NetBackup for MongoDB terminologies
The following table defines the terms you come across when using NetBackup for protecting MongoDB cluster.
Table: NetBackup terminologies
Terminology | Definition |
|---|---|
Compound job | A backup job for MongoDB data is a compound job.
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Discovery job | When a backup job is executed, first a discovery job is created. The discovery job communicates with the config server and gathers information of the shards that need to be backed up and the associated nodes. 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 secondary nodes. |
Workload discovery file | During discovery, when the backup host communicates with the config server, a workload discovery file is created. The file contains information about the data files to be backed up and the associated data nodes. |
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 backed up by the respective backup host. |
Parallel streams | The NetBackup parallel streaming framework allows data blocks from multiple secondary nodes to be backed up using multiple backup hosts simultaneously. |
Backup host | The backup host acts as a proxy client. All the backup and the restore operations are executed through the backup host. You can configure media servers, clients, or a master server as a backup host. The backup host is also used as destination client during restores. |
BigData policy | The BigData policy is introduced to:
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Application server |
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Primary config server | In a high-availability scenario, the primary config server is the MongoDB instance running in a primary role on a config server replica set. The primary config server must have at least one associated mongos service running on the same host. |
Fail-over config server | In a high-availability scenario, the config server other than the primary config server that is specified as alternate_config_server in the |