Determine the number of backup servers in the environment

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The number of required IBM® Storage Protect Snapshot backup servers is determined by the number of servers that are used to access backup images.

To access backup images on either site of a disaster recovery environment, at least two backup servers are needed. A backup server can also simultaneously be used for multiple applications and multiple production servers. IBM Storage Protect Snapshot can mount a backup image on a backup server. For the following scenarios, at least one backup server is required.
  • Mount backup images on another server.

  • When IBM Storage Protect Snapshot is used with IBM Storage Protect backup-archive client to offload snapshot backups to an IBM Storage Protect server

  • When IBM Storage Protect Snapshot requires a mount operation, during a backup operation because the following conditions exist:
    • The database is running in an LVM mirrored environment on AIX.®
    • Conditions that require a so called IBM Storage Protect Snapshot forced mount operation for the different storage subsystem environments:
      SAN Volume Controller, Storwize® family, and DS8000®
      A forced mount is required if the option PREASSIGNED_VOLUMES is set for the profile parameter BACKUP_HOST_NAME and the operating system is Linux™.
      DS8000
      A forced mount is required on AIX if the option PREASSIGNED_VOLUMES is set for the profile parameter BACKUP_HOST_NAME and a freeze and thaw action was not executed for the file systems.