vSphere Replication Calculator

Complete the input below to estimate average recovery point objective (RPO), Network bandwidth requirements, or number of virtual machines that can be replicated.

Average replicated MB per VM per day

1549

Recommended maximum number of replicated VMs

300

Recommended Minimum Megabits per second (Mbps) Throughput

Recommended Lowest Average RPO (minutes)

What version of vSphere are you using?

Select the version of vSphere you are using.

Are you trying to solve for network bandwidth, RPO, or number of VMs?

Select what you are trying to solve for in this analysis.

Total number of VMs in your environment

Empty Field

Enter the total number of virtual machines in the environment (default 400, minimum 1).

Total number of VMs in your environment to be replicated

Empty Field

Enter the total number of virtual machines in your environment to be replicated (default 200, minimum 1, maximum 2000).

Average number of virtual disks per VM

Empty Field

Average number of virtual disks (.vmdk files) attached to each virtual machine (default 1, minimum 1).

Average size of virtual disks (GB)

Empty Field

Enter the average virtual disk (.vmdk) size in GB (default 72, minimum 1).

Average capacity utilization of virtual disks (percent)

Empty Field

Average utilization of virtual disks in the environment. For example, if the average percentage of free space on each virtual disk is 30%, average utilization = 70% (default 70%, must be 1-100%).

Total data to be replicated (GB)

Is replication compression enabled for VMs?

Select yes if replication compression is enabled for VMs.

Average daily data change rate (percent)

Empty Field

Average percentage of data that changes in each virtual machine (default 3, must be 1-100%).

Largest data change burst (percent)

Empty Field

Largest percentage of changed data that changes in a short amount of time. For example, a virtual machine with 100GB of data has a daily change rate of 5% = 5GB. However, 1.25GB occurs at one time = 25% burst. This is factored into vSphere Replication's ability to meet the RPO at any point during the day (default 25%, must be 1-100%).

Amount of changed data per day (GB)

302.4

Average round trip time (RTT) in milliseconds

Empty Field

Enter the Round Trip Time (RTT) in milliseconds. This number can be obtained by pinging the target location from the source location (between 1-1000).

Packet loss percentage

Empty Field

Enter the Packet loss percentage is normally very low (between 0.1%-10%).

Average available network bandwidth for replication (Mbps)

Empty Field

Average available bandwidth on the WAN link. For example, a 45Mbps link 60% utilized = 18Mbps of available bandwidth.

Average recovery point objective (RPO) (minutes)

Empty Field

Average RPO across all replicated virtual machines. For example, 100 virtual machines with a 120-minute RPO and 100 virtual machines with a 360-minute RPO would have an average RPO of 240 minutes (Default 240, must be 5 to 1440).

Complete the input below to estimate average recovery point objective (RPO), Network bandwidth requirements, or number of virtual machines that can be replicated.

Average replicated MB per VM per day

1549

Recommended maximum number of replicated VMs

300

Recommended Minimum Megabits per second (Mbps) Throughput

Recommended Lowest Average RPO (minutes)