Archive:SAP ERP with Oracle

From SEPsesam
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Preface

When backup an SAP Oracle database the Sesam is used as Media Manager. Means, the SAP BR*Tools have the complete control over the backup and restore processes. SEP sesam provides its functions for storage and data storage in any medium, depending on the backup media and concept. Introductory information about the backup structure see SAP Description External Backup Programs.


Installation of the SEP sesam SAP R/3 Oracle Module

Prerequisites

  1. Installed Database SAP/R3 ORACLE DB at least Version 7.x with full functionality
  2. These Environment variables must be set for the SAP/R3 ORACLE DB:
    • ORACLE_SID
    • ORACLE_HOME
    • SAPDATA_HOME

Installation on the SAP R/3 Server in UNIX

  1. The regular SEP sesam Client for UNIX has to be installed on the SAP R/3 server.
  2. Unpack the tar-archive into a temporary directory. The archive contains these files:
    • backint
    • init.utl
  3. Copy the file backint into ORACLE program files folder /usr/sap/<ORACLE SID>/SYS/exe/run. If there already is a backint file, rename it first. This File has to be executable for the Oracle SAP R/3 User.
  4. Check if the program sbc_com_interface is executable for the ORACLE user in the directory <SESAM DIR>/bin/sesam.
  5. The file init.utl has to be copied to $ORACLE HOME/dbs/init<ORACLE SID>.utl for the ORACLE DB

Installation on the SAP R/3 Server in Windows

  1. The normal SEP sesam backup client for Windows has to be installed on the SAP R/3 Server
  2. Unpack the zip-archive into a temporary folder. The archive contains the following files:
    • backint.exe
    • init.utl
  3. Copy the file backint.exe into the respective program directory. For ORACLE this is <SAP MNT>/%ORACLE SID%/SYS/exe/run. If there already is a \backint\ rename it first.
  4. The file init.utl must be copied to %ORACLE_HOME%\databases\init%ORACLE SID%.utl and the directory %ORACLE_HOME%\saptrace i.e. %SAPDATA_HOME%\saptrace has to be created.
  5. The user who perform the BR*tools has to be member of the local administrator group and/or has to have explicit the SeSecurityPrivilege right. (see also under troubleshooting)

Configuration on the SEP sesam Server

  1. The SAP R/3 server has to be added as a client on the SEP sesam Server.
  2. A path backup task has been finished successfully to check the communication from Sesam server to backup client.
  3. Additionally, at least one task with the task type SAP R/3 has to be created for the SAP R/3 server. You can also configure more tasks e.g. to distinguish database backups from archivelog backups. The entry for source can be chosen freely. What data is actually backed up only depends on the respective SAP R/3 backup call. This task can't be used for regular backups. As source you enter the Oracle SID, e.g. CER.


Configuration on the SEP sesam SAP/R3 Oracle client

In order for SAP R/3 to use the backint gateway the following entries have to be changed in the SAP profile file init<ORACLE_SID>.sap in the case of ORACLE. 

 backup_dev_type= util_file #configure Backup Device Type
 util_par_file= $ORACLE HOME/dbs/init<ORACLE SID>.utl

Several SAP R/3 profiles can be created and used for backup/restore. Again, various util_par_file parameters can be set for them. With this you can, for example, use different SEP sesam drives for different backup levels. At least the following entries have to be set in the util_par_file (e.g. $ORACLE HOME/dbs/ini<ORACLE SID>.utl):

  • SESAM_SERVER = <SEP sesam Server> Name of the SEP sesam Server you want to back up on.
  • SESAM_JOB = <Sesam SAP Client Task> The name of the already configured backup task.
  • SESAM_DRIVE = <Sesam Drive Number> Number of the drive that you want to back up on.
  • SESAM_POOL = <Sesam Mediapool> Name of the SEP sesam media pool that you want to back up on.

Further optional configuration-parameters:

  • SBC = <SESAM_PATH> Full path of the SEP sesam backup program. Only has to be set if the standard sbc is being used.
  • PORT = <Sesam_Server_Communication_Port> only necessary if the STPD port was changed during the installation of the SEP sesam server.
  • SESAM_TAPESERVER = <Tapeserver> IP-Name of the tapeserver that you want to back up on. The backup net that you want to use can be chosen with this entry.

Log Files SAP R/3 on ORACLE

The following log files are written by the individual SEP sesam SAP R/3 backup modules in $ORACLE HOME/saptrace i.e. $SAPDATA HOME/saptrace:

BACKINT

Name: backint_<ORACLE_SID>.log

Max. Log Levels: 3 (ERROR, WARNING, INFO)

Description: Message if the backint program

SBC

Name: sbc_<ORACLE_SID>.log

Max. Log Levels: 6

Description: Messages of the SEP sesam backup client

init<ORACLE_SID>.utl: SBC TRACE LEVEL (default: 2)

SBC_COM_INTERFACE

Name: sbc_com_<ORACLE_SID>.log

Max. Log Levels: 3 (ERROR, WARNING, INFO)

Description: Logging of the sbc_com_interface program

init<ORACLE_SID>.utl: SBC_COM_TRACE_LEVEL (default: 0)


BR*Tools Calls for SAP/R3 on ORACLE DB

BRBACKUP

  • complete offline backup
 brbackup -d util_file -t offline -m all [-u internal/passwd] [-c]
  • complete online backup
 brbackup -d util_file_online -t online -m all [-u internal/passwd] [-c]
  • complete online backup with specific or different parameter file
 brbackup -d util_file_online -t online -m all [-u internal/passwd] [-c] -p F:\sap\oracle\CER\11201\database\initCERsep.sap
  • partial offline backup
 brbackup -d util_file -t offline -m PSAPSTABI,PSAPPOOLD[,TBLSP3, ...]
  • partial online backup
 brbackup -d util_file -t online -m PSAPSTABI,PSAPPOOLD[,TBLSP3, ..]
  • partial online backup with a dynamic BEGIN/END BACKUP switch
 brbackup -d util_file_online -t online -m PSAPSTABI,PSAPPOOLD[,TBLSP3, ..]

BRARCHIVE

  • Backup offline redo Log-Files
 brarchive -d util_file -s
  • Copy and delete the backed up offline redo log files and back up the new redo logs
 brarchive -d util_file -cd

BRRESTORE

  • full restore of the offline backup a after full offline backup
 brrestore -d util_file -b last -m full
  • full restore of the redo log full online backup after a full online backup (with dynamic switch)
 brrestore -d util_file -b last -m all
  • partial restore of the partial offline backup into a different restore rirectory
 brrestore d util_file -b <part offline back log> -m PSAPSTABI=<restore directory>
  • restore of the offline redo Log-Files written between the partial offline and partial online backup
 brrestore -d util_file -a <log nr2>-<log nr5>=<restore directory>


Note

In some cases the restore of single tablespaces or offline redo logs (partial restore) with the br* utilities does not execute a RECOVERY but a RESTORE. If this is the case the database can't be started. Then the database has to be started with:

  1. (login as internal)
  2. shutdown instance
  3. startup open recover

NAS/SAN extension for ORACLE

For backups in NAS/SAN environments SEP AG provides the possibility to store the data to a directly connected NAS/SAN device. That means the data communication work on the database server and the data transfer works on a dedicated server on which the data stand by in a identical way. The backup related load (network resp. cpu) will be displaced to the dedicated server. For this kind of backup a special license is necessary. In the file util_par_file (e.g. $ORACLE_HOME/dbs/ini<ORACLE_SID>.utl) the additional entry SESAM_REMOTE_CLIENT has to be configured:

SESAM_REMOTE_CLIENT=<Remote Client>
Name of the client where from the identical NAS/SAN data will be backed up.


Troubleshooting

Additional Links/Literature

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