Archive:SAP Hana Backup
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- 1 Installation
- 2 Backup
- 3 Restore and Disaster Recovery
- 4 Troubleshooting
Technical advantages of using the SEP sesam HDBBackint integration to backup your SAP HANA Database
- Certified and supported by SAP
- Data consistency checks on block level
- Ease of use due to integration into SAP HANA Studio
- Integration into your existing backup infrastructure
- Additional features like deduplication
- Backups are immediately available for recovery
- Only allocated data size has to be backed up
- High automation possible
Prerequisites for the installation of the SEP sesam SAP HANA Backup Module
- Installed SAP HANA database
- SEP sesam backup client for Linux version >= 184.108.40.206 installed on the SAP HANA server (>=220.127.116.11 for IBM ppc64)
- Regular file backups must be working (an example backup of /etc has to be successful)
On the SEP sesam server
- Add the SAP HANA server as a backup client in the SEP sesam GUI
- To avoid problems, please ensure that SEP sesam file backups work
- The files are located in the following directories:
- Global config files:
- Local config files (on each Host):
- Global config files:
- As backup source, you may enter anything (we recommend that you insert the HANA DB SID here).
- The data that actually is saved depends on the respective SAP HANA backup calls (e.g. FULL, DIFF, INC).
- The task created in this step can't be used for regular file backups. It's necessary only for enabling the SEP sesam server to accept backups from the SAP HANA system.
On the database server
To install all needed files and symlinks automatically, please execute the script sm_install_saphana from the SEP sesam bin directory (default:
/opt/sesam/bin/sesam) and continue with the configuration section further below. This one-line installation utility can also be used for automatic rollout purposes.
If errors occur during the installation, please proceed to the manual installation section of this guide. If you're using Multi-Tenancy, please double-check the backint settings in SAP HANA Studio as shown in the section On database level (via SAP HANA Studio).
Usage of sm_install_saphana:
-h, --help show this help message and exit -C <server hostname> SEP Sesam Server hostname -j Backup task name -m <mediapool> Target media pool for DB backup -l <mediapool> Target media pool for log backup -S <rds hostname> SEP Sesam Remote Device Server -d <drivenum> SEP Sesam drive number -M SAP HANA Multitenancy -s <SID name> SAP HANA SID -i <instance number> SAP HANA Instance Number -u <username> SAP HANA Backup User -p <password> SAP HANA Backup User Password -n <hostname> SAP HANA Hostname (hdbsql connection)
You can proceed to the Configuration section below after executing the installation routine.
Manual Installation of the SAP HANA module on the database server
Note: These instructions work with the default SAP HANA directories. You may have to adjust every path in the commands to the path you used in a customized installation.
- Create the directories needed for the hdbbackint binary and utility file:
- Copy the parameter file template from the
skel/templatesto the SEP sesam ini directory
- Adjust the permissions of the SEP sesam logging directory
- Create a symbolic link from
/opt/sesam/bin/sesam/hdbbackintto the directory where SAP HANA expects the backint executable.
Usually root permissions are required to do this. The configuration has to be adjusted accordingly. The file must be executable for the SAP HANA user.
- Create another symbolic link from
/var/opt/sesam/var/ini/backint_saphana.utlto the directory where SAP HANA expects the parameter file:
- Check if the programs sbc and sbc_com_interface in the directory
<SESAM DIR>/bin/sesamare executable for the SAP HANA user.
- Repeat steps 1-6 on every node of a scale-out system if given.
root@hanasrv:~# mkdir -p /usr/sap/<SID>/SYS/global/hdb/opt/hdbconfig
root@hanasrv:~# cp /opt/sesam/skel/templates/backint_saphana.utl /var/opt/sesam/var/ini/
root@hanasrv:~# chmod 777 /var/opt/sesam/var/log/lgc
root@hanasrv:~# ln -s /opt/sesam/bin/sesam/hdbbackint /usr/sap/<SID>/SYS/global/hdb/opt/hdbbackint
root@hanasrv:~# ln -s /var/opt/sesam/var/ini/backint_saphana.utl /usr/sap/<SID>/SYS/global/hdb/opt/hdbconfig/
On the SAP HANA server
If you have used the sm_install_saphana setup utility to install the module, this is just for your information. The parameter file has already been generated and registered for you, according to the values you entered during the execution of the script. You may have to go through these steps if some of the criteria for the automatic installation couldn't be met.
All specified parameters are case sensitive!
You can use different parameter files for different purposes (e.g. to store backups in different media pools). The parameter file used is declared by the -P PARAMETERFILE option for hdbbackint. During installation, a template parameter file has been copied to
/var/opt/sesam/var/ini/backint_saphana.utl. This file is used in this guide, so if you're installing the extension, you'll have to edit this file and adjust the parameters to your environment.
At least the following entries are mandatory to be configured in the parameter file:
- SESAM_SERVER=<Sesam Server>
- Hostname of the SEP sesam Server you want to send the backup to
- SESAM_JOB=<Sesam SAP Client Task>
- Name of the backup task created during configuration
- SESAM_DRIVE=<Sesam Drive Number>
- Number of the SEP sesam drive that you want the backup to be written to
- SESAM_POOL=<Sesam Mediapool>
- Exact name of the SEP sesam media pool that you want to store the backup in
- SSB_LOGFILE=<Log file name>
- Full path of the sesam backint log file
|Instead of having only one large log file, you can get a new log file from backint by specifying a date identifier in the log file name. The strftime function is used for expansion. The $u token is replaced by SAP DB user, set from SAP side in backint call.
Further optional configuration parameters are:
- Full path of the SEP sesam backup client executable. It only has to be set if the standard sbc can not be used.
- PORT=<Sesam Server Communication Port>
- Only necessary if the STPD port was changed during the installation of the SEP sesam server.
- SESAM_TAPESERVER=<Remote device server>
- Hostname of the RDS that you want to send the backup to. The backup net to be used can be chosen by this entry. Please note that the hostname entered here has to match the hostname of the device server which is visible in the used drive's properties!
Example of a parameter (.utl) file in
SESAM_SERVER=diagnostix SESAM_JOB=sep-hana-sesam-data SESAM_DRIVE=2 SESAM_POOL=Daily SSB_LOGFILE=/var/opt/sesam/var/log/lgc/backint_saphana.log
SESAM_SERVER=diagnostix SESAM_JOB=sep-hana-sesam-log SESAM_DRIVE=2 SESAM_POOL=Daily SSB_LOGFILE=/var/opt/sesam/var/log/lgc/backint_saphana_log.log
On database level (via SAP HANA Studio)
If you have used the script sm_install_saphana setup utility to install the module, this is just for your information. The parameter file has already been generated and registered for you by the script, according to the values you entered during its execution.
- Start SAP HANA Studio and double-click Backup in the systems view on the left
- Select Configuration and expand Backint Settings
- Insert the path to the backint parameter file (backint_saphana.utl) as shown here:
- After making these adjustments, save the configuration and close the Backup tab.
--> Backint Agent should be
You can use one of the following pathes to specify the parameter file copied during the installation:
This complies to the recommendations from the SAP HANA Administration Guide regarding the configuration of third-party backup tools.
There are different ways to start (and schedule) backups of the SAP HANA database. They all trigger one thing: A SQL statement to the HANA database. This section describes how to manually make backups using the SAP HANA Studio and how you can execute scheduled backups with SEP sesam.
|Backing up the backup catalog via Logbackup:|
We recommend to also backup the HANA logbackups with SEP sesam hdbbackint because they contain the HANA backup catalog. This catalog contains identifiers of all backups that have been made for this database. In case of a restore, SAP HANA checks the available data backups via the backup catalog from the log backup and provides the choice of data backups in the SAP HANA recovery assistant accordingly. If you choose to write the log backups to a different destination (e.g. filesystem), please make sure that these log backups are available in case of a restore.
Starting the first backup
Now that everything is set up, it's time to start a backup. To do so, open the SAP HANA Studio, right-click Backup under the desired system and select Back Up... from the context menu. The SAP HANA Studio backup wizard will open, guiding you through the steps to start a database backup. Remember to select Backint as backup target as shown in the screenshot below:
If this first backup finishes successfully, it's safe to proceed with the automation of the backup.
|If the first backup fails:|
If you have used sm_install_saphana to install the module and your backup fails, make sure that
Configuration of automatic backups
In general, there are several different ways to achieve the scheduling of SAP HANA backups. In this documentation, only the way to start a backup by calling a short script with a SEP sesam command event will be explained.
Database backup script
The following script is just an example and has to be adjusted to your needs. On execution, it triggers a full database backup using the backint interface configured earlier in this guide. Afterwards, it returns the exit code so that the command event will be shown with state "Error" if something goes wrong.
Create this script within using the for expl. vi hdbbackup.sh and insert the following lines
#!/bin/sh # Example script for starting a full SAP HANA database backup # Create a unique backup prefix using the current timestamp PREFIX="COMPLETE_DATA_BACKUP_`date "+%Y-%m-%d_%H-%M-%S"`_`hostname -s`" echo "Backup Prefix is: $PREFIX" # Start backup via hdbsql query echo "Starting backup via hdbsql..." /usr/sap/<SID>/HDB<InstanceNumber>/exe/hdbsql -i 0 -n localhost -u SYSTEM -p <password> "BACKUP DATA USING BACKINT ('$PREFIX')" # -i <instanceNumber>, -n <node>, -u <dbuser> # Multi Tenancy only: -d <database> has to be added and the SQL command is "BACKUP DATA FOR <tenant_db_name> USING BACKINT ('$PREFIX')" # Different possible backup levels are DIFFERENTIAL and INCREMENTAL. --> example: "BACKUP DATA DIFFERENTIAL [FOR <tenant_db_name>] USING BACKINT ('$PREFIX'_DIFF)" # Collect exit code of hdbsql and pass it as exit code of this backup script EXIT_CODE=$? exit $EXIT_CODE
The only line which has to be modified is
/usr/sap/<SID>/HDB<InstanceNumber>/exe/hdbsql -i 0 -n localhost -u SYSTEM -p <password> "BACKUP DATA USING BACKINT ('$PREFIX')"
- chmod 700 hdbbackup.sh
- cp hdbbackup.sh /opt/sesam/bin/sesam
Create a new command event: GUI -> Configuration -> Command -> see picture below (user must be root and command must be
For further information about how to configure a command event, please see this entry in the FAQ section and this section about creating a command event. In this case, the command event should execute the backup script as shown below:
For further information, please refer to the SAP HANA Administration Guide and the SAP HANA SQL and System Views Reference (SQL Statements -> BACKUP DATA).
Restore and Disaster Recovery
Recovering a SAP HANA instance can easily be accomplished using the SAP HANA Studio.
Single Schema Restore for SAP BusinessOne
Please note that SAP HANA does not support the selective restore of a single database schema into the database. While database schemas are used massively for multi-tenancy on hosted SAP BusinessOne installations, there is only one possibility to get back data in a single schema in case of a recovery.
- Prepare an SAP HANA installation as big in size as your productive one
- Restore the database as shown below
- Start the database in an isolated environment
- Export the schema you need to restore via SAP HANA Studio
- Import the schema data on the productive SAP HANA environment
Point-in-Time Recovery of a SAP HANA Database
- In case of a disaster, restore the operating system or start off with a fresh HANA installation and execute the SEP sesam HANA module installation as described above. Afterwards, right-click your server/instance in the Systems view and select Recover... Please note: Opening the recovery wizard will stop the database!
- In the wizard that opens, select the option desired (in this guide, we'll choose a point-in-time recovery because this will apply in most cases)
- After specifying the location of the log backup area, you can decide which backup should be used to restore. To ensure that the backup is still stored on the sesam media, you can select a backup and use the Check Availability button. This will trigger an inquire to the SEP sesam Server to see if the backup is still in the SEP sesam database (respectively on the media).
- The next step enables the user to let the system perform an availability check for log backups, trigger a purge of the log area during the restore if desired and install a new license key in case this restore goes to a fresh, plain system.
- Now, the summary with all the options made is displayed prior to starting the recovery:
- During the process, a status window will be displayed until the recovery is finished:
- When the procedure has been completed successfully, the database is ready for use again.
|Backint System Copy:|
The function Backint System Copy can be used to restore backups from a system with a different identifier (SID). A typical use case for this feature is to restore a data backup from the productive system to a test instance.
For troubleshooting SAP Hana backup issues, see SAP Hana Backup troubleshooting.