| 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 |
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| 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 |
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| 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 |
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| 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. |
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| 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 |
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| Question |
| What is new in this ? |
| Answer |
| New features have already been answered . |
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| 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 |
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| 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 |
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| 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. |
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| 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. |
