Vmlimitperdatastore

The vmlimitperdatastore option specifies the number of virtual machines (VMs) and virtual disks in a datastore that can be processed in parallel during an optimized backup operation.

An optimized backup operation is one in which parallel backup capability is enabled at the VM, virtual disk, or subdisk level.

The vmlimitperdatastore option works with the vmmaxparallel, vmmaxbackupsessions, and vmlimitperhost options to optimize backup operations and to help control the amount of resources that the backup can create on a host in the vSphere infrastructure. Adjust the values of these options to find the values that provide optimal performance for the backups that are in your environment.

This feature is available only if the client operates as a data mover for IBM Spectrum Protect for Virtual Environments: Data Protection for VMware.

Supported clients

Linux operating systems This option can be used with supported x86_64 Linux clients.

Windows operating systems This option can be used with supported Windows clients.

Options file

Linux operating systems This option is valid in the client system options file (dsm.sys), in the client options file (dsm.opt) or on the command line for Backup VM. It can also be included on the server in a client options set. It cannot be set in the Preferences Editor.

Windows operating systems This option is valid in the client options file (dsm.opt) or on the command line for Backup VM. It can also be included on the server in a client options set. It cannot be set in the Preferences Editor.

Syntax

Parameters

integer: Specifies the maximum number of VMs in any one datastore that are included during an optimized backup operation. The maximum that you can specify is 50 VMs. The default is 0 (zero).; Specifying 0 means that you are not concerned about how many VMs can be backed up in parallel from a datastore. Instead, you want to limit the maximum number of VMs to include in a backup by using the value that you specify on the vmmaxparallel option. The vmlimitperdatastore option is enforced even when VM data exists in two or more datastores.

Examples

Options file: VMLIMITPERD 5
Command line:: dsmc backup vm -VMLIMITPERD=5