Distributed Workloads for Replication

Updated

To restore multiple instances or VMs simultaneously, you can configure replication jobs to distribute the workload (instances or VMs) across multiple access nodes that are assigned to the destination hypervisor.

You can configure distributed workloads either in the recovery target or in a replication group created from a VM group by setting the Access node option to Automatic. The option to distribute workloads is available for replication both from streaming backups or IntelliSnap backup copies.

Access Node Assignments

Access node assignments vary slightly based on the vendor:

  • Amazon: The instances are assigned to the access nodes by a region match. When you perform a cross-vendor replication to an Amazon destination, if there are no access nodes available in the same region, then the Import method is used. Amazon to Amazon restores and replications run using the Hot Add method, so if no access nodes are available, then the job fails.

  • Microsoft Azure: First, the instances or VMs are assigned to the access nodes by a region match. If access nodes are not available in the same region, then the instances or VMs are assigned using the round-robin method.

  • Google Cloud Platform: First, the instances are assigned to the access nodes by a zone match. If access nodes are not available in the same zone, then the instances are assigned to access nodes in the same region. If there is no zone or region match, the access nodes are assigned using the round-robin method.

  • VMware: First, the VMs are assigned to the access nodes by a host match. If access nodes are not available in the same host, then the VMs are assigned to access nodes in the same data center. If there is no host or data center match, then VMs are assigned using the round-robin method.

  • VMware Continuous Replication: For continuous replication, access nodes are always assigned using the round-robin method.

The following table explains how replication operations are assigned to access nodes, based on the distributed workload setting, the location of the operation, and the type of operation performed.

Access node setting

Replicate to the same hypervisor

Replicate to a different hypervisor

Back up during failback

Replicate during failback

  • Recovery target: Automatic

  • Replication group: none

The access nodes in the hypervisor and VM Group are used for replication.

The access nodes on the destination site are used for replication.

The access nodes on the destination site are used for backup operations.

Both access nodes on the source site and the VM group are used for replication operations.

  • Recovery target: Automatic

  • Replication group: Specific access node

The access node specified in the replication group is used for replication.

The access node specified in the replication group is used for replication.

The access node specified in the replication group is used for backup operations on the destination site.

Both access nodes on the source site and the VM Group are used for replication operations.

  • Recovery target: Specific access node

  • Replication group: Automatic

The access nodes in the hypervisor and the VM group are used for replication.

The access nodes on the recovery target are used for replication.

The access nodes on the destination site are used for backup operations.

Both access nodes on the source site and the VM group are used for replication operations.