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LiteSpeed for SQL Server 8.5 - Engine User Guide

Configure Application Options

To configure LiteSpeed Engine options

  1. Select Tools | Options.
  2. Set application options. Review the following for additional information:

    Option Description
    New extension defaults Default compression and encryption levels used when creating new file extension entries.
    Available extensions

    The file extensions in this list will be visible in the extension drop-down list in the Add Configuration Option window.

    NOTE: New file extensions may be added dynamically when adding custom extensions using the Edit | Add Extension option.

    Application

    You can edit the following application behaviors in the Application section:

    • Ask to save on exit (enabled by default)—When this option is enabled, if you have added or edited file extension settings you will be prompted to save the configuration upon exiting the application.
    • Update driver on save (enabled by default)—When this option is enabled, if you have added or edited file extension settings the driver will be updated when the configuration is saved.
    • Reset form layout—This option will reset the application form window, along with the column order and size, to their defaults. When this option is employed, it clears any changes you may have made to the application form and its columns immediately after you click Ok.

Troubleshooting

Review the following to help you troubleshoot different problems:

Can’t backup a file

  • If you are creating an encrypted appended backup file, LiteSpeed Engine needs the backup file’s restore password when performing a backup. SQL Server needs to re-read a portion of the previous backup before appending the new backup, making it necessary for LiteSpeed Engine to decrypt this information. To save the restore password to the LiteSpeed Engine configuration, edit the file extension setting using the LiteSpeed Engine Configuration editor.
  • LiteSpeed Engine only supports the use of encryption with appended backups if the user includes the restore password in the configuration file.
  • LiteSpeed Engine does not support the changing of passwords for an appended backup file.
  • LiteSpeed Engine does not support the back up of encrypted and unencrypted backups in the same file.

Can’t restore a file

Ensure that the driver is installed and running. To verify the installation and version information, select File | Driver management | Driver status... or enter to following command at the command prompt:

c:\>  sc qdescription lsbackfilter
  • If you are using encryption, ensure that you have the correct encryption password or that the password has not been changed. LiteSpeed Engine does not maintain password history. You will need to either reconfigure the associated backup extension with the correct password. Alternately, rename the backup using a new extension which is then assigned the correct restore password.
  • LiteSpeed Engine does not support the changing of passwords for an appended backup file.
  • Ensure that the directory where the backup file resides has the appropriate read/write access. If the .lsi file associated with the backup is unavailable, LiteSpeed Engine will attempt to rebuild it.

Backups are no longer compressed

  • Ensure that you have a valid license. Select the Help | License.
  • Ensure that your license has not expired. If the license has expired the Windows Event Log will contain an LiteSpeed Engine entry indicating that the license has expired. You can quickly retrieve LiteSpeed Engine related Event Log entries by selecting Help | Support Bundle and clicking View log.
  • Ensure the driver was updated to pick up the changes you made to the configuration file. Select File | Driver management | Refresh driver configuration.
  • Ensure the disk you want to backup to is available.  When a cluster drive failed over or a usb drive was added, you can manually rescan the disk devices to be able to do compressed backups to these drives. Select File | Driver management | Rescan for new drives.

Backup performance seems slow

  • Because LiteSpeed Engine CPU usage is higher at compression level 2 and higher, you may be CPU bound. LiteSpeed Engine takes advantage of more CPUs when backups are striped. If your backup targets to a single file, try striping the backup file to two or more files.

Use Driver Tracing

Use Driver Tracing

The driver tracing feature is a troubleshooting tool that is generally used by Quest Software Support to gather and send information to the software development team. If you are instructed by Quest Software Support to enable driver tracing the following will help you to configure tracing, as well as view the trace file.

To enable driver tracing

  1. Select File | Driver management | Configure tracing.
  2. Select the Tracing Enabled checkbox and complete the dialog.

Similarly, to disable tracing, clear the Tracing Enabled checkbox.

To view the driver trace log

Use the File | Driver management | View driver tracing option.

Create Support Bundles

A Support Bundle is a collection of system information. Quest Software Technical Support may ask you to generate a Support Bundle and send it to them to help troubleshoot product issues.

To create a support bundle

Select Help | Support Bundle.

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