_balance={
SAP-R3={
fileA=0;
fileB=1;
fileC=0;fileD=2;}}
When you group files into subsets, consider the following:
• Use only one file from the same hard disk at a time.
• The number of files in a subset must be equal to or smaller than the sum of the
concurrencies of all devices specified for backup.
• If the backup specification contains files that are not allocated to any subset, Data
Protector automatically adds these files to the list of files to be backed up using
the load balancing principle. Before the backup, this list is logged in:
UNIX:
ORACLE_HOME/sapbackup/.*.lst
Windows:
SAPDATA_HOME\sapbackup\*.lst
Restore
You can restore SAP R/3 objects using any of the following methods:
• Standard restore: Data is restored from backup media created in ZDB to tape,
ZDB to disk+tape, and non-ZDB (standard backup) sessions. See “Standard
restore” on page 216.
• Instant recovery: Data is restored from a replica created in online ZDB–to–disk
or ZDB–to–disk+tape sessions. See “Instant recovery” on page 221.
After the restore, you can recover the database to a specific point in time using the
SAP BRTOOLS interface. Instant recovery method enables you to restore and recover
Data Protector SAP R/3 ZDB integration214
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