Instance
Instance refers to an elastic cloud server, which is a basic computing component composed of CPU, memory, operating system, and EVS drive.
Image
An image is a template for an elastic cloud server that contains software and necessary configurations, including at least an operating system, and can also include application software (such as database software) and private software. Using an image, you can create elastic cloud servers.
Public Image
Public images are the default images provided by the system, which are common standard operating system images visible to all users, including the operating system and pre-installed public applications. Public images are highly stable and all have legitimate licenses, so you can use them with confidence. You can also configure the application environment or related software according to your actual needs.
Private Image
Private images are images created by the user themselves. Images that include operating systems or business data, pre-installed public applications, and the user's private applications are visible only to the individual user.
EVS
EVS (Elastic Volume Service) provides highly reliable, high-performance, diverse specifications, and elastic scalable block storage services for elastic cloud servers, meeting the business needs of different scenarios, and suitable for distributed file systems, development testing, data warehouses, and high-performance computing scenarios.
Security Group
A security group is a logical grouping that provides access policies for elastic cloud servers with the same security protection needs and mutual trust. After a security group is created, users can define various access rules within the security group. Once an elastic cloud server is added to the security group, it is protected by these access rules.
Cloud-init
Cloud-init is an open-source cloud initialization program that can initialize specified custom information (Host Name, keys, and user data, etc.) in newly created elastic cloud servers.
Using Cloud-init for the initialization configuration of elastic cloud servers will affect your use of elastic cloud servers, image services, and autoscaling.
CPU Credits
CPU Credits are a method to measure the utilization of cloud server computing, storage, and network configurations. Cloud servers utilize the CPU credit mechanism to ensure the baseline performance of cloud servers, addressing the issue of over-committed cloud servers consistently occupying CPU resources.
CBR
CBR (Cloud Backup and Recovery) offers a simple and easy-to-use backup service for cloud servers and EVSs. In the event of incidents such as virus intrusion, accidental deletion, or hardware and software faults, data can be restored to any backup point.
Snapshot
Specified individual or multiple EVSs (system or data disks) can support quick backup and recovery, allowing for the rapid saving of data on EVSs at a specified time.
VPC
VPC (Virtual Private Cloud) creates a logically completely isolated, dedicated area for elastic cloud servers, where users can define a virtual network within their logically isolated area to construct a dedicated area that is completely isolated for elastic cloud servers. You can also define network features such as security groups, VPNs, IP address ranges, and bandwidth within a VPC, facilitating the management and configuration of the internal network, and enabling secure and rapid network changes. You can also customize the access rules between and within security groups for elastic cloud servers, enhancing the security protection of elastic cloud servers.
Primary Elastic NIC
When creating a cloud server instance, the elastic NIC that is created by default with the instance is called the primary elastic NIC. The primary elastic NIC cannot be unbound from the instance.
Extended Elastic NIC
Create extended elastic NICs, attach them to the cloud server instance, and also detach them from the instance if needed. The number of extended elastic NICs that can be attached to each instance is determined by the instance's specifications.
Key pair
Key pairs, also known as SSH key pairs, consist of a public key and a private key. They provide a method of authentication for users to remotely log in to cloud servers, which is a different authentication method from the traditional username and password login.
Tag
Tags are identifiers for elastic cloud servers. Adding tags to elastic cloud servers facilitates the identification and management of the cloud server resources owned by users.