How to use the change rate and Internet upload and download speed to validate if the bandwidth meets the requirements for replication (4039967)

How to identify if the bandwidth between the source and target cores cannot accommodate the transfer of stored recovery points, and validate when is a good idea to use a seed drive or increase the bandwidth.

For reference or mode details, check the User Guide - Performance considerations for replicated data transfer.

Note: With Global Deduplication, the Rapid Recovery Replication process is self-optimizing with a unique Read-Match-Write (RMW) algorithm that is tightly coupled with deduplication. With RMW replication the source and target replication service matches keys before transferring data and then replicates only the compressed- encrypted- deduplicated data across the WAN resulting in a 10x reduction in bandwidth requirements.

When preparing for replication, consider the following factors:

1. Change rate: The change rate is the rate at which the amount of protected data is accumulated. The rate depends on the amount of data that changes on protected volumes and the protection interval of the volumes. Some machine types typically have a higher change rate, such as an Exchange email server. One way to reduce the change rate is to reduce the protection interval.
2. Bandwidth: The bandwidth is the available transfer speed between the source Core and the target Core. It is crucial that the bandwidth be greater than the change rate for replication to keep up with the recovery points snapshots create. For very large data transfers from Core to Core, multiple parallel streams may be required to perform at wire speeds up to the speed of a 1GB Ethernet connection.
   1. Source Core: Check the Upload/Upstream bandwidth available on the Internet connection.
   2. Target Core: Check the Download/Downstream bandwidth available on the Internet connection.

Note: Bandwidth that ISPs specify is typically the total available bandwidth. All devices on the network share the outgoing bandwidth. Make sure that there is enough free bandwidth for replication to accommodate the change rate or apply some QoS policy on your router or firewall device in order provide dedicated bandwidth for replication.