CAPITULO III: ANÁLISIS DE LOS RESULTADOS
3.3. Validación encuesta mediante el coeficiente Alfa de Cronbach
Table 5-1describes the options that are available when you perform restores. These options appear in the Restore Microsoft SQL Server Objects dialog box after you select File > Restore SQL Server objects.
Table 5-1 Options for restore operations Description
Option
Restore with the SQL Server replace option.
Use replace option
These scripting options are available for restoring from a database image:
■ Restore selected object
Produce a script that performs a database restore. This script is the default option.
■ Create a move template
Create a script template for moving the selected database.
■ Restore read-only filegroups
Restore the most recent backup of every read-only filegroup.
■ Create a page restore template
Create a template for restoring a database, filegroup, or file from the pages that are contained in the selected backup image. The Microsoft SQL Server service must have full access permission to the folder install_path\netbackup\dbext\mssql\temp.
■ Verify backup image, but don't restore
This option is only available if the image was backed up with the page verification option.
NetBackup processes the image for errors, but does not perform a restore.
Scripting
72 Performing restores of SQL Server Options for NetBackup for SQL Server restores
Table 5-1 Options for restore operations (continued) Description
Option
Specify one of the SQL Server recovery options.
■ Not recovered
Use this option during a restore if additional backup images must be applied to the database following the current restore. When you use this option, the database is left in a loading state.
■ Recovered
Select this option when restoring the last image in a restore sequence. After the recovery operation, the database is ready for use. If you do not select this option, the database is in an intermediate state, and is not usable. If Recovered is selected when an intermediate backup is applied, you cannot continue to restore backups; you must restart the restore operation from the beginning.
■ Standby
Create and maintain a standby during a transaction log and database restore. This option requires a standby undo log, which by default is placed in
install_path\NetBackup\logs\SQLStandBy\. The account that runs the Microsoft SQL Server service must have full access permission to the SQLStandBy folder. The database is placed in "standby" state following the restore.
Recovery
Select the consistency check to be performed after the restore. Output from the consistency check is written to the SQL Server client progress log. You cannot select consistency checking unless the database is restored to the recovered state. If you select consistency checking for a staged recovery, then the check occurs following the last restore.
■ None
Do not perform consistency checking.
■ Full check, excluding indexes
Exclude indexes from the consistency check. If indexes are not checked, the consistency check runs significantly faster but is not as thorough. Only the data pages and clustered index pages for each user table are included in the consistency check. The consistency of the non-clustered index pages is not checked.
■ Physical check only
Select this item to perform a low overhead check of the physical consistency of the SQL Server database. This option only checks the integrity of the physical structure of the page and record headers. It also checks the consistency between the pages’ object ID and index ID and the allocation structures.
■ Full check, including indexes
Include indexes in the consistency check. Any errors are logged.
■ Check catalog
Check for consistency in and between system tables in the specified database.
Consistency Check
73 Performing restores of SQL Server Options for NetBackup for SQL Server restores
Table 5-1 Options for restore operations (continued) Description
Option
Note:A performance penalty can happen when you use page verification.
These options are available if the source object was backed up with torn page detection or checksum verification.
■ Do not perform verification
Do not include page verification in the restore script.
■ Perform verification
Include page verification in the restore script and stop the restore if an error is encountered.
Page verification
Select this option to recover the database by using the recovery set that NetBackup found.
If the transaction log that you select does not belong to a recovery set, this option is disabled.
Stage full recovery
Select this option to restore only the selected transaction log. If the transaction log that you select does not belong to a recovery set, this option is disabled.
Restore selected transaction log
This list contains the controls for you to restore a transaction log. You can restore the log to a point in time that precedes the time when the transaction log was dumped. The individual entries in this group are only enabled if you selected a transaction log backup.
■ To point in time
Select this option to have the transaction log recovered to a point in time.
■ To transaction log mark
Select this option to have the transaction log recovered to a transaction log mark. With this option, you must enter a transaction log mark name.
■ To transaction log mark but after
Select this option to have the transaction log recovered to a transaction log mark but after a point in time. With this option, you must enter a transaction log mark name.
■ Before transaction log mark
Select this option to have the transaction log recovered to a point before the occurrence of a transaction log mark. With this option, you must enter a transaction log mark name.
■ Before transaction log mark but after
Select this option recover the transaction log to a point before the occurrence of a transaction log mark but after a point in time. With this option, you must enter a transaction log mark name.
Transaction log recovery options
Specify the time to which you want the transaction logs restored. These fields are only enabled if you selected one of the following transaction log recovery options:
■ To point in time
■ To transaction log mark but after
■ Before transaction log mark but after MM, YYYY, DD, HH,
MM, SS am, pm
74 Performing restores of SQL Server Options for NetBackup for SQL Server restores
Table 5-1 Options for restore operations (continued) Description
Option
This list is enabled if you selected a database transaction log for restore. The transaction log contains one or more transaction log marks, and you selected one of the following transaction log recovery options:
■ To transaction log mark
■ To transaction log mark but after
■ Before transaction log mark
■ Before transaction log mark but after Transaction log mark
Start the restore operation immediately.
Launch immediately is disabled if you are logged into a SQL Server instance that is not on the local host. If you generate a script for a non-local host, it must be executed on that host.
Launch immediately
Restore script
Generate a script that can be started at a later time.
Save
Start the restore or generate a restore script. This button is disabled if you have not selected any objects to restore.
Restore