When you configure protection on multiple virtual machines, the configuration fails with a placeholder creation error.
Configuring protection on a large number of virtual machines at the same time fails with either a placeholder creation timeout error or a placeholder creation naming error:
Placeholder VM creation error:Operation timed out:300 seconds
Placeholder VM creation error:The name 'placeholder_name' already exists
This problem occurs when you configure protection in different ways:
You create a protection group that contains a datastore or datastores that contain a large number of virtual machines.
You use the Site Recovery Manager interface on a large number of virtual machines.option in the
You use the Site Recovery Manager API to protect a large number of virtual machines manually.
The infrastructure on the recovery site is unable to handle the volume of concurrent creations of placeholder virtual machines.
Increase the replication.placeholderVmCreationTimeout setting from the default of 300 seconds. See Change the Timeout for the Creation of Placeholder Virtual Machines.
You do not need to restart Site Recovery Manager Server after changing this setting. Site Recovery Manager applies the setting the next time that you configure protection on a virtual machine.