What is FT VMware?
vSphere Fault Tolerance (FT) provides a live shadow instance of a virtual machine (VM) that mirrors the primary VM to prevent data loss and downtime during outages.
What is the difference between VMware ha and VMware ft?
Within VMware, FT ensures availability by keeping VM copies on a separate host machine. With only HA configured, the hypervisor attempts to restart the VM on the same host cluster. With FT, the VM workload is moved to a separate host.
Why VMware ft is required?
The following CPU and networking requirements apply to FT. CPUs that are used in host machines for fault tolerant VMs must be compatible with vSphere vMotion. Also, CPUs that support Hardware MMU virtualization (Intel EPT or AMD RVI) are required. AMD Bulldozer or later.
What is vLockstep technology in VMware?
VMware vLockstep is technology that captures inputs and events that occur on a primary virtual machine (VM) and sends them to a secondary VM. VMware vLockstep is the technology that supports VMware’s Fault Tolerance component of VMware vSphere.
What is VMware HA and DRS?
The most common types of VMware vSphere clusters are High Availability (HA) and Distributed Resource Scheduler (DRS) clusters. HA clusters are designed to provide high availability of virtual machines and services running on them; if a host fails, they immediately restart the virtual machines on another ESXi host.
What is FT logging?
FT works by creating a secondary VM on another ESX host that shares the same virtual disk file as the primary VM, and then transfers the CPU and virtual device inputs from the primary VM (record) to the secondary VM (replay) via an FT logging NIC so that it is in sync with the primary and ready to take over in case of …
Can you identify difference between HA and FT & HA and DRS?
VMware HA and DRS are each able to provide availability for VMs. The main difference between the two technologies is that VMware designed DRS to work in clustered environments, while HA enables admins to protect their VMs without having to deal with the cost or complexity of a failover cluster.
Can you identify difference between HA and FT?
FT is notable for the absence of downtime, while HA requires time to reboot. In addition, HA works on each cluster, while FT works on each virtual machine.
How many vCPUs can be used for a VM in Ft?
As to VMware licensing for FT, you have access to FT with vSphere Standard, but you can only configure two vCPUs. To activate four vCPUs for your FT-protected VMs, you need to be on Enterprise Plus or vSphere with Operations Management.
What is vCenter High Availability?
vCenter High Availability (VCHA) is a features introduced in VMware vSphere 6.5 that eliminates the single point of failure of vCenter and is available for the VCSA 6.5 only. To implement a VCHA cluster, only a single vCenter license (standard license is sufficient) is required.
Which technology is used in FT in VMware?
VMware FT relies on deterministic record/replay technology described above. When VMware FT is enabled for a virtual machine (“the primary”), a second instance of the virtual machine (the “secondary”) is created by live-migrating the memory contents of the primary using VMware® VMotion™.
Does Ha require doctor?
No, they are not. In fact, it is highly recommended to use both vSphere HA and VMware DRS together to combine automatic failover with load balancing features and functionality. If failure of an ESXi host occurs, vSphere HA will restart the VMs on the remaining healthy hosts in a vSphere Cluster.
How does ft work in a virtual machine?
FT provides continuous availability for such a virtual machine by creating and maintaining another VM that is identical and continuously available to replace it in the event of a failover situation. The protected virtual machine is called the Primary VM.
How does fault tolerance ( ft ) work in vSphere?
You can use vSphere Fault Tolerance (FT) for most mission critical virtual machines. FT provides continuous availability for such a virtual machine by creating and maintaining another VM that is identical and continuously available to replace it in the event of a failover situation.
Can a fault tolerant VM run on the same host?
A fault tolerant virtual machine and its secondary copy are not allowed to run on the same host. This restriction ensures that a host failure cannot result in the loss of both VMs. Note: You can also use VM-Host affinity rules to dictate which hosts designated virtual machines can run on.