Administering Arcserve Backup › Protecting Data Using Arcserve Backup › How Arcserve Backup Processes Backup Data Using Multistreaming › Multistreaming Support for Local Backup Jobs

Multistreaming Support for Local Backup Jobs

The following considerations apply to multistreaming support for local backup jobs:

• If a local backup does not contain any VSS writers, the job can be a multistreaming job.
• If a local backup contains VSS writers, and both the following global options are unchecked, then the job can be a multistreaming job:
  • Writers and Components/Files included by Writer will be excluded from file system backups.
  • Writers and Components/Files excluded by Writer will be excluded from file system backups.
• If a local backup contains VSS writers, and any of the following global options are checked, then the job cannot be a multistreaming job:
  • Writers and Components/Files included by Writer will be excluded from file system backups.
  • Writers and Components/Files excluded by Writer will be excluded from file system backups, and following message is displayed in the activity log: The local node contains VSS writers, disk level multistreaming will be disabled.

    To enable multistreaming for local VSS backup, uncheck default global options for "Writers and Components".

• If a local backup contains VSS writers, and the registry key HKEY_LOCAL_MACHINE\SOFTWARE\ComputerAssociates\CA ARCserve Backup\Base\Task\Backup\ForciblyMUSForLocalVSSBackup is set to 1, the global options for "Writers and Components" is ignored. The job can be a multistreaming job.