NetBackup for HBase terminologies — NetBackup 11.1 | Cohesity Documentation

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NetBackup for HBase terminologies — NetBackup 11.1 | Cohesity Documentation

NetBackup for HBase terminologies

The following table defines the terms you will come across when using NetBackup for protecting HBase cluster.

Table: NetBackup terminologies

Terminology	Definition
Compound job	A backup job for HBase data is a compound job. The backup job runs a discovery job for getting information of the data to be backed up. Child jobs are created for each backup host that performs the actual data transfer. After the backup is complete, the job cleans up the snapshots on the HMaster and is then marked complete.
Discovery job	When a backup job is executed, first a discovery job is created. The discovery job communicates with the HMaster and gathers information of the block that needs to be backed up and the associated Region servers. At the end of the discovery, the job populates a workload discovery file that NetBackup then uses to distribute the workload amongst the backup hosts.
Child job	For backup, a separate child job is created for each backup host to transfer data to the storage media. A child job can transfer data blocks from multiple Region servers.
Workload discovery file	During discovery, when the backup host communicates with the HMaster, a workload discovery file is created. The file contains information about the data blocks to be backed up and the associated Region servers.
Workload distribution file	After the discovery is complete, NetBackup creates a workload distribution file for each backup host. These files contain information of the data that is transferred by the respective backup host.
Parallel streams	The NetBackup parallel streaming framework allows data blocks from multiple Region servers to be backed up using multiple backup hosts simultaneously.
Backup host	The backup host acts as a proxy client. All the backup and restore operations are executed through the backup host. You can configure media servers, clients, or a primary server as a backup host. The backup host is also used as destination client during restores.
BigData policy	The BigData policy is introduced to: Specify the application type. Allow backing up distributed multi-node environments. Associate backup hosts. Perform workload distribution.
Application server	HMaster is referred to as a application server in NetBackup.
Primary HMaster	In a high-availability scenario, you need to specify one HMaster with the BigData policy and with the tpconfig command. This HMaster is referred as the primary HMaster.
Fail-over HMaster	In a high-availability scenario, the HMaster other than the primary HMaster that are updated in the `hbase.conf` file are referred as fail-over HMaster.

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