Specifications
An example of relocating all of a virtual machine’s disks to a datastore named new_datastore:
svmotion --url=https://myvc.mycorp.com/sdk
--username=me
--password=secret
--datacenter=DC1
--vm='[old_datastore] myvm/myvm.vmx: new_datastore'
An example of relocating a virtual machine to new_datastore, while leaving the disks, myvm_1.vmdk and
myvm_2.vmdk on old_datastore:
svmotion --datacenter='My DC'
--vm='[old_datastore] myvm/myvm.vmx:
new_datastore'
--disks='[old_datastore] myvm/myvm_1.vmdk:
old_datastore,
[old_datastore] myvm/myvm_2.vmdk:
old_datastore'
Limits on Simultaneous Migrations
vCenter Server places limits on the number of simultaneous virtual machine migration and provisioning
operations that can occur on each host, network, and datastore.
NOTE Simultaneous migrations with vMotion can only occur if the virtual machine is moving between hosts
in the same cluster and is not changing its resource pool.
Each operation, such as a migration with vMotion or cloning a virtual machine, is assigned a resource cost.
Each type of resource, such as host, datastore, or network, has a maximum cost that it can support at any one
time. Any new migration or provisioning operation that would cause a resource to exceed its maximum cost
does not proceed immediately, but is queued until other operations complete and release resources. Each of
the network, datastore, and host limits must be satisfied in order for the operation to proceed.
Network Limits
Network limits apply to migrations with vMotion only. Network limits depend on both the version of ESXi
and the network type.
Table 12-3 lists network limits for migration with vMotion.
Table 12-3. Network Limits for Migration with vMotion
Operation ESX/ESXi Version Network Type Maximum Cost
vMotion 3.x 1GigE and 10GigE 2
vMotion 4.0 1GigE and 10GigE 2
vMotion 4.1, 5.0 1GigE 4
vMotion 4.1, 5.0 10GigE 8
All migrations with vMotion have a network resource cost of 1.
Datastore Limits
Datastore limits apply to migrations with vMotion and with Storage vMotion. A migration with vMotion
involves one access to the datastore. A migration with storage vMotion involves one access to the source
datastore and one access to the destination datastore.
vCenter Server and Host Management
134 VMware, Inc.