In the vCloud Availability Portal or in the vCloud Availability vSphere Client Plug-In, you can protect or migrate workloads by replicating vApps or virtual machines.

Protect or migrate vApps and virtual machines by replicating them from one site to another.

Replication Types

  • Protecting a vApp or a virtual machine from one organization to another keeps the workload running in the source site.
  • Migrating a vApp or a virtual machine to a remote organization runs the workload in the destination site.

Recovery Point Objective - RPO

The RPO is the longest tolerable timeframe of data loss. For example, with one hour RPO the recovered virtual machine can have no more than one hour of data lost. Shorter RPO intervals, ensure less data loss during recovery, at the expense of consuming more network bandwidth to keep the replica up to date. For more information on the RPO setting, see How the Recovery Point Objective Affects Replication Scheduling in the VMware vSphere Replication Administration documentation.

When each virtual machine reaches its RPO target, the vCloud Availability Replicator writes about 3800 bytes in the vCenter Server events database. Low RPO values, increase the volume of event data in the database. You can limit the number of days that vCenter Server retains event data, or set a higher RPO value to reduce the volume of event data.

Note: For a migration, the RPO is 24 hours by default.

Quiescing

vCloud Availability Replicator guarantees a crash consistency among all disks in a virtual machine. If you use quiescing, you might obtain a higher level of crash consistency among the disks that belong to a virtual machine. The operating system of a virtual machine determines the available quiescing types. Quiescing is available only for virtual machine operating systems that support quiescing. For more information, see Guest OS Quiescing Support in the vSphere Replication documentation.

Replicated Workload Settings

vCloud Availability preserves and periodically synchronizes the vCloud Director settings that accompany the vApps or the virtual machines in a replication. After a successful protection or migration, vCloud Availability reads these settings from the source site and applies them to the destination site, at the end of the replication workflow.
Table 1. Replicated vApp Settings
vApp Settings Replicated in vCloud Availability 3.0 Replicated in vCloud Availability 3.5
vApp Name Yes Yes
Description Yes Yes
Leases - -
Starting and Stopping VMs Configuration - -
Мetadata Yes Yes
vApp Networks - Yes
Table 2. Replicated VM Settings
VM Settings Replicated in vCloud Availability 3.0 Replicated in vCloud Availability 3.5
VM Name Yes Yes
Computer name Yes Yes
Description Yes Yes
Hot add settings - -
Guest OS Customization - Yes
Guest properties - Yes
Resource allocation - -
Metadata Yes Yes