Installing Virtual Replication Appliances
The Zerto installation includes the installation package for Virtual Replication Appliances (VRAs).
A VRA is a Zerto virtual machine that manages the replication of virtual machines across sites.
■ A VRA must be installed on every ESX/ESXi or Hyper-V which hosts virtual machines that require protecting in the protected site and on every ESX/ESXi or Hyper-V that will host the replicated virtual machines in the recovery site.
■ The VRA compresses the data that is passed across the WAN from the protected site to the recovery site.
■ The VRA automatically adjusts the compression level according to CPU usage, including totally disabling it if needed.
■ A VRA can manage a maximum of 1500 volumes, whether these volumes are being protected or recovered.
■ The VRA is a custom, very thin, Linux-based virtual machine with a small footprint, disk – memory and CPU – and increased security since there are a minimum number of services installed.
■ Zerto recommends installing a VRA on every hypervisor host so that if protected virtual machines are moved from one host in the cluster to another host in the cluster there is always a VRA to protect the moved virtual machines.
■ (Hyper-V only) When running Hyper-V hosts on 2012 R2, verify that User Account Control: Run all administrators in Admin Approval Mode security policy setting is set to Disabled. This can be found in the path:
Computer Configuration\Policies\Windows Settings\Security Settings\Local Policies\Security Options\User Account Control
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