Vmware vSphere 5.5 Interview Questions

Vmware vSphere 5.5 Interview Questions

Question
What are different reasons to use SDRS ?
Answer
There are multiple reasons that one can look for SDRS 1. Providing smart virtual machine placement and load balancing mechanisms based on space and I/O capacity. 2. SIOC reactively throttles hosts and virtual machines to ensure fairness 3. proactively makes recommendations to prevent imbalances from both a space utilization and latency perspective
 
Question
What is VSA?
Answer
VSA is Virtual SAN Appliance . It is a software-based shared storage solution that enables high availability and automation in vSphere without shared storage hardware
 
Question
What is heapsize in VMFS ?
Answer
vSphere 5.5 introduces a much improved heap eviction process, which eliminates the need for large heap sizes. With vSphere 5.5 a maximum of 256MB of heap is needed to enable vSphere hosts to access the entire address space of a 64TB VMFS
 
Question
What is new in vSphere 5.5 ?
Answer
The new features include following: Doubled Host-Level Configuration Maximums Hot-pluggable PCIe SSD Devices Improved Power Management VM Compatibility ESXi 5.5 VM Latency Sensitivity and few more
 
Question
What is VLS(VM Latency Sensitivity) ?
Answer
Latency setting setting that can be tuned to help reduce virtual machine latency. When the Latency sensitivity is set to high the hypervisor will try to reduce latency in the virtual machine by reserving memory, dedicating CPU cores and disabling network features that are prone to high latency.
 
Question
What is the difference between vSphere HA and vSphere App HA ?
Answer
App HA brings application awareness to vSphere HA helping to further improve application uptime. vSphere App HA works together with VMware vFabric Hyperic Server to monitor application services running inside the virtual machine, and when issues are detected perform restart actions as defined by the administrator in the vSphere App HA Policy Whereas VMware vSPhere HA is for failover (With Reboot of guest OS ) of a VM to the Next available HOst in the cluster in case of a Host Failure
 
Question
What is new in this ?
Answer
New features have already been answered .
 
Question
Can we manage ESXi 5.6 from vSphere 5.5?
Answer
Always need to upgrade the client to handle any newer Version. However, I am not sure if 5.6 exist in the Market yet.
 
Question
How DCUI works?
Answer
DCUI connects the user to the console of ESXi directly. This has been replaced by earlier “Service Console” that existed in ESX versions. Some additional work that you can do in DCUI are: Lock mode settings , IP/DNS configs, SSH options …
 
Question
 
What is new in this vSphere from earlier?
Answer
Few features in addition to the previos answers are : vSphere App HA vSphere HA Compatibility with DRS Anti-Affinity vSphere Big Data Extensions(BDE) Support for 62TB VMDK Microsoft Cluster Server (MCSC) Updates 16Gb End-to-End Support
 
Question
Please detail about SR-IOV
Answer
vSphere 5.5 provides workflows for configuring SR-IOV as well as the ability to propagate port group properties to up to the virtual functions.
 
Question
What is Host Profiles ?
Answer
Host profiles check the compliance of the Host with respect to the compliance policy set with the given paraments of ESXi’s to be configured
 
Question
 
What are the I/O Controlls available in network and Storage ?
Answer
for network : Burst Size settings , IP Hashing, MAC Hashing, , Qos for Storage : Direct I/O Control , Path Selection Policy , Persistancy
 
Question
Does VMware now support MAC OS ?
Answer
VMware vSphere 5.5 supports MAC OS X
 
Question
 
What is Self-service file-level recovery (FLR) ?
 
Answer
It is a part of VDP that can allow recovering of file level objects. Also, Same can be achieved using some storage plugins like Netapp VSC using file recovery , Syamnatec Netbackup plugin for vSphere
 
Question
 
Give some benefits of vSphere 5.5 and Windows Server 2012 R2 Hyper-V
Answer
Comparison can made on different Maxims and Minimums configurations . Benefits can be situation/requirement Based. Both virtualization vendors supports commonly required features for DataCenter Virtualization.
 
Question
If we are upgrading vSphere , Do we need to take any backup of configuration ?
 
Answer
Usually I terms of backup during upgrade , networking is the main object that can be backed up . rest can be taken from the Database Inventory of vCenter .
 
Question
What is licensing policy for vCenter server?
Answer
Licensing of vCenter Server is Instance Based. So one license for each Instance of vCenter
 
Question
Are there any limitations while replicating virtual machines in vSphere ?
Answer
 
Few limitations: If you move a virtual machine with replicated disks over 2032GB back to a machine on an older release, vSphere Replication cannot replicate or power on the virtual machine. Full sync of very large disks can take days. vSphere Replication must track changed blocks and consumes more memory on larger disks.
 
Question
What are the compatibility and features available with SSD Card in vSphere 5.5
Answer
vSphere 5.5 provides the ability to perform hot-add and remove of SSD devices to/from a vSphere 5.5 host. With the increased adoption of SSD, having the ability to perform both orderly as well as unplanned SSD hot-add/remove operations is essential to protecting against downtime and improving host resiliency
 
Question
What is heapsize in VMFS
Answer
maximum of 256MB of heap is needed to enable vSphere hosts to access the entire address space of a 64TB VMFS.
 
Question
Do we have any e learning (documents or videos) on this Advance features of VMware vSphere 5.5 in VM site.
Answer
Yes all the documents are available to public. moreover user blogs can be read in pubs.vmware.com
 
Question
What are the I/O Controlls Available in network and Storage ?
Answer
Already answered .
 
Question
 
What are the benefits of VADP ?
 
Answer
 
VADP enables centralized, off-host LAN free backup of vSphere virtual machines, reduces ESX host resources to do backup processing, and enables flexible backup windows
 
Question
What is VMkernel port?
Answer
VMkernal Port is a Network Port for the VMware Management Traffic. It can also includes, traffic for vMOtion, Host communication traffic, FT
 
Question
What are the types of virtual Switch connections
 
Answer
 
The Virtual Switches can be Standard or Distributed .
 
Question
What is difference between FT and HA?
Answer
VMware HA : In case of a Host failure the VM is restarted on another Available host in the CLuster VMware FT: A ghost VM of a VM is created on a different Host. In case of Host failure, The Ghost VM running on other Host instantly takes over the Load. and the whole operation goes seamlessly
 
Question
What is CPU constrants for vMotion
Answer
CPU Constraints in vmotion occurs due to different generations of CPUs and can be taken care by EVC feature
 
Question
 
What is concept of private vlan in vDS
Answer
Private LANs in VDS are used to segregate the IPs based traffic in the virtual Environment.
 
Question
Can I upgrade while my virtual machines are running? from VMFS-3 to VMFS-5 ?
Answer
 
Yes it can be done on the fly
 
Question
What are the methods for making V-Center server available ?
 
Answer
One way is to protect vCenter using vSphere HA Second method is to use vCenter Heartbeat.
 
Question
What is host requirement for VMotion migration?
Answer
basic requirements are : vCenter Standard License and above, Networking Enabled for vMotion. EVC in case of Different family of CPU, Shared Storage.
 
Question
 
How to check my VMFS-5 partition information?
 
Answer
It is by default 1 MB from 5.x onwards and cannot be changed.
 
Question
What is the criteria for Storage DRS for VM Migration ?
Answer
 
Based upon the Storage datastore Latency and Storage Space availability .
 
Question
 
Do I need additional licenses to use VDP 5.1?
Answer
 
Yes it is a separate product.
 
Question
What is VDP?
Answer
VDP is VMware Data Protect
 
Question
How many concurrent V motion migration you can do on 1GBS network ?
Answer
4
 
Question
Whats the diffrence between HA working mechanism in vsphere 5.x and 4.x
Answer
in 4.x the first 5 Host were primary node involved in HA whereas in 5.x we have master slave concept
 
Question
what are the datacenter objects.
 
Answer
host, VM, Switch, Port Group, resource Pools, Cluster, datacenter, and more.
 
Question
Which all agents are involved in HA
Answer
aam Earlier and fdm I new versions.
 
Question
How to check my VMFS-5 partition information
Answer
it is 1 MB block in vsphere 5.5 and cannot be changed. same can be seen in configuration tab
 
Question
What is maximum limit for VMFS5?
Answer
 
64 TB for dataStore and 62 TB for vmdk ?
 
Question
What is VFC
Answer
Virtual Flash Read Cache allows you to locally cache virtual machine read I/O on an ESXi host and even migrate that virtual machines cache to another Virtual Flash enabled ESXi host
 
Question
 
Can I upgrade while my virtual machines are running?
 
Answer
VMs canot be upgraded online. to change the VM vrsion VM needs to be shut down
 
Question
What is the new support limit for logical CPUs in vSphere 5.5?
Answer
320 logical CPU per host 64 vCPU per VM
 
Question
 
Which feature configures VM-VM affinity and anti-affinity rules?
 
Answer
DRS Rules in CLuster settings
 
Question
What is Storage IO Control
Answer
The Advanced button allows you to modify the latency threshold figure. SIOC doesn’t do anything until this threshold is exceeded. By default the latency threshold is 30ms, but this can be changed
 
Question
What is maximum vNic Speed
Answer
It depends upon the vNIC adapted being used.
 
Question
 
How many maximum Virtual SCSI adapters per virtual machine we can use?
Answer
4
 
Question
What are the major difference between Vmware vSphere 5.0 and VMware vSphere 5.5, Also its uses
Answer
Apart from the configuration Maximums , the main adnacements are : hot pluggable PCI device, latency sensitivity, vGPU support, app HA, Big Data Plugin Prosessor c State power saving and many more.