CHAPTER 16
Backing Up Data to Disk with Appliance
Backup Utility
The Appliance Backup Utility feature provides a simple way to back up Teradata Database to a disk file system, then restore the backup datasets from the disk file system to the same Teradata
Database. You can also use the Appliance Backup Utility to copy Teradata Database object data of one instance of a Teradata Database to another instance of a Teradata Database. You must have the Appliance Backup Utility installed on each Teradata Database node when copying data to another instance.
System Configuration
Data is backed up to IP SAN (iSCSI) or NAS (NFS) disk storage, which is required, but
Teradata Corporation does not provide. You are responsible for providing, configuring, and maintaining the disk storage.
Figure 81: System Diagram
Teradata Node 1
Appliance Backup Utility
Using
ARC CLIv2 PIOM
TDICU and Tera-GSS
Third-Party Server
GB Ethernet
IP SAN or NAS
Disk
Storage
Third-Party Backup Application
Client and Media Server
Teradata Node 2
Appliance Backup Utility
Using
ARC CLIv2 PIOM
TDICU and Tera-GSS
Tape
Storage
VTL or
Disk
Storage
3134A001
For complete data protection, copy data from the IP SAN or NAS disk storage to tape through any third-party backup application such as NetBackup, IBM Tivoli, EMC NetWorker, and
CommVault. Backing up then becomes a two-step process: backing up to IP SAN or NAS disk storage, then copying to tape storage, disk, or Virtual Tape Library (VTL) with a third-party application. To restore, use the original file names to copy the data back to the IP SAN or NAS disk storage, then restore to Teradata Database.
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Features
Features
Note: You are responsible for providing, configuring, and maintaining the third-party application and should be proficient in managing your data protection environment. Teradata
Corporation support is limited to Appliance Backup Utility functionality on the node.
Using the Appliance Backup Utility GUI, you can:
•
Back up all DBC data with the Backup All option
•
Restore the latest DBC backup with the Restore Latest option
•
Back up selected database objects such as triggers, macros, or tables with the Backup
Selected Objects option
•
Restore selected database objects with the Restore Selected Objects option
See the Appliance Backup Utility Installation and User Guide, B035-3134 for information on using the Appliance Backup Utility GUI.
Components
The Appliance Backup Utility software components are the Appliance Backup Utility server, client, and GUI.
Appliance Backup Utility Server
The Appliance Backup Utility server is a Teradata Database node that:
•
Has Appliance Backup Utility server, client, and GUI software
•
Is connected to the IP SAN or NAS disk storage
•
Is the node on which you run the configuration script
The Teradata Database node that is designated as the Appliance Backup Utility server also functions as the GUI and an Appliance Backup Utility client. There must always be an active
Application Backup Utility client on the Teradata Database node that is selected to run the
Application Backup Utility server.
Appliance Backup Utility Client
An Appliance Backup Utility client is a Teradata Database node that you have specified as a client and has:
•
Active Appliance Backup Utility client software
•
A connection to the IP SAN or NAS disk storage
•
Passive Appliance Backup Utility server software, which is not used unless the server is manually switched in failover recovery
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About Appliance Backup Utility Operation
Appliance Backup Utility GUI
The Appliance Backup Utility GUI allows you to control the backup and restore operations of the Appliance Backup Utility. You can install the GUI on any node or PC workstation that is connected to the Appliance Backup Utility server.
About Appliance Backup Utility Operation
The Teradata Database node that is designated as the Appliance Backup Utility server controls backup and restore operations, working as a master to Appliance Backup Utility clients that manage the data streams during backup and restore operations.
A Backup All job is configured to run multiple data streams, which are equal to the number of
Appliance Backup Utility clients configured to the Appliance Backup Utility. For every job data stream, a backup file is created on the storage device. There might be multiple disk partitions or directories designated as destination paths for the backup stream. The sum of all backup files created by the data streams equals the entire backup of your Teradata Database. If one or more of these files are deleted or corrupted, you will not be able to restore your
Teradata Database backup.
You can configure a Backup Selected Objects job to run one or more data streams. Configure one stream only if you know the length of time the backup will take and if the objects or group of objects are small. Optimal backup throughput is only achieved with full parallelism where all Appliance Backup Utility clients are used.
Teradata Node Connection to Secondary
Storage Device
The Appliance Backup Utility takes advantage of Teradata node parallelism to back up and restore Teradata Database, resulting in high performance. Appliance Backup Utility backup and restore throughput also scales with the size of the system.
To achieve maximum parallelism, connect each Teradata Database node to a backup target disk device. This allows the node to send all data on its primary disk to the device through the
Gbit network connection on the node. If there is no direct connection from a node to the secondary storage device, an Appliance Backup Utility client cannot be configured for that node. The data local to that node is redirected through the Teradata BYNET to other nodes that are configured as Appliance Backup Utility clients. The backup and restore operation will complete, but the throughput will be severely degraded.
To achieve maximum network performance, ensure that the network connection is in a private LAN.
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Secondary Storage Device
Secondary Storage Device
Teradata Database backup and restore throughput is affected by several factors. One of the most important factors is the storage device you choose to connect to the Teradata Database node. The Appliance Backup Utility supports the use of IP SAN (iSCSI) or NAS (NFS) as a secondary storage device, but Teradata Corporation does not sell or recommend a specific brand. However, consider the following criteria when choosing the storage device:
•
Total size of the storage space
•
Type, quantity, and size of the disk drives in the array
•
Storage device performance rating
•
Type of network connection (1Gbit or 10Gbit)
•
Number of network connections to the device
•
Concurrency and parallelism aspects of the device
•
Disk partitioning
•
Other device specifications that contribute to the read and write performance of the storage device
Network Switch
A Gbit network switch might be necessary to connect every Teradata Database node to the IP
SAN or NAS storage device. Teradata Corporation does not provide this device. It is your responsibility to provide and configure this device.
Installation and Configuration
See the Appliance Backup Utility Installation and User Guide, B035-3134 for information on installing and configuring Appliance Backup Utility.
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