Backup and Restore 2 Manual
Backup and Restore 2 Overview
Backup and Restore 2 Manual—522696-019
1-2
Data Management Application (DMA)
Interfaces to the disk subsystem
Communicates with the DMA for backup jobs
Communicates information to the DMA about the files backed up or restored
Receives data from the Tape Service for restore jobs
Passes file image date to the Tape Service during backup
Enumerates objects during backup
Issues error messages
The Data Service object files BR2ODS, which supports only the OSS file system and
BR2Ds, which supports both OSS and SQL/MX file systems are located at
$SYSTEM.SYSnn.
Data Management Application (DMA)
The DMA has several functions:
Controls each job session
Creates the service processes and starts the Tape Service and the Data Service
Creates the BRIC file in $workvolume.jobid.BRIC during backup
Issues error messages
Updates job records
Maintains information about each job in the BRJOBS file to keep track of the
progress of the job
Reads the BRIC file during a restore job
Controls the writing and reading of object data to and from disks and tapes through
the Data Service and Tape Service
Enables parallel backup of OSS and/or SQL/MX objects on two tape devices
simultaneously
Enables manual restart of a failed backup or restore operation
The Data Management Application object files BR2ODMA, which supports only the
OSS file system and BR2DMA, which supports both OSS and SQL/MX file systems
are located at $SYSTEM.SYSnn.
Tape Service
The Tape Service is a service process that is controlled by the DMA. It provides the
interface between Backup and Restore 2 components and the tape subsystem. The
Tape Service:
Communicates with the DMA
Receives data from the Data Service for backup jobs
Passes data to the Data Service for restore jobs
Interfaces to the labeled tape subsystem
Reads, writes, and positions tapes
Issues error messages
Note. The parallel backup and manual restart features are supported only on systems running
H06.05 or later H-series RVUs.