When a backup server is needed
Backup servers are auxiliary hosts where IBM® Storage Protect Snapshot can mount backups. The number of required IBM Storage Protect Snapshot backup servers is determined by the number of servers that are used to access backup images.
For example, 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 other products for example, IBM Storage Protect for Enterprise Resource Planning to offload backups to an IBM Storage Protect server.
- When IBM Storage Protect
Snapshot requires a mount
during a backup operation because one of the following conditions
exists:
- 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.
A clone server is a single server, that can also be used as a backup server. A clone server is required when you use the cloning functionality of IBM Storage Protect Snapshot.