Backup and Restore 2 Manual

Backup and Restore 2 Overview
Backup and Restore 2 Manual—522696-019
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Backup and Restore Intermediate Catalog (BRIC)
File
Backup and Restore Intermediate Catalog (BRIC) File
The BRIC file contains information for a single backup job. It contains disk file catalog
information, including the list of files backed up on tape and their location. The BRIC is
a temporary disk file and a permanent tape file until the tape file expires. The DMA
normally purges the BRIC disk file at the end of the backup job.
The BRIC file is written to tape as a job directory at the end of the backup job. The
BRIC file can span the last two tapes but is usually located on the last tape of the job.
For a parallel backup operation, the same BRIC file is written on both the tapes. You
can restore the BRIC file from tape to disk during the restore of objects.
The number of files being processed and their size determines the amount of disk
activity on the BRIC file. Large files result in relatively low disk activity. A large number
of small files results in relatively high disk activity. The DMA creates the BRIC file for
each job in the $workvolume.jobid subvolume.
Supported Objects
Backup and Restore 2 interacts with OSS and SQL/MX to backup or restore OSS or
SQL/MX objects. For OSS, you can use either the pax utility and Backup and Restore
(T9074) or Backup and Restore 2. To back up or restore SQL/MX objects, Backup and
Restore 2 is required.
Open System Services (OSS)
The OSS environment provides a user and programming interface similar to that of the
UNIX operating system. The OSS environment combines the benefits of the UNIX
operating system with the features of the NonStop operating system. OSS differs from
the UNIX operating system in that almost all management and operation activities are
performed through Guardian commands.
The OSS file system consists of one or more OSS filesets. Each OSS fileset is a
hierarchy of files: a set of directories, subdirectories, and files themselves. An OSS
fileset can have other OSS filesets mounted on directories in it. In fact, the collection of
directories and files under the root directory is part of one OSS fileset. Every file
belongs to an OSS fileset.
For more information about OSS, see the Open System Services Management and
Operations Guide.
In G06.29 and later G-series RVUs and H06.06 and later H-series RVUs, Backup and
Restore 2 lets you back up and restore all OSS files (regular OSS files, that are smaller
than 2 GB and larger OSS files that are greater than or equal to 2 GB) without any loss
of functionality. The only exceptions are restore jobs where the destination filesets do
not support files greater than 2 GB. For example, if you have a tapefile with a mix of
Note. The parallel backup feature is supported only on systems running H06.05 or later
H-series RVUs.