Abbreviations used in VMware world

Abbreviation Explanation
ADDC Active Directory Domain Controller
ALUA Asymmetric Logical Unit Access
APA Application Performance Acceleration
APD All Paths Down
ARP Address Resolution Protocol
AWS Amazon Web Services
BC Business Continuity
BCP Business Continuity Plan
BIA Business Impact Analysis
BPDU Bridge Protocol Data Unit
CAAS Cloud As A Service
CBT Changed Block Tracking, (CBT) is a VMware feature that helps perform incremental backups. VMware Data Recovery uses this technology and so can developers of backup and recovery software.
CDP Cisco Discovery Protocol
Clients VMware host client - https://host ip or fqdn/ui vSphere web client = vcenter - https://vcenterserver-fqdn/vsphere-client vSphere client = vcenter - https://vcenterserver-fqdn/ui vCSA Appliance Management UI = vcenter - https://vcenterserver-fqdn:5480
CNA Converged Network Adapter
DCB Data Center Bridging
DCUI Direct Console User Interface, littlerly on the server, host via a browser connection.
DPM Distributed Power Management. Handy URL:
DRS Direct Resource Scheduling = to balance workloads accross hosts
DSCP The Layer 3 Differentiated Services Code Point (DSCP) detects packets based on their DSCP values. CoS is always applied to the data packet irrespective of the trusted mode.NSX-T trusts the DSCP setting applied by a virtual machine or modifying and setting the DSCP value at the logical switch level. In each case, the DSCP value is propagated to the outer IP header of encapsulated frames. This enables the external physical network to prioritize the traffic based on the DSCP setting on the external header. When DSCP is in the trusted mode, the DSCP value is copied from the inner header. When in the untrusted mode, the DSCP value is not preserved for the inner header.
ELM Enhanced Linked Mode
EVC Enhanced vMotion Compatebility. Technique to use vMotion over different CPU's from same vendor, like Intel or AMD.
requirements on the host in BIOS:
- hardware virtualization support
- AMD = no execute NX and for Intel Execute Disable XD
EEV Enhanced vMotion Compatibility
EUI Extended Uniform Identifier, you can compare this with the IQN in iSCSI.
FastLZ is the compression algorithm used in vSphere Replication to compress data at the source.
FCIP Fibre Channel tunneling in an IP Protocol.
More info:,_iSCSI,_NFS_in_vCenter_6)
FDE Full Disk Encryption
FDM Fault Domain Manager. Agent installed and used for HA. Special logfile in /var/log/fdm.log
FT Fault Tolerant, way to improve availability for critical VM's. Protected VM is Primary VM there is a duplicate secondary VM. Two identical VM's running on separate hosts. EVC must be enabled. Enable FT on VM level. For licenses there is: 2 vCPU's may run on standard and enterprise. 4vCPU's needs enterprice plus !!
GPT Guid Partition Table
HA High Availability, provides business continuity. Protects ESXi hosts failures and always need a cluster!!
HCI Hyper Converged Infrastructure
HCL Hardware Compatibility List
HLM Hybrid Linked Mode = for vCenter server in the cloud
IEEE802.3AD Link Aggregation. Allows users to use more than one connection between network devices. It combines multiple physical connections into one logical connection when physical uplinks are teamed this is called Link Aggregation.
IFCP Internet Fibre Channel Protocol.   More info:
IQN ISCSI Qualified Name. iSCSI Naming Conventions. iSCSI uses a special unique name to identify an iSCSI node, either target or initiator. This name is similar to the WorldWide Name (WWN) associated with Fibre Channel devices and is used as a way to universally identify the node. iSCSI names are formatted in two different ways. The most common is the IQN format. For more details on iSCSI naming requirements and string profiles, see RFC 3721 and RFC 3722 on the IETF Web site. iSCSI Qualified Name (IQN) Format. The IQN format takes the form iqn.yyyy-mm.naming-authority:unique name, where:
KMIP Key Management Interoperability Protocol
LACP Link Aggregation Control Protocol. With this option in vDS you can bind two ports.
LAG Link Aggregation Groups
LFB/SFB Large File Block 512mb Small file block 1mb
LLDP Link Layer Discovery Protocol
LRO Large Receive Offload
MPLS Multi Protocol Label Switching
MPP Multi Pathing Plugin
MSCS MicroSoft Cluster Services. Nice doc:
MTU Maximum Transmission Unit.  Change the size of the maximum transmission unit (MTU) on a vSphere Standard Switch to improve the networking efficiency by increasing the amount of payload data transmitted with a single packet, that is, enabling jumbo frames.
Procedure:  1. In the vSphere Web Client, navigate to the host. 2. On the Manage tab, click Networking, and select Virtual switches.
3. Select a standard switch from the table and click Edit settings. 4. Change the MTU (bytes) value for the standard switch.
You can enable jumbo frames by setting MTU (bytes) to a number greater than 1500. You cannot set an MTU size greater than 9000 bytes.
5. Click OK.
NBD Network Block Device
NBDSSL Network Block Device Secure Socket Layer
NFV Network Functions Virtualization
NIOC Network I/O Control
NMP Native Multi Pathing
NPAR Network PARtition.
NTP Network Time Protocol.
More than 5 minutes difference results in Kerberos ticket errors !!
Setup NTP > manage > system > Time&date > edit settings > Use NTP enable NTP client > choose external NTP or DC. DC = FQDN > click save.
select start service.
NUMA Non Uniform Memory Access
NVM Non-Volatile Memory
NVMe Non-Volatile Memory Express adapter. NVMe is an open standard developed to allow modern SSDs to operate at the read/write speeds their flash memory is capable of. Essentially, it allows flash memory to operate as an SSD directly through the PCIe interface rather than going through SATA and being limited by the slower SATA speeds.
OVA Open Virtual Appliance, all files are packet in one file
OVF Open Virtual Format, set of files.
PDL Permanent Device Loss
PIV Personal Identity Verification
POD Point of Delivery. Small set of common building blocks called pods. In the Software-Defined Data Center (SDDC) there are several types of workloads. There are workloads needed to instantiate and support the underlying SDDC infrastructure itself. For example, in order to create and manage VMs, I first need to have a Platform Service Controller, a vCenter Server, and one or more ESXi hosts. Before I can create logical switches and transport zones, I need to have an NSX Manager and three NSX Controllers. You get the idea. The SDDC is built on-top of an infrastructure which includes a number of VMs and services that are needed to instantiate that infrastructure. In the VMware Validated Design these SDDC “infrastructure” components are referred to as “management” components, and we have a special place in the SDDC where we run these components – this place is called the Management POD. Each validated design starts with these three basic PODs – the Management POD, the Edge POD and one or more Compute PODs. These PODs interconnect to instantiate the SDDC. Things like redundancy, availability, scalability, load balancing, etc. are all designed at the POD level. As your business grows, you simply add additional PODs in order to scale out the SDDC.
PSA Pluggable Storage Architecture
PSC Platform Service Controller
PSP Path Selection Plugin
PVSCSI Para Virtual Small Computer Systems Interface
PXE Preboot Execution Environment
RAC Oracle real Application Clusters
RARP Reverse Address Resolution Protocol
RDM Raw Device Mapping
ROBO Remote Office and Branch Offices
RPO Recovery Point Objective. This is the point in time to which systems must be recoverd after an outage because of data loss.
RTO Recovery Time Objective. How long it takes to recover. Run time, time it take to recover.
RVC Ruby vSphere Console. You can download the Ruby From
How to install and use Ruby, use this URL:
SATP Storage Array Type Plugin
SDDC Storage Defined Data Center
SDRS Storage Distributed Resource Schedular
SED Self Encrypting Drives
SFB/LFB Small file block 1mb - Large File Block 512mb
SIOC Storage IO Control. Controls contention on datastores. This feature requires enterprise plus license. To configure the settings goto settings of VM > shares. Default = 1000 = normal. High=200, Low=500. To take a look to IO's in a datastore, goto datastore > tab=monitor > performance > view=performance > time=real time.
SKU Stock Keeping Unit
SMB Small or Midsized Business
SME Small or Midsized Enterprise
SPBM Storage Policy Based Management..
Used in vSAN. Can be bought of as the next generation of VMware's storage profile feature that was introduced with vSphere 5.0.
Split-RX feature to improve network performance for multicast workload. Uses multiple physical CPU's to process network packets received in a single network queue.
SRM Site Recovery Manager
SSH Secure SHell.
enable or disable SSH from DCUI console
SSPI Security Support Provider Interface
TCO TCP Checksum Offloading
TPS Transparent Page Sharing. Memory being used by the VM's, TPS makes a hash of every 4kb memory used. When it is double, one will be cleaned up for reuse.
TSO TCP Segmentation Offload
UEFI Unified Extensible Firmware Interface
UI User Interface
VAAI vStorgae API's for Array Integration
VAIO vSphere API's for IO filtering
VAMI vCenter Appliance Management Interface
vAPPS vSphere Application, logical container with VM's in a cluster to control boot order, reservation, limits and shares. From cluster > create new vApp.
VASA vSphere Storage API's for Storage Awareness
vCAN vCloud Air Network
vCD vCloud Director
VCDX VMware Certified Design Expert
VCH Virtual Container Host. Is vSphere resource pool + Docker API
VCHA VMware vCenter High Availability
vCSA vCenter Server Appliance. Centralizes the management of ESX hosts
VDI Virtual Desktop Infrastructure
VDS vSphere Ditributed Switch
VDP vSphere Data Protection
VDS vSphere Distributed Switch. Centrally managed portgroup, policies. Needs extra license !!
VECS vSphere Endpoint Certificate Store
VIB vSphere Installation Bundle
VIC vSphere Integraded Containers
VIO Vmware Integraded Openstack, connector for Openstack
vMA vSphere Management Assistant, free to use appliance
VMC VMware Cloud
VMCA VMware Certificate Authority
VMCP Virtual Machine Component Protection. Protects storage failures or other issues.
VMDK Virtual Machine DisK
VMFS Virtual Machine File System
VMSC vSphere Metro Storage Cluster = Streched cluster
vNUMA vSphere Non Uniform Memory Access
VOMA vSphere On disk Metadata Analyzer. Chekcs VMFS for metadata inconsistency.
VR vSphere Replication
vRA vRealize Automation
VSA Virtual Storage Appliance.  Are deployed as a VM on top of a hypervisor.
vSAN Virtual SAN, Storage Area Network. Already included in vCenter, only license is needed and a clustered environment. Then create an kernel adapter for this network. For vSan you need 2 disks, one for caching disk and one capacity disk. For a cluster you need 3 hosts, one primary, one secondary and a witness.
vSan is an object based storage system. Maximum of 64 hosts in a vSan cluster.
vSAN enables you to get policies on a per virtual disk or per VM basis.
vSAN is configured and monitored via the vSphere web client or CLI. vSAN needs a dedicated network port for vSAN-VMkernel interface.
Diskgroup = 1 ssd + 1 till 7 HDD's for data. Max of 5 disk groups per host.
vSAN streched cluster, introduced in vSAN 6. This feature allows VM components to be deployed across sites in different Data Centers.
Install: > first create a VSS and select vSAN traffic as VM kernel port. Or vDS > create new port group > provide a name > set the charactistics > static binding, elastic 8!! > vmkernel > vSAN traffic.
Disk group allows an admin to define a failure domain.
vSAN LSOM vSAN local log Structured Object Manager
VSS vSphere Standard Switch = vSwitch
VVD VMware Validated Designs
VVOL Vmware virtual VOLumes.
create a VVOL on an existing VVOL container, use the storage button to select the VVOL.
VUM vSphere Update Manager. From version 6.5, integraded in vCSA
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