Veritas NetBackup™ Flex Scale Administrator's Guide
- Product overview
- Viewing information about the NetBackup Flex Scale cluster environment
- NetBackup Flex Scale infrastructure management
- User management
- About Universal Shares
- Node and disk management
- License management
- User management
- NetBackup Flex Scale network management
- Bonding operations
- Data network configurations
- NetBackup Flex Scale infrastructure monitoring
- Resiliency in NetBackup Flex Scale
- EMS server configuration
- Site-based disaster recovery in NetBackup Flex Scale
- Performing disaster recovery using RESTful APIs
- NetBackup Flex Scale security
- Troubleshooting
- Collecting logs for cluster nodes
- Troubleshooting NetBackup Flex Scale issues
- Appendix A. Configuring NetBackup optimized duplication
- Appendix B. Disaster recovery terminologies
- Appendix C. Configuring Auto Image Replication
VVR technology in disaster recovery
In NetBackup Flex Scale, the NetBackup catalog is replicated using Veritas Volume Replicator (VVR). VVR is a block level replication software. A consistency group of volumes is created on the source location and remote location. In VVR terminology, consistency group is known as Replicated Volume Group (RVG). VVR replicates data from a primary RVG on the primary site to the secondary RVG on the secondary site. VVR maintains write-order fidelity to guarantee consistent and recoverable copy of data on secondary site.
RVG consists of following components:
RLINK: Establishes the replication link between primary and secondary RVG.
SRL: Storage Replicator Log is a circular buffer of all the writes for an RVG. SRL enables VVR to maintain write-order fidelity at the secondary site.
Data Volumes: Group of related volumes.
DCM: Data Change Map is a component of VVR which is used to track application writes when the SRL overflows. This enables VVR to avoid complete resynchronization of the data on the secondary. DCM is only active on the primary site.