PowerProtect Data Manager 19.16 File System User Guide

Configure the file system parallel backup setting

PowerProtect Data Manager enables you to run file system backups in parallel to reduce the time taken for backups. This setting defines the maximum concurrent network sessions from the client to the DD system at any given time. You can specify the number of streams to use for the backup in the configuration file .ddfssv.fsagentconfig or through the self-service CLI. However, it is recommended that you set the parallelism value in the configuration file as the parallelism value provided in the configuration file takes precedence over the parallelism value that is provided in the CLI.

To specify the number of streams to use for the backup, you can set the file system parameter --max-host-streams in the .ddfssv.fsagentconfig file that is located in the C:\Program Files\DPSAPPS\fsagent\settings directory on the file system host. This value must be an integer. The default value is 8.

For example, if you set the --max-host-streams parameter value to 6, the File System agent backups run with 6 streams:

--max-host-streams=6

You can also use the command-line option -M to specify the number of streams to use for the backup. For example:

ddfssv -LL -l INCR -z -M 4 -a DFA_SI=TRUE -a DFA_SI_USE_DD=TRUE -a DFA_SI_DD_HOST=protection_storage_system_ip_address -a DFA_SI_DD_USER=protection_storage_user -a DFA_SI_DD_PASSWORD=protection_storage_system_password -a DFA_SI_DEVICE_PATH=protection_storage_device_path I:

where:

-a "DFA_SI_DD_HOST=protection_storage_system_ip_address"

Specifies the name of the DD server that contains the storage unit where you want to back up the databases.

-a "DFA_SI_DD_PASSWORD=protection_storage_system_password"

Specifies the password of the protection storage system user.

-a "DFA_SI_DEVICE_PATH=protection_storage_device_path"

Specifies the name and the path of the protection storage device where you want to direct the backup.

-a "DFA_SI_DD_USER=protection_storage_user"

Specifies the protection storage username. For example, sysadmin.

Recommendations for optimal performance:

• Tune the parallelism value based on the resources that are available on your system, including the CPU, the number of assets, and the connection bandwidth to the DD system.
• Set the parallelism value equal to the number of CPU cores on the host.
• Run backups in parallel for several assets that are small in size, as opposed to running backups in parallel for a few assets that are large in size.