6.5
Table Of Contents
- Using VMware vSphere Replication
- Contents
- About Using VMware vSphere Replication
- Replicating Virtual Machines
- How the Recovery Point Objective Affects Replication Scheduling
- How the 5 Minute Recovery Point Objective Works
- How Retention Policy Works
- Replicating a Virtual Machine and Enabling Multiple Point in Time Instances
- Using vSphere Replication with Virtual SAN Storage
- Using vSphere Replication with vSphere Storage DRS
- How vSphere Replication Synchronizes Data Between vCenter Server Sites During Initial Configuration
- Replicating Virtual Machines Using Replication Seeds
- Replicating a Virtual Machine in a Single vCenter Server Instance
- Best Practices For Using and Configuring vSphere Replication
- Configure Replication for a Single Virtual Machine to vCenter Server
- Configure Replication for Multiple Virtual Machines to vCenter Server
- Move a Replication to a New vSphere Replication Server
- Stop Replicating a Virtual Machine
- Reconfiguring Replications
- Reconfigure Recovery Point Objectives (RPO) in Replications
- Resize the Virtual Machine Disk Files of a Replication that Uses Replication Seeds
- Resize Virtual Machine Disk Files of a Replication that Does Not Use Replication Seeds
- Change the Point in Time Settings of a Replication
- Change the Target Datastore Location of a Replication
- Monitoring and Managing Replications in vSphere Replication
- Performing a Recovery with vSphere Replication
- Troubleshooting vSphere Replication
- Generate vSphere Replication Support Bundle
- 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 Not Authenticated 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
- 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 Operations Fail with Authentication Error
- 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
- Configuring Replication Fails Because Another Virtual Machine has the Same Instance UUID
- Not Active Replication Status of Virtual Machines
- vSphere Replication Operations Run Slowly as the Number of Replications Increases
- Error at Reconfiguring the vSphere Replication Management Server from the Virtual Appliance Management Interface
- Unable to Establish an SSH Connection to the vSphere Replication Appliance
- The Replication Pauses When You Add a New Disk To the Source VM
- The vSphere Replication Appliance Root File System Switches to Read-only Mode and Login Fails
n
If the allocation information is not available at either site, data synchronization is done by comparing
all blocks between the source site and the target site, even if many of the blocks have not been
allocated on the disk by the guest OS. This is the slowest method for data synchronization.
Note The availability of block allocation information has little effect on the speed of data synchronization
for VMDK disks that are almost full.
Factors That Aect the Availability of Block Allocation
Information
The availability of allocation information and the degree to which vSphere Replication can use it to
accelerate data synchronization depend on the ESXi versions, the vSphere Replication Management
server versions, the type of VMDK disks, and the type of volumes on which the disks reside.
Product Versions at the
Source and the Target
Site
The acceleration of initial synchronization is supported only on ESXi hosts
6.0.x or later.
If the ESXi and the vSphere Replication Server on the source site are 6.x or
later, but the vSphere Replication Server or the hosts at the target site are
not 6.x or later, the allocation information will be available only on the
source site.
If the vSphere Replication Management servers at the source and at the
target site are both 6.x, but one or more ESXi hosts at the target site are
not 6.0 or later, if the vSphere Replication Management server selects a
target host that is not 6.0 or later, there will be no allocation information
available on the target site.
Note Because vSphere Replication Management server 6.x cannot select
only ESXi 6.0 hosts for the initial synchronization, the acceleration of the
operations might vary depending on the selected host. To achieve
maximum acceleration, all ESXi hosts at the target site that act as storage
servers for vSphere Replication should be ESXi 6.0 or later.
The Type of the
Datastore
Disks on VMFS or VSAN datastores provide full allocation information.
NFS datastores cannot provide allocation information for the disks that are
located on them.
Note Replication disks on the source and the target site can be on
different datastore types. The acceleration of the initial synchronization
depends on whether both sites can provide allocation information, or only
one site. If none of the sites can provide allocation information, no
acceleration occurs.
The Type of Virtual Disk Lazy zeroed thick disks, thin disks, and vSAN sparse disks, Space-Efficient
sparse disks, and VMDK sparse snapshots provide allocation information.
Using VMware vSphere Replication
VMware, Inc. 12