See what's new in SAP HANA SPS09 - Backup and Recovery

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SAP HANA SPS 09 - What’s New? Backup/Recovery
Andrea Kristen, SAP HANA Product Management November, 2014
(Delta from SPS 08 to SPS 09)

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Agenda
Backup
Recovery
Scale-out support
Database copy
Support for multitenant database containers
3rd party tool certification

3. Backup

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What’s New in SAP HANA SPS09: Backup and Recovery New alert: Runtime of the log backups currently running
A new alert notifies administrators when a log backup takes a long time
This enables administrators to detect issues with logs backup early, for example if there is a problem with a 3rd party backup agent.
Configuring the alert thresholds
Prerequisite: system privilege INIFILE ADMIN
1.In the Administration editor in SAP HANA Studio, open the Alerts tab and choose the (Configure...) button.
2.Open the Configure Check Thresholds tab and choose check 65.
3.Specify the threshold values.
–Default thresholds: 30 s / 300 s / 900 s
Switching off the alert
See SAP Note 1991615

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What’s New in SAP HANA SPS09: Backup and Recovery New alert: Enablement of automatic log backup
A new alert notifies administrators when automatic log backups have been disabled
Automatic log backups need to be enabled in production systems in order to provide full point- in-time recoverability.
Prerequisite for the alert: statistics server is running in embedded mode
The alert is executed every 15 minutes
Switching off the alert
Prerequisites:
oINIFILE ADMIN system privilege
osap.hana.admin.roles::Administrator role
1.In SAP HANA Cockpit, click on the Configure Checks tile
2.Set Schedule Active to NO

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What’s New in SAP HANA SPS09: Backup and Recovery New alert: Storage snapshot is prepared
A new alert notifies administrators when a storage snapshot was prepared but not confirmed for a longer period of time
Prepared storage snapshots should only exist for a short time (until the storage snapshot was executed using the storage tool).
Configuring the alert thresholds
Prerequisite: system privilege INIFILE ADMIN
1.In the Administration editor in SAP HANA Studio, open the Alerts tab and choose the (Configure...) button.
2.Open the Configure Check Thresholds tab and choose check 66.
3.Specify the threshold values.
–Default thresholds: 5 min / 15 min / 60 min
Switching off the alert
See SAP Note 1991615

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What’s New in SAP HANA SPS09: Backup and Recovery New Save button for configuration changes in SAP HANA Studio
A new button for saving the backup configuration was introduced
In earlier versions, saving was only possible via the general File menu
Saving the backup configuration
Prerequisite: system privilege BACKUP ADMIN
1.Open the Backup editor and choose the Configuration tab
2.Change the configuration as required and choose the (Save) button

8. Recovery

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What’s New in SAP HANA SPS09: Backup and Recovery Choose data backup for recovery via backup catalog
You can now choose the data backup for a “recovery to a specific data backup” from the backup catalog
In earlier versions you had to manually specify the location of the data backup
Recovery to a specific data backup
Prerequisites: <sid>adm operating system user credentials
1.In the Systems view in SAP HANA Studio, right-click on the system to be recovered and choose Recovery...
2.Select Recover the database to a specific data backup or storage snapshot
3.Select the data backup from the backup catalog
4.Specify further options and start the recovery

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What’s New in SAP HANA SPS09: Backup and Recovery Fewer log backups needed for recovery
When preparing a recovery, you now only need to provide the log backups up to the one that contains a COMMIT time stamp after the specified recovery point
You can use hdbbackupdiag to display the backups and/or snapshots required for a recovery of the database. This helps you to keep the quantity of the files that have to be made available to a minimum.
Finding out which log backups are required for a recovery
Prerequisites: You are logged on to the database server with the operating system user <sid>adm and have read authorization for the backup location. For more information, see the SAP HANA Administration Guide.
Example: Displaying backups needed to reach specified point in time /usr/sap/S41/SYS/exe/hdb>hdbbackupdiag -f -d /usr/sap/S41/HDB41/backup/log -u "2014-10-20 09:15:00" found backup catalog 1413788288630 from file /usr/sap/S41/HDB41/backup/log/log_backup_0_0_0_0.1413788288630 using backup catalog 1413788288630 from file /usr/sap/S41/HDB41/backup/log/log_backup_0_0_0_0.1413788288630 INITIAL_DATA_BACKUP_databackup_0_1 INITIAL_DATA_BACKUP_databackup_1_1 INITIAL_DATA_BACKUP_databackup_3_1 INITIAL_DATA_BACKUP_databackup_4_1 log_backup_1_0_886272_890688.1413788288333

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What’s New in SAP HANA SPS09: Backup and Recovery Recovery SQL statement displayed in the recovery wizard
You can now display the SQL statement for a specific recovery in SAP HANA Studio
Preparing a recovery
Prerequisites: <sid>adm operating system user credentials
1.In the Systems view in SAP HANA Studio, right-click on the system to be recovered and choose Recovery...
2.Specify your recovery options in the recovery wizard
3.On the Review Recover Settings page, choose Show SQL Statement

12. Database copy

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SAP HANA Backup and Recovery Database copy using 3rd party backup tools (I)
You can now carry out database copies using a 3rd party backup tool
In earlier versions, this was only possible using file system backups or storage snapshots.
Typical use case: copy of your production system for tests on a smaller QA system. Note that if the target system has less resources, e.g. less CPU and RAM, performance cannot be expected to be the same as in the source system.
Options
Using data backup + log backups of the source database  This allows you to restore the database to a point in time after the data backup
Using only a data backup of the source database  This restores the content exactly as of the point in time of the data backup or storage snapshot

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3rd Party Backup Server
SAP HANA Backup and Recovery Database copy using 3rd party backup tools (II)
Copying from a larger (m nodes) to a smaller system (n nodes) is supported for database copies using data backups. You need to configure (m-n) additional index servers in the target database.
Source database with n nodes (e.g. PROD)
Target database with 2 nodes (e.g. QA)
Node n
Index Server
Node 2
Index Server
Node 1
Index Server 1
Node 2
Index Server
Node 1
Index Server 1
Index Server 2
Data backup + log backups (optional)

15. Scale-out support

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What’s New in SAP HANA SPS09: Backup and Recovery No manual steps required after removing host/service
Removing a host/service has now been fully integrated into SAP HANA backup and recovery
In earlier versions, production had to be halted until a new data backup had been written that reflected the changed system landscape and served as the basis for subsequent point-in-time recoveries.
When a service is removed, SAP HANA now:
Automatically redistributes the data of the removed index server to the remaining index servers
Ensures that all log entries of the removed index servers and the topology changes are backed up
No manual data backup is needed any more after a host/service was removed

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What’s New in SAP HANA SPS09: Backup and Recovery Remove service using SAP HANA Studio
You can now remove a service using SAP HANA Studio
A customer may choose to remove a service that is not needed in a specific scenario. Example: remove additional index server after a database copy to a smaller system
Removing a service
Prerequisites:
oSystem privileges CATALOG READ, SERVICE ADMIN and RESOURCE ADMIN
oEXECUTE on procedure UPDATE_LANDSCAPE_CONFIGURATION
1.In the Administration editor in SAP HANA Studio, open the Landscape tab
2.Right-click on the service to be removed and choose Remove Service

18. Support for multitenant database containers

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What’s New in SAP HANA SPS09: Backup/Recovery Multitenant database containers: Overview
Multitenant database containers are a new way to run multiple applications/scenarios on one SAP HANA system
1 system database and multiple tenant databases
Shared installation of database system software
Strong isolation features, the system database and each of the tenant databases have their own:
–Database users, database catalog, repository, persistence, backups, traces and diagnosis files
Distinction between tasks performed at system level and those performed at database level
Integration with data center operation procedures
*tenant database = database container
Application 1
SAP HANA system
Application 2
Tenant database 1*
Tenant database 2
System database

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What’s New in SAP HANA SPS09: Backup and Recovery Multitenant database containers: Backup/recovery concept
Multitenant database containers follow the usual SAP HANA backup/recovery principles
Data backups are initiated manually or scheduled via scripts/tools such as DBA Cockpit
Log backups are carried out automatically if the log mode is set to NORMAL (recommended for production)
Backup information is stored in the backup catalog
Different backup destinations are supported: backups to the file system, backups to 3rd party backup tools
Database copies using backup/recovery are supported for individual databases
Recovery options: point-in-time recovery, recovery to a specific data backup
Tool support: SAP HANA Studio, DBA Cockpit, command line (SQL statements)
Specific properties of multitenant database container backup/recovery
The system database plays a central role. It can initiate both backups of the system database itself and of individual tenant databases. Recoveries are always initiated by the system database
Tenant databases can carry out their own backups unless this has been prohibited in the system configuration
System database and tenant databases have their own backup catalogs.
Snapshots are currently not supported

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What’s New in SAP HANA SPS09: Backup and Recovery Multitenant database containers: Backing up the system database
You regularly need to create data backups of the system database
The system database contains information about the system as a whole and all tenant databases and is used for central system administration.
Creating a data backup of the system database
Prerequisites: User in the system database with BACKUP ADMIN or BACKUP OPERATOR and CATALOG READ system privileges
1.In the Systems view in SAP HANA studio, right-click on the system database and choose Backup and Recovery  Backup Up System Database...
2.Specify your backup settings and start the backup

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What’s New in SAP HANA SPS09: Backup and Recovery Multitenant database containers: Backing up a tenant database
You regularly need to create data backups of the tenant databases
The tenant databases contain the business data. They have their own index servers.
Note: Depending on the system configuration, it may also be possible to initiate a data backup directly from a tenant database
Creating a data backup of a tenant database
Prerequisites: User in the system database with DATABASE ADMIN system privilege
1.In the Systems view in SAP HANA studio, right-click on the system database and choose Backup and Recovery  Backup Up Tenant Database...
2.Select the tenant database to be backed up
3.Specify your backup settings and start the backup

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What’s New in SAP HANA SPS09: Backup and Recovery Multitenant database containers: Viewing backup information
Backup information is contained in the backup catalog
Viewing information for all databases
Prerequisites: User in the system database with DATABASE ADMIN privilege; tenant database running
1.In the Systems view in SAP HANA studio, expand the system database and double-click on Backup
2.Open the Backup Catalog tab and select the database for which you want to view the information
Viewing information for a tenant database
Prerequisites: User in the tenant database with BACKUP ADMIN and CATALOG READ privileges
1.In the Systems view in SAP HANA studio, expand the tenant database and double-click on Backup
2.Open the Backup Catalog tab

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What’s New in SAP HANA SPS09: Backup and Recovery Multitenant database containers: Backup lifecycle management
You can delete backups that are not needed any longer
Deleting old backups
Prerequisites:
oTo delete system database backups: User in the system database with BACKUP ADMIN system privilege
oTo delete tenant database backups: User in the system database with DATABASE ADMIN system privilege
1.In the Systems view in SAP HANA studio, expand the system database and double-click on Backup
2.Open the Backup Catalog tab and select the database for which you want to delete backups
3.From the context menu, choose which backups you want to delete. Specify whether the backups should be deleted from the backup catalog only, or also from from the file system/3rd party backup tool

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What’s New in SAP HANA SPS09: Backup and Recovery Multitenant database containers: Recovering the system database
A recovery of the system database may be be needed, for example, if there are physical errors in the system database’s volumes
Recovering the system database
Prerequisites: <sid>adm user credentials
1.In the Systems view in SAP HANA studio, right-click on the system database and choose Backup and Recovery  Recover System Database...
2.Enter the <sid>adm credentials. The whole system will be shut down, including all tenant databases.
3.Specify your recovery type and further recovery settings and start the recovery. The system database will be recovered and restarted.
4.Restart the tenant databases. The tenant databases’ content is not affected by the system database recovery.

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What’s New in SAP HANA SPS09: Backup and Recovery Multitenant database containers: Recovering a tenant database
A recovery of a tenant database may be required, for example, if a logical error occurred in the tenant database
Recovery of tenant databases can only be initiated from the system database. The system database and other tenant databases are not affected.
Recovering a tenant database
Prerequisites: User in the system database with DATABASE ADMIN system privilege
1.In the Systems view in SAP HANA studio, right-click on the system database and choose Backup and Recovery  Recover Tenant Database...
2.Select the tenant database to be recovered
3.Specify your recovery type and further recovery settings and start the recovery.

27. 3rd party tool certification

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What’s New in SAP HANA SPS09: Backup and Recovery Backint Certification
Certification is an installation prerequisite for backup tools using the “Backint for SAP HANA” interface.
SAP Note 1730932 (Using backup tools with Backint)
Announcement of the certification process
Certified tools (as of 2014-10-13)
Online listing of certified tools: Application Development Partner Directory
Enter the search term HANA-BRINT and click on a partner name  ”SAP Certified Solutions” for further details
Vendor
Backup Tool
Support Process (SAP Notes)
Commvault
Simpana 10.0, Hitachi Data Protection Suite 10 (via Simpana Backint interface)
1957450
EMC
Networker 8.2, Interface for Data Domain Boost 1.0
1999166, 1970559
HP
Data Protector 7.0 and 8.1
1970558
IBM
Tivoli Storage Manager for Enterprise 6.4
1913500
SEP
Sesam 4.4
2024234
Symantec
NetBackup 7.5
1913568

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What’s New in SAP HANA SPS09: Backup and Recovery Backint: Improvements for backup tools that write to tape
SAP HANA’s internal recovery handling has been adapted in order to avoid deadlock situations when retrieving log backups from a 3rd party backup tool that uses tapes
In some cases 3rd party backup tools have encountered deadlocks when two SAP HANA database services requested log backups from the same tape (no concurrent access possible to the tape).

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What’s New in SAP HANA SPS09: Backup and Recovery Backint: Improvements for log backups
SAP HANA now uses a single backup call to the 3rd party agent for all log segments of a service that are ready for backup
In some scenarios the start of a 3rd party backup agent for a log backup may take longer than the actual log backup itself. During times of high load, this may lead to many pending log backups and in the worst case to “log full” situations (log segments are only released for overwrite after a successful log backup).
The new behavior is enabled by default. To disable it, set the following database configuration parameter to the value “1”: global.ini  backup  max_log_backup_group_size
The log segments that are part of such a multiple log backup are only released for overwrite in the SAP HANA log volume after the last of them has been backed up.
In the backup catalog, separate entries are maintained for such a multiple log backup. However, when you later want to remove log backups (backup lifecycle management), you can only remove all log backups of such a multiple log backup together, which requires that none of them is needed any more.

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What’s New in SAP HANA SPS09: Backup and Recovery Backint: Improvements for the backup of the backup catalog
SAP HANA now only writes one backup of the backup catalog for concurrent log backups of different services. This means that the backup of the backup catalog covers all log backups that were written since the last backup of the backup catalog.
In earlier versions, a backup of the backup catalog was written after each individual log backup of each service. Since there is only one backup catalog (service-independent), this could lead to a lot of pending backup requests for the backup catalog and thus block the release of log segments, e.g. in scale-out scenarios under heavy load.
The new behavior is enabled by default. To disable it, set the following database configuration parameter to “false”: global.ini  backup  enable_accumulated_catalog_backup

32. More Information

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What’s New in SAP HANA SPS09: Backup and Recovery Documentation
SAP HANA studio provides context-sensitive help for backup/recovery
To open the context-sensitive help, press F1, or choose Help -> Dynamic Help
Documentation update
The backup/recover chapter in the SAP HANA Admininistration Guide has been updated.

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What’s New in SAP HANA SPS09: Backup and Recovery More information
SAP HANA documentation
Available on the SAP Help Portal
SAP HANA Administration Guide, SAP HANA Technical Operations Manual
SAP HANA website
Backup/recovery overview presentation
Important SAP Notes
1642148: FAQ: SAP HANA database backup and recovery
1730932: Using backup tools with Backint
1869119: Check backup integrity
For further notes on backup/recovery, see HAN-DB-BAC
Backint for SAP HANA certification
Certification announcement and description

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Thank you
Contact information
Andrea Kristen
SAP HANA Product Management
AskSAPHANA@sap.com