Veritas NetBackup™ in Highly Available Environments Administrator's Guide

Last Published:
Product(s): NetBackup (8.2)
Platform: Linux,UNIX,Windows
  1. NetBackup protection against single points of failure
    1. About protecting against component failures
      1.  
        About protecting against network link failures
      2. About protecting against storage device connection failures
        1.  
          About protecting against SAN connection failures
        2.  
          About protecting against robotic control connection failures
      3.  
        About protecting against storage device failure
      4.  
        About protecting against media availability failures
      5.  
        About protecting against master server failures
      6. About protecting against media server failures
        1.  
          About protecting against dedicated media server failures
        2.  
          About protecting against non-dedicated media servers failures
        3.  
          About protecting against SAN media server failures
        4.  
          Restoring tape backups using an alternative media server
        5.  
          Restoring disk backups using an alternative media server.
      7.  
        About protecting against LAN client failures
      8.  
        About protecting against SAN client failures
    2.  
      About protecting against site failures
    3.  
      About protecting catalog in highly available environments
  2. About site disaster recovery with catalog backup and recovery
    1.  
      Disaster recovery packages
    2. About catalog recovery
      1.  
        About full catalog recovery
      2.  
        Performing full catalog restore
      3.  
        Making the DR environment consistent after a full catalog restore
      4.  
        About partial catalog recovery
      5.  
        Performing partial catalog restore
      6.  
        Making the DR environment consistent after a partial catalog restore
    3. About disk recovery in DR domain
      1.  
        Disk recovery in single-domain replication DR environment
      2.  
        Auto Image Replication
      3.  
        Disk recovery in cross-domain replication DR environment
  3. About site loss protection with auto image and catalog replication
    1.  
      About Auto Image Replication (AIR)
    2. About NetBackup catalog replication
      1.  
        About conditions for support of replicated NetBackup catalogs
      2.  
        About catalog synchronization
      3. About multi-site single domain replication
        1.  
          About multi-site single domain with stretched SAN
        2.  
          About multi-site single domain with optimized duplication
      4. About multi-site cross domain replication
        1.  
          About multi-site cross domain and BasicDisk storage
        2.  
          Planning a cross domain replication disaster recovery domain
      5. About full catalog replication
        1.  
          Recovering the catalog with full catalog replication
        2.  
          Making the DR environment consistent with full catalog replication
      6. About partial catalog replication
        1.  
          Preparing an environment for partial catalog replication
        2.  
          Recovering the environment with partial catalog replication
        3.  
          Making the disaster recovery environment consistent with partial catalog replication
        4.  
          Considerations for managing tapes with partial catalog replication
  4. Deploying NetBackup master servers with full catalog replication
    1.  
      About replication considerations
  5. Using NetBackup to perform backups and restores in a cluster
    1. About backups and restores with NetBackup in a cluster
      1.  
        Performing user-directed backups with NetBackup in a cluster
      2. About restoring data in a cluster
        1.  
          Example: Performing a user-directed restore in a NetBackup cluster
    2. About supported NetBackup application agents in a cluster
      1.  
        About backing up database files in a cluster
      2.  
        About user backups
      3.  
        About NetBackup client in a cluster

About replication considerations

To deploy NetBackup with catalog replication, you must consider the following factors for planning the actual deployment.

Table: Replication considerations

Considerations

Description

Master server considerations

Veritas does not recommend operating a master server as a combined master and media server. If the storage devices available at the different sites are not compatible, it can lead to problems with storage unit definitions and backup failures.

Catalog replication is not a substitute for catalog backup and the catalog must be backed up on a regular basis.

Networking considerations

In a multi-site single domain configuration, the master server controls the media servers on both the sites. The metadata must pass between the sites. This metadata traffic is sent over a standard I/P link between the sites. The same link can be used as the heartbeat link for the global cluster control. Veritas recommends that a link of at least 10 Mb/sec and ideally 100 Mb/sec must be provided between the sites to handle this traffic.

If host-based replication is used, additional I/P bandwidth is required for the replication layer. The additional bandwidth must also be factored in.

DNS considerations

If the master server nodes at the secondary site are on a different subnet from the master server nodes at the primary site, a DNS change is required as part of the failover process. You can initiate the DNS change automatically by using the cluster failover process. You can also initiate the process manually. The backup system does not function correctly until the change is fully propagated, which can affect the recovery time in a site failover.

Note:

To propagate the DNS change automatically by the cluster service group, the DNS resource must come on-line after starting NetBackup.

Primary and secondary master servers considerations

In order to perform a failover when using catalog replication the primary and secondary master servers must use the same topology.

The primary and secondary site master server nodes must both be either clustered or non-clustered.

Note:

The clustered master servers do not require the same number of nodes at each site.

For additional details refer http://www.veritas.com/docs/000090837.