MVG load balancing levels
MVG server selects a disk volume for a client and policy combination as the primary or historic node based on one of the following load balancing levels when a backup job starts.
By default, MVG uses the Gold level. It is not recommended to use other levels in a customer environment unless necessary.
Table: MVG load balancing levels
Level | Description |
|---|---|
Gold (Default) | The following criteria are used when assigning a new client+policy to a disk volume:
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Silver | The following criteria are used when assigning a new client+policy to a disk volume:
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Bronze | The following criterion is used when assigning a new client+policy to a disk volume:
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Iron | The following criterion is used when assigning a new client+policy to a disk volume:
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Additional notes:
In a backup job, with any LB level, whether it is a new or existing client+policy combination, MVG server doesn't return a disk volume that is detected as inactive or full, regardless of the effort it makes. Exceptions include when a disk volume is in maintenance mode, its downtime hasn't exceeded the rebalance freezing time, or in extreme cases where every disk volume in the current MVG volume is unavailable.
The LB levels do not apply to image read or deletion jobs, as the MVG server directly returns the disk volume that manages the image.
It is not recommended to use LB levels other than "Gold" in a production environment, unless necessary.
With the default LB level "Gold", it is recommended to set the media servers of the MSDP servers as the load balance media servers for the MVG server. You can configure this in the NetBackup Web UI under the storage server details.