Data Center
A data center is the largest resource namespace within a
virtualization platform, including resources such as clusters, hosts, data storage,
distributed switches, and distributed port groups.
Glossary
Cluster
A logical collection of a group of hosts (compute
nodes).
Host
A host is an x86 or ARM physical server running a KVM
virtualization hypervisor, providing resources such as computing, networking, and
storage to virtual machines.
Virtual Machine Group
A logical grouping of virtual machines based on business
needs.
Virtual Machine
A virtual machine is a virtualized host running on a
physical host, capable of running an operation system and applications just like a
physical host.
Disk
A disk provides storage space for a virtual machine. Disks
are categorized into system disks and data disks.
System Disk
A system disk provides support for the system operations
of a virtual machine.
Data Disk
A data disk provides extended storage space for a virtual
machine.
Image
An image is a template file used by virtual machines or
disks. Images are categorized into system images and disk images.
Image Storage
An image storage is a virtualized resource that provides
storage space for image template files used by virtual machines or disks. An image
storage can be categorized into standalone image storage and distributed image
storage.
Standalone Image Storage
A standalone image storage stores image files through
image slices and support incremental storage.
Distributed Image Storage
A distributed image storage stores image files through
distributed block storage.
Data Storage
A data storage is a virtualized resource that provides
storage space for virtual machines and their application data. A data storage can be
categorized into local storage and network shared storage.
Local Storage
A local storage is storage resource constructed using the
physical storage space of one or more hosts.
Netowrk Shared Storage
A storage system used for remote storage of virtual
machines and their application data, accessible concurrently by hosts over a
network.
Distributed Switch
A virtual switching device that provides unified virtual
network management and monitoring for virtual machines within a
cluster.
Distributed Port Group
A logical grouping of ports on a distributed switch, used
for port configuration.
vNUMA Configuration
vNUMA uses CPU pinning to passthrough the topology of
associated host physical NUMA (pNUMA) nodes to a virtual machine, generating a
topology of virtual NUMA (vNUMA) nodes for the virtual machine. This topology
enables a vCPU on a vNUMA node to primarily access the local memory and thus
improves VM performance.
NUMA (Non-Uniform Memory Access)
Non-uniform memory access (NUMA) is a computer memory
design where the memory access time depends on the memory location relative to the
CPU. Under NUMA, a processor can access its own local memory faster than non-local
memory and thus improves VM performance.
pNUMA Node (physical NUMA Node)
A pNUMA node (physical NUMA node) is a host NUMA node
predefined based on the host NUMA architecture. It is used to manage the CPUs and
memory of the host.
pNUMA Topology (physical NUMA Topology)
A pNUMA topology (physical NUMA topology) is the topology
of the host NUMA nodes predefined by the CPU vendor based on the host NUMA
architecture.
vNUMA Node (virtual NUMA Node)
A vNUMA node (virtual NUMA node) is generated by
passing-through associated pNUMA nodes via CPU pinning. It is used to manage the
CPUs and memory of a virtual machine.
vNUMA Topology (virtual NUMA Topology)
A vNUMA topology (virtual NUMA topology) is the topology
of VM NUMA nodes generated by passing-through associated pNUMA nodes via CPU
pinning.
Local Memory
Local memory is the memory that a CPU (pCPU or vCPU)
accesses through the Uncore iMC (Integrated Memory Controller) of the same NUMA
(pNUMA or vNUMA) node. Compared with accessing non-local memory, accessing local
memory has lower latencies.
CPU Pinning
CPU pinning assigns the virtual CPUs (vCPUs) of a virtual
machine to specific physical CPUs (pCPUs) of the host, which improves VM
performance.
EmulatorPin Configuration
EmulatorPin assigns all other threads than virtual CPU
(vCPU) threads and IO threads of a virtual machine to physical CPUs (pCPUs) of the
host so that these threads run on assigned pCPUs.
Snapshot
A snapshot is a point-in-time capture of data status in a
disk.
VM Scheduling Policy
A VM scheduling policy is a resource orchestration policy
based on which virtual machines are assigned to hosts to achieve the high
performance and high availability of businesses.
Management Node
A physical host where the system is installed, providing
UI management and virtualization platform deployment capabilities.
Compute Node
Also known as a host, it is a physical server that
provides computing, networking, and storage resources for virtual
machines.
iSCSI Storage
iSCSI storage is an SAN storage that uses the iSCSI
protocol for data transmission. You can add an iSCSI SAN block as a SAN storage or
passthrough the block to a virtual machine.
FC Storage
FC storage is an SAN storage that uses the FC technology
for data transmission. You can add an FC SAN block as a SAN storage or passthrough
the block to a virtual machine.
NVMe Storage
A type of storage implemented via the NVMe-oF (NVMe over
fabrics) protocol. You can add a block device configured from an NVMe storage as SAN
storage.
Management Network
A management network is used to manage physical resources
in the platform. For example, you can create a management network to manage access
to hosts, data storage, and image storage.
Security Group
A security group provides security control services for VM
NICs. It filters the ingress or egress TCP, UDP, and ICMP packets of VM NICs based
on the specified security rules.
MN Monitoring
Management Node (MN) monitoring allows you to view the
health status of each management node when you use multiple management nodes to
achieve high availability.
Alarm
An alarm is used to monitor the status of time-series data
and events and respond to the status change. Alarms can be categorized into resource
alarm and event alarm.
Message Template
A message template specifies the text template of a
resource alarm message or event alarm message sent to an SNS system.
Endpoint
An endpoint is a method that users obtain subscribed
messages.
Alarm Message
An alarm message is a message sent the time when an alarm
is triggered.
Operation Task
An operation task is a chronological record of operations on the specified objects and their operation results.
HA Task
HA task logs generated when the platform executes high availability procedures in accordance with the enabled HA policy.
Scheduling Task
Scheduling task logs generated when the platform executes dynamic resource scheduling operations after the cluster DRS is enabled.
Event
Event monitors and records all activities on the platform.
You can use this feature to implement operation tracking, security analysis,
troubleshooting, and automatic O&M.
Backup Plan
You can create a backup plan to back up local virtual
machines or platform databases to a specified backup storage on a regular
basis.
Local Backup Data
Local backup data of virtual machines or platform
databases is stored in the local backup storage.
Local Backup Storage
A local backup storage is located at the local data center
and is used to store local backup data.
Remote Backup Storage
A remote backup storage is located at the a remote data
center and is used to store remote backup data.
Tag
A tag is used to mark resources. You can use a tag to search for and aggregate resources.
Custom Attribute
Custom attributes are user-defined key-value pairs in the platform that extend the resource tagging and management capabilities.
Single Sign-On
The Single Sign-On service supports seamless access to SSO
systems. Through the service, related users can directly log in to the platform and
manage resources.
Console Proxy
Console proxy allows you to log in to a virtual machine by
using the IP address of a proxy.
AccessKey Management
An AccessKey pair is a security credential that one party
authorizes another party to call API operations and access its resources in the
platform. AccessKey pairs shall be kept confidential.
IP Blocklist/Allowlist
An IP blocklist or allowlist identifies and filters IP
addresses that access the platform. You can create an IP allowlist or blocklist to
improve access control of the platform.
User Management
A user can be created by the admin or synchronized from an
authentication system. A user is managed by the admin. Resources created by a user
are managed by the user.
Theme and Appearance
You can customize the theme and appearance of the
platform.
Email Server
If you select Email as the endpoint of an alarm, you need
to set an email server. Then alarm messages are sent to the email
server.
Log Server
A log server receives management node logs or platform
operation logs sent from the virtualization platform for centralized retention,
search, and analysis.
System Parameters
System parameters allow you to configure settings that
take effect on the whole platform.
HA Policy
HA Policy is a mechanism that ensures sustained and stable
running of the business if virtual machine are unexpectedly stopped or are errored
because of errors occurring to compute, network, or storage resources associated
with the virtual machines. By enabling this feature, you can customize VM HA
policies to ensure your business continuity and stability.
Bare Metal Template
With bare metal templates, preconfigured files can be quickly generated to achieve unattended bulk OS installation for bare metal instances.
Bare Metal Cluster
A bare metal cluster consists of bare metal chassis.
Deployment Server
An independent server used for providing PXE services and console proxies for bare metal chassis.
Bare Metal Chassis
Bare metal chassis is used to create bare metal instances and can be universally identified by the BMC interface and IPMI configuration.
Bare Metal Instance
A virtualized instance of bare metal chassis.