#Vmware 6.0 interview questions windows#

HA has been rewritten from the ground up to shed some of those constraints that were enforced by AAM. 3Q) What architecture changes were seen between ESXi 4.1 and 5.0?Р”Р„ns: vSphere 5.0 comes to a new HA architecture. Because a server crash is an unexpected thing. But here you will get a downtime of 5 РІР‚вЂњ10 mins. But with the help of VMware HA, these VM's can be restarted immediately on the other ESX servers in the same cluster. Assume like, for some reason if anyone of the ESX server in the cluster goes down suddenly, what happens to the virtual machines which are running on that particular server? Are they continue to run or go down. 2Q) We have a lot of features like VMotion, DRS, SMP, etc, but why we need HA?Р”Р„ns: We need this because we need our services running without interruption. In the event of server failure, affected virtual machines are automatically restarted on other production servers with spare capacity. Users will not see any interruption.VMware vSphere Interview Questions 1Q) How will you define VMware HA?Р”Р„ns: VMware High Availability (HA) provides easy to use, cost-effective high availability for applications running in virtual machines. It happens automatically without data loss, without downtime and with a little delay. In case of host failure, secondary VM will become primary and continuing the execution from the exactР’В point where the primary VM is left off or failed. But in FT enabled virtual machine, there is noР’В downtime. So the restart duration of the virtual machine is the downtimeР’В for the virtual machine in HA cluster. How does Vmware FT differs from VMware HA?Р”РЋ.VMware HA is enabled per cluster basis but FT is enabled per VM basis.Р”Сћ.Р’В In caseР’В of ESX host failure, virtual machines in the failed host are restarted and powered-on on the other active hosts in HA cluster. FT failover between primary and secondary willР’В occure even if the vCenter is down. VCenter server is only required to enable FT on the virtual machine.once it is configured, vCenter is not required to be in online for FT to work. When a failure is detected on the primary VMРІР‚в„ўs ESX host, the secondary virtual machine which is running on the another ESX server in the same cluster will takes the place of the first one with theР’В least possible interruption of service. What will happen when the ESX host of primary VM failed? The primary and secondary virtual machine resides on a different ESX hosts in the cluster. When you enable Fault Tolerance for the virtual machine, aР’В secondaryР’В virtual machine (live shadow image of the primary) will be created to work with the primary virtual machine in which you haveР’В enabled FT. What happens when you enabled Fault Tolerance for your virtual machine? Validate that at least one shared datastore exists Validate that the host hardware supports Fault Tolerance. Validate that all the hosts in the cluster have the same build for Fault Tolerance Validate that VMotion NIC speed is at least 1000 Mbps. Validate that Fault Tolerance logging is enabled. Validate that power management is supported on the host Validate that Fault Tolerancelogging NIC speed is at least 1000 Mbps. The below checks as specified below will be performed as part of the compliance check. One way from vSphere client is to run the cluster complaince check from profile compliance tab of your cluster. How do i check my host for FT compatibility from vSphere client? Please refer myР’В blog postР’В on Virtual Machine Requirements for VMware Fault Tolerance What are Requirements and Limitations for Virtual Machine to Enable FT ? Please refer my blog post on ESX Host -Infrastrcuture Requirements & Limitations for VMware Fault ToleranceР’В to see the ESX requirements for VMware FT. What are requirements and Limitattions for ESX hosts & infrastructure components to run FT protected virtual machines in Vsphere 4 & 4.1? VMware FT using a technology called vLockstepР’В technology What is the name of theР’В technologyР’В used by VMware FT? VMware Fault Tolerance is a component of VMware vSphere and it provides continuous availability to applications by preventing downtime and data loss of Virtual machines in the event of ESX serverР’В failures.

#Vmware 6.0 interview questions windows#

Diff VCenter 5.5 appliance and vCenter on WIndows.