Are there any special requirements or processes to keep in mind for migration of large or heavily used virtual...
When it comes to optimizing the VM live migration process, most of your efforts should focus on memory and network connectivity.
First, remember the overall host workload. It is important not to fully utilize the source or destination host if you plan to perform a VM live migration. Obviously, the destination host must have sufficient free resources to accommodate the inbound VM, but there is more to it than that. The migration process requires the hypervisor to use memory and CPU resources. An optimal migration depends on the availability of sufficient host stores.
More on improving VM live migrations
Tips to securing your VM live migration
Best practices to accelerate live migrations
Overview of VM live migration changes in Windows Server 2012 R2
Comparing the differences between Hyper-V Live Migration and VMware vMotion
Another consideration is the hardware resources that have been allocated to the VM. Migrating a running VM involves copying pages of memory. If a VM is being heavily utilized, then it is possible that memory pages may be modified faster than they can be copied, which could result in a failed migration.
Stun During Page Send (SDPS) is a feature in vSphere5 that can slow down a VM during the migration process and help keep memory transaction backlog from becoming problematic. However, it is usually better to make sure in advance that your VM is equipped to keep pace with demand, rather than resort to slowing down the VM.
Both VMware and Microsoft offer best practices for VM live migration that are tailored to their own platforms. VMware's vMotion Best Practices are available online. Microsoft also maintains a best practices checklist online for Hyper-V.
Dig Deeper on Virtual machine provisioning and configuration
Related Q&A from Brien Posey
Some cloud-based DR service providers are using removable media to circumvent any restoration and synchronization issues customers might encounter.continue reading
You don't always need users' passwords to fix problems with Windows desktops. If the computer is domain-joined, you can use any account.continue reading
While it may seem that you should never switch off the deduplication process, there are two instances where that may be the best solution for your ...continue reading
Have a question for an expert?
Please add a title for your question
Get answers from a TechTarget expert on whatever's puzzling you.