When you perform certain VM management operations, such as creating a virtual disk, cloning a VM to a template, or migrating a VM, you can specify a provisioning policy for the virtual disk file.
NFS datastores with Hardware Acceleration and VMFS datastores support the following disk provisioning policies. On NFS datastores that do not support Hardware Acceleration, only thin format is available.
You...
Wednesday, July 10, 2013
Beacon probing
Beacon probing is a network failover detection mechanism that sends out and listens for beacon probes on all NICs in the team and uses this information along with link status to determine link failure. Beacon probing detects failures, such as cable pulls and physical switch power failures on the immediate...
vCenter Inventory Service
vCenter Inventory Service Stores vCenter Server application and inventory data, enabling you to search inventory objects across linked vCenter Servers. If the vCenter Inventory Service Database is corrupted or inoperable, you can reset it. You should also reset the vCenter Inventory Database if you reset the vCenter Server database.
Procedure to reset the vCenter Inventory Service database:
Stop...
N-Port ID Virtualization (NPIV)
N-Port ID Virtualization (NPIV) enables a single Fibre Channel HBA port to register several worldwide port names (WWPNs) with the fabric. Each address appears as a unique entity on the Fibre Channel fabric. Each of which can be assigned to an individual VM. When VMs do not have WWN assignments, they...
Sysprep Location on vCenter
Microsoft Sysprep tool is used to do the customization of Windows guest operating systems, Sysprep tool is useful when you clone VM or when you deploy VM(s) from the template, So to automate the customization of windows guest operating systems copy the correct version of Sysprep for each guest operating...
vSphere DPM
vSphere DPM is a cluster power management feature. vSphere DPM continuously monitors resource requirements and power consumption across a DRS cluster. When the cluster needs fewer resources, it consolidates workloads and powers off unused ESXi hosts to reduce power consumption. When resource requirements...
Memory Compression
With Memory Compression, ESXi stores pages, which would otherwise be swapped out to disk through host swapping, in a compression cache located in the main memory. Memory compression overtakes host swapping because access to the compressed page only need a page decompression, which is faster than the...
Understanding Snapshot
Understanding Snapshot
Snapshot in VMware allows you to preserver the state and data of virtual machine at the time snapshot is taken. When you want to test some new application, update and you don’t know the effect of the new installation on your current state of virtual machine take the snapshot to preserve the current state and then do the installation (changes), so even if nothing work; you...
vNetwork Load Balancing Policies
NIC Teaming
When we connect multiple physical Ethernet adapters (VMNICs) to a single virtual switch is called Teaming. A team can share the load of traffic between Physical and virtual networks among some or all of its members and provide passive failover in hardware failure or network outage.
Load...
Software FCoE Adapter
Like Software base iSCSI initiator, VMware had introduce Software FCoE in vSphere 5.0, To use software FCoE initiator, we must have a NIC that supports the FCoE offloads (Intel X520), if we have a NIC that support FCoE offloads, we can add software FCoE initiator.
Create a VMkernel port, when prompted...
How VM Access Data on a SAN storage
ESXi provides host-level storage virtualization, which abstracts the physical storage layer from VMs.
A VM uses a virtual disk to store its operating system, program files, and other data. To access virtual disks, a VM uses virtual SCSI controllers (BusLogic Parallel, LSI Logic Parallel, LSI Logic...
Storage vMotion
Storage vMotion leverages the same technology that is used for vMotion but applies to migration of virtual disk files. Storage vMotion allows VMware to implement a new patented load balancing technique for virtual machines based on storage usage and load. Storage vMotion can also be performed individual...
VMware vCenter Server Appliance (VCSA)
The VMware vCenter Server Appliance (VCSA) consists of a prepackaged 64-bit SUSE Linux Enterprise Server 11 virtual machine that hosts a VMware vCenter Server instance. By not relying on a Windows-based OS, customers can eliminate the licensing costs typically associated with running VMware vCenter...
VMX Swap Files
Virtual machine executable (VMX) swap files allow the host to greatly reduce the amount of overhead memory reserved for the VMX process.
VMX swap files are not related to the swap to host cache feature or to regular host-level swap files.
ESXi reserves memory per virtual machine for a variety of purposes. Memory for the needs of certain components, such as the virtual machine monitor (VMM) and...
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