6.5
Table Of Contents
- VMware vSphere Replication Installation and Configuration
- Contents
- vSphere Replication Installation and Configuration
- Updated Information
- Overview of VMware vSphere Replication
- vSphere Replication System Requirements
- Installing and Uninstalling vSphere Replication
- Install vSphere Replication
- Uninstall vSphere Replication
- Unregister vSphere Replication from vCenter Server if the Appliance Was Deleted
- Configuring the Customer Experience Improvement Program
- Isolating the Network Traffic of vSphere Replication
- Set Up a VMkernel Adapter for vSphere Replication Traffic on a Source Host
- Set Up a VMkernel Adapter for vSphere Replication Traffic on a Target Host
- Create a VM Network Adapter to Use for Incoming Replication Traffic on the Combined vSphere Replication Appliance
- Create VM Network Adapters to Isolate the Network Traffic of a vSphere Replication Server
- Deploying Additional vSphere Replication Servers
- Upgrading vSphere Replication
- Reconfigure the vSphere Replication Appliance
- Reconfigure General vSphere Replication Settings
- Change the SSL Certificate of the vSphere Replication Appliance
- Change the Password of the vSphere Replication Appliance
- Change Keystore and Truststore Passwords of the vSphere Replication Appliance
- Configure vSphere Replication Network Settings
- Configure vSphere Replication System Settings
- Update the NTP Server Configuration
- Reconfigure vSphere Replication to Use an External Database
- Use the Embedded vSphere Replication Database
- vSphere Replication Roles and Permissions
Network Based Storage
Network bandwidth requirements increase if all storage is network-based because data operations
between the host and the storage also use network. When you plan your deployment, be aware of the
following levels of traffic:
n
Between the host running the replicated virtual machine and the vSphere Replication server.
n
Between the vSphere Replication server and a host with access to the replication target datastore.
n
Between the host and storage.
n
Between storage and the host during redo log snapshots.
Network based storage is a concern when you are replicating virtual machines within a single vCenter
Server instance that shares the network for the levels of traffic listed. When you have two sites with a
vCenter Server instance on each site, the link speed between the two sites is the most important as it can
slow down replication traffic between the two sites.
Dataset Size
vSphere Replication might not replicate every virtual machine nor every VMDK file in the replicated virtual
machines. To evaluate the dataset size that vSphere Replication replicates, calculate the percentage of
the total storage used for virtual machines, then calculate the number of VMDKs within that subset that
you have configured for replication.
For example, you might have 2TB of virtual machines on the datastores and usevSphere Replication to
replicate half of these virtual machines. You might only replicate a subset of the VMDKs and assuming all
the VMDKs are replicated, the maximum amount of data for replication is 1TB.
Data Change Rate and Recovery Point Objective
The data change rate is affected by the recovery point objective (RPO). To estimate the size of the data
transfer for each replication, you must evaluate how many blocks change in a given RPO for a virtual
machine. The data change rate within the RPO period provides the total number of blocks that
vSphere Replication transfers. This number might vary throughout the day, which alters the traffic that
vSphere Replication generates at different times.
vSphere Replication transfers blocks based on the RPO schedule. If you set an RPO of one hour,
vSphere Replication transfers any block that has changed in that hour to meet that RPO.
vSphere Replication only transfers the block once in its current state at the moment that
vSphere Replication creates the bundle of blocks for transfer. vSphere Replication only registers that the
block has changed within the RPO period, not how many times it changed. The average daily data
change rate provides an estimation of how much data vSphere Replication transfers or how often the
transfers occur.
VMware vSphere Replication Installation and Configuration
VMware, Inc. 18