The SAS
9.3 Metadata Server includes a new server-based facility that performs
metadata server backups automatically, on a scheduled basis, without
the need for administrator intervention. This facility can also be
used to perform ad hoc backups and to perform roll-forward recovery.
The facility replaces the %OMABAKUP macro, which was available in
SAS 9.1 and 9.2, and the Backup and Restore Wizard in SAS Management
Console, which was available in SAS 9.2.
The backup facility
backs up all registered metadata repositories, the repository manager,
and the metadata server’s configuration directory. By default,
backups are scheduled to run at 1:00 a.m. daily. Administrators can
change this schedule as needed. Backups can also be launched from
SAS Management Console, from the operating system command line, from
SAS, or through third-party scheduling software.
The metadata server
backup facility provides the following advantages:
-
The backup facility executes in
a separate thread while the metadata server is running. Therefore,
the server does not need to be paused during backups unless certain
options are selected. When repositories are restored in the event
of a metadata server failure, transactions recorded in the journal
file can be used to perform roll-forward recovery to a specified point
in time after the last backup was taken.
-
The metadata server runs its own
backup and recovery processes and does not rely on any other servers.
Because the metadata server has permission to access all of the needed
files, there is no need to set up a host account with special operating
system rights and permissions.
-
The backup facility automatically
includes all of the metadata server’s data sets, including
the repository manager, all of your registered metadata repositories,
and the individual files that are stored in the metadata server configuration
directory (
SAS-configuration-directory/Lev1/SASMeta/MetadataServer).
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SAS Management Console displays
a detailed history of backups that were performed using the backup
facility. Status icons indicate which backups are active and which
backups have been deleted based on the retention policy. When you
view the properties of a backup, the backup files are validated, and
the status icon is updated to indicate whether the backup is usable.
-
When repositories are restored
in the event of a metadata server failure, transactions recorded
in the journal file can be used to perform roll-forward recovery to
a specified point in time after the last backup was taken.