5.5
Table Of Contents
- VMware vSphere Replication Administration
- Contents
- vSphere Replication Administration
- Updated Information
- Overview of VMware vSphere Replication
- vSphere Replication Roles and Permissions
- vSphere Replication System Requirements
- Installing vSphere Replication
- 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
- Reconfigure vSphere Replication to Use an External Database
- Use the Embedded vSphere Replication Database
- Replicating Virtual Machines
- How the Recovery Point Objective Affects Replication Scheduling
- Replicating a Virtual Machine and Enabling Multiple Point in Time Instances
- Using vSphere Replication with Virtual SAN Storage
- Replicating Virtual Machines Using Replication Seeds
- Replicating a Virtual Machine in a Single vCenter Server Instance
- Configure Replication for a Single Virtual Machine
- Configure Replication for Multiple Virtual Machines
- Move a Virtual Machine to a New vSphere Replication Server
- Stop Replicating a Virtual Machine
- Reconfiguring Replications
- Performing a Recovery with vSphere Replication
- Monitoring and Managing Replications in vSphere Replication
- Troubleshooting vSphere Replication
- vSphere Replication Limitations
- Access the vSphere Replication Logs
- vSphere Replication Events and Alarms
- Solutions for Common vSphere Replication Problems
- Error at vService Bindings When Deploying the vSphere Replication Appliance
- OVF Package is Invalid and Cannot be Deployed
- Connection Errors Between vSphere Replication and SQL Server Cannot be Resolved
- Application Quiescing Changes to File System Quiescing During vMotion to an Older Host
- Configuring Replication Fails for Virtual Machines with Two Disks on Different Datastores
- vSphere Replication Service Fails with Unresolved Host Error
- Scalability Problems when Replicating Many Virtual Machines with a Short RPO to a Shared VMFS Datastore on ESXi Server 5.0
- vSphere Replication Sites Appear in the Disconnected State
- Error Recovering Virtual Machine in a Single vCenter Server Instance
- vSphere Replication RPO Violations
- vSphere Replication Appliance Extension Cannot Be Deleted
- vSphere Replication Does Not Start After Moving the Host
- Unexpected vSphere Replication Failure Results in a Generic Error
- Increase the Memory of the vSphere Replication Server for Large Deployments
- Reconnecting Sites Fails If One Of the vCenter Servers Has Changed Its IP Address
- Uploading a Valid Certificate to vSphere Replication Results in a Warning
- vSphere Replication Server Registration Takes Several Minutes
- Generating Support Bundles Disrupts vSphere Replication Recovery
- vSphere Replication Operations Take a Long Time to Complete
- vSphere Replication Does Not Display Incoming Replications When the Source Site is Inaccessible
- vSphere Replication is Inaccessible After Changing vCenter Server Certificate
- vSphere Replication Cannot Establish a Connection to the Hosts
- Anti-virus Agent in Firewall Terminates Virtual Machine Replication
- Initial Full Synchronization of Virtual Machine Files to VMware Virtual SAN Storage Is Slow
- vSphere Web Client 5.1.x Non-Functioning Option Binds vSphere Replication Traffic to a Specific vmknic
- Configuring Replication Fails After Rebuilding VRMS
- vSphere Replication Operations Run Slowly as the Number of Replications Increases
Scalability Problems when Replicating Many Virtual Machines with
a Short RPO to a Shared VMFS Datastore on ESXi Server 5.0
Performance might be slow if you replicate a large number of virtual machines with a short Recovery
Point Objective (RPO) to a single virtual machine file store (VMFS) datastore that is accessible by
multiple hosts on the recovery site.
Problem
This problem occurs when running ESXi Server 5.0 on the recovery site. It can result in missed RPO
targets.
The number of virtual machines that can successfully replicate to a single, shared VMFS datastore
increases if the RPO targets are longer.
Follow the guidelines when calculating the number of virtual machines that you should replicate to a
single VMFS volume on the recovery site.
n
If all your virtual machines have an RPO of 15 minutes, performance is affected when replicating 50
to 100 virtual machines to the same VMFS datastore.
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If all your virtual machines have an RPO of 30 minutes, performance is affected when replicating 100
to 200 virtual machines to the same VMFS datastore.
If you have heterogeneous RPO targets in a protection group, calculate the harmonic mean of the RPO
targets when calculating the number of virtual machines that you can replicate to a single VMFS volume.
For example, if you have 100 virtual machines with an RPO of 20 minutes and 50 virtual machines with
an RPO of 600 minutes, you calculate the harmonic mean of the RPO as follows:
150/(100/20 + 50/600) = ~30
In this example, the configuration is similar to a setup with 150 virtual machines, each having an RPO of
approximately 30 minutes. In this case, performance is affected if these 150 virtual machines replicate to
a single VMFS volume.
Cause
This problem affects only VMFS datastores that are shared by multiple hosts. It does not occur on
datastores that are local to one host or on other datastore types, such as NFS. This problem affects only
installations that are running ESXi Server 5.0.
The number of vSphere Replication servers is not relevant. These limits apply to the number of virtual
machines that you can replicate to a single VMFS datastore.
Solution
1 Upgrade ESXi Server to version 5.1 or later on the recovery site.
VMware vSphere Replication Administration
VMware, Inc. 84