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Veeam Backup & Replication 9.5
User Guide for VMware vSphere

Tape Parallel Processing

If your tape library has multiple drives, you can use drives simultaneously for writing data to tape. This option is useful if you have a lot of tape jobs running at the same time or you have a lot of data that must be written to tape in a limited backup window.

To enable the tape parallel processing, configure options of media pool. In the media pool setting, set a maximum number of drives that can be used for simultaneous data processing. For details, see Step 6. Add Optional Media Pool Settings.

For parallel processing, you can utilize multiple drives of one tape device.

Tape Parallel Processing Note:

You cannot enable parallel processing for GFS media pools.

To process the tape data parallelly, you can split the data across drives in 2 ways:

Processing Tape Jobs Simultaneously

When you process tape jobs parallelly, the media pool assigns a drive to each running tape job. For example, if you set 3 drives as the maximum, you can process up to 3 tape jobs at the same time. If you have more jobs running at the same time, they are queued. When one of the jobs finishes and releases its drive, the first queued job takes the drive.

This option is available for backup to tape and file to tape jobs.

For example:

The tape jobs start, and jobs A, B and C occupy 3 drives to write data to tape. The Tape job D is queued and waits. When one of the jobs finishes and releases its drive, the Tape job D takes the drive and starts writing data.

Tape Parallel Processing 

Processing Backup Chains Simultaneously

When you select processing backup chains paralelly, the media pool processes several primary jobs simultaneously. If the primary jobs produce per-VM backups, the media pool processes several per-VM backup chains simultaneously. For more information about per-VM backup files, see Per-VM Backup Files

This option is available for backup to tape jobs only.

For example:

  • You set the maximum number of drives to 3.
  • Tape job A has 4 primary jobs.

Tape job A starts, and occupies 3 drives to process 3 primary jobs. The fourth primary job is queued and waits. When one of the drives is released, the fourth primary job takes the drive and starts writing data.

If another tape job starts, it will be queued and wait until Tape job A finishes.

Tape Parallel Processing 

If a tape job has only 1 primary job, it is processed as 1 source.

For example:

  • You set the maximum number of drives to 3.
  • Tape job A has 1 primary job; Tape job B has 3 primary jobs. Both tape jobs start at the same time.

Tape job A occupies Drive 1. Tape job B occupies 2 other available drives and processes 2 primary jobs. Tape job A finishes and releases Drive 1, the third primary job from the Tape job B occupies Drive 1.

Tape Parallel Processing 

Related Topics

Media Sets Created with Parallel Processing

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