Veritas NetBackup™ AdvancedDisk Storage Solutions Guide

Last Published:
Product(s): NetBackup (8.2, 8.1.1, 8.1)
  1. Introducing AdvancedDisk
    1.  
      About the AdvancedDisk storage option
  2. Licensing AdvancedDisk
    1.  
      About the AdvancedDisk license
    2.  
      Licensing AdvancedDisk
  3. Configuring AdvancedDisk
    1.  
      Configuring the AdvancedDisk option
    2.  
      About AdvancedDisk file system requirements
    3.  
      Configuring credentials for CIFS storage and disk storage units
    4.  
      About AdvancedDisk storage servers
    5.  
      About AdvancedDisk data movers
    6.  
      About AdvancedDisk preferred or required read servers
    7.  
      About data encryption for AdvancedDisk storage
    8.  
      About key management for encryption of NetBackup AdvancedDisk storage
    9. Configuring key management for NetBackup AdvancedDisk storage encryption
      1.  
        Setting up the KMS database for NetBackup AdvancedDisk storage encryption
      2.  
        Creating a KMS key group for NetBackup AdvancedDisk storage encryption
      3.  
        Creating a KMS key for NetBackup AdvancedDisk storage encryption
      4.  
        Saving a record of the KMS key names for NetBackup AdvancedDisk storage encryption
    10. Configuring an AdvancedDisk storage server
      1.  
        AdvancedDisk storage server configuration options
    11.  
      About AdvancedDisk disk pools
    12.  
      Configuring a CIFS disk volume for AdvancedDisk encryption
    13. Configuring an AdvancedDisk disk pool
      1.  
        NetBackup nbdevconfig command options for AdvancedDisk disk pools
      2.  
        AdvancedDisk disk pool properties
    14. Configuring an AdvancedDisk storage unit
      1.  
        AdvancedDisk storage unit properties
      2. About AdvancedDisk storage unit recommendations
        1.  
          About configuring a favorable client-to-server ratio
        2.  
          About throttling traffic to the media servers
    15.  
      About storage lifecycle policies
    16. Creating a storage lifecycle policy
      1.  
        Storage Lifecycle Policy dialog box settings
    17.  
      Creating a backup policy
    18.  
      Resilient Network properties
    19.  
      Specifying resilient connections
  4. Managing AdvancedDisk
    1. Managing AdvancedDisk storage servers
      1.  
        Viewing AdvancedDisk storage servers
      2.  
        Determining AdvancedDisk storage server state
      3.  
        Viewing AdvancedDisk storage server attributes
      4.  
        Removing AdvancedDisk storage server attributes
      5.  
        Removing an AdvancedDisk storage server from disk pool access
      6.  
        Deleting an AdvancedDisk storage server
    2. Managing AdvancedDisk disk pools
      1.  
        Viewing AdvancedDisk disk pools
      2.  
        About changing the AdvancedDisk disk pool size
      3.  
        Adding volumes to an AdvancedDisk disk pool
      4.  
        Changing AdvancedDisk disk pool properties
      5.  
        Determining AdvancedDisk disk pool state
      6.  
        Changing AdvancedDisk disk pool state
      7.  
        Determining AdvancedDisk disk volume state
      8.  
        Changing AdvancedDisk disk volume state
      9.  
        Merging AdvancedDisk disk pools
      10.  
        Removing a volume from an AdvancedDisk disk pool
      11.  
        Inventorying a NetBackup disk pool
      12.  
        Deleting an AdvancedDisk disk pool
    3.  
      About monitoring AdvancedDisk storage capacity and usage
    4.  
      Monitoring NetBackup disk activity
    5.  
      Viewing AdvancedDisk disk reports
    6. Displaying detailed AdvancedDisk storage usage information
      1.  
        NetBackup disk volume capacity and usage reference
    7.  
      Displaying KMS key information for AdvancedDisk encryption
  5. Toubleshooting AdvancedDisk
    1. About unified logging
      1.  
        About using the vxlogview command to view unified logs
      2.  
        Examples of using vxlogview to view unified logs
    2. About legacy logging
      1.  
        Creating NetBackup log file directories for AdvancedDisk
    3.  
      NetBackup AdvancedDisk log files
    4.  
      AdvancedDisk troubleshooting
    5.  
      Resolving an incorrect storage type problem

NetBackup disk volume capacity and usage reference

NetBackup determines the space available for backups on a volume by using the following formula:

Available space equals free_space plus potential_free_space minus committed_space.

The potential_free_space value is used only for a disk volume that is capacity managed. A disk volume is capacity managed when its disk pool is capacity managed. A disk pool is capacity managed when it is a destination in a storage lifecycle policy and the Retention Type is Capacity managed.

Table: Disk capacity values describes the capacity values that NetBackup uses for space calculations.

Table: Disk capacity values

Field

Description

total_capacity

The total size of the disk.

This value is derived from the file system and is updated at 1-minute intervals.

total_phys_capacity

For the purposes of AdvancedDisk, total_capacity and total_phys_capacity should have the same values.

free_space

The amount of free space on the disk.

This value is derived from the file system and is updated at 1-minute intervals.

free_phys_space

For the purposes of AdvancedDisk, free_space and free_phys_space should have the same values.

potential_free_space

The sum of all of the fragments on the disk that NetBackup duplicated as part of a storage lifecycle policy and that are eligible for expiration. A fragment becomes eligible for expiration when it has been duplicated successfully.

NetBackup calculates potential_free_space a the end of duplication sessions and expiration sessions.

The potential_free_space value may become stale between computations. However, the next computation provides an accurate value.

committed_space

The estimated size of all of the jobs-in-progress that write to the volume, based on the following:

  • For an existing backup, NetBackup uses the size of the most recent backup plus 20%.

  • For a new backup (including user backups), NetBackup uses the capacity of the disk volume over the high-water mark. For example, on a 2-TB volume that has a 98% high-water mark, NetBackup uses 40 GBs.

  • For duplication jobs, NetBackup uses the size of the source image.

precommitted_space

The precommitted_space is a helper value for committed_space. NetBackup decrements the value while a backup job runs. Each time NetBackup updates the capacity and free space information, NetBackup updates the value of committed_space to the current value of precommitted_space.

This process ensures that all capacity-related values are updated at the same time to provide the most accurate usage description for the disk volume.