Key Concepts
The SurferCloud cloud database MySQL product primarily uses the following terminology. For ease of use, the following explanations are provided:
Instance Types
MySQL instances include ordinary and high-availability instance types.
The ordinary instance provides a basic single-instance database. The ordinary NVMe model MySQL instance provides a single database node whose data storage is based on elastic block storage devices of a distributed storage architecture, where computing is separate from storage.
The high-availability instance employs a dual-primary hot backup architecture, fully addressing database unavailability due to downtime or hardware failures. It supports NVMe and SSD models, high availability deployment across availability zones, and achieving disaster recovery at the machine room level.
Versions
Current MySQL instances support MySQL5.5, MySQL5.6, MySQL5.7, MySQL8.0, Percona 5.5, Percona5.6, and Percona 5.7, etc. Users can choose the cloud database version according to their needs.
Database Models
Current MySQL instances provide the NVMe model and SSD cloud disk model.
The NVMe model applies well to various business scenarios. It employs super-high-performance RDMA NVMe SSD cloud disks, supports large capacity storage (32T), and has a high cost-performance ratio.
The SSD cloud disk model is deployed in the availability zone where the NVMe model is not available and can meet most business scenarios. The underlying storage uses SSD cloud disks, which can effectively ensure data security.
Memory
The size of the memory of the cloud database. Users can choose according to the hardware requirements of the cloud database.
Disk
The size of the disk of the cloud database. Users can choose according to the hardware requirements of the cloud database.
Payment Method
Payment methods include yearly, monthly, and on-demand, all of which are prepaid by paying the corresponding service cycle fees in advance.
For detailed billing explanation, refer to the "Purchase and Billing" document.
Quantity
The quantity of the cloud databases that users need to apply for. The default is one, but multi-unit batch creation is also available.
Primary and Secondary Databases
The primary database supports both read and write operations.
Secondary databases can serve as disaster recovery nodes for the primary database and also support read operations, reducing the load on the primary database to achieve read-write separation.
Configuration Files
The configuration files include various configuration parameters for running the cloud database. Users can customize and modify them as needed. Different cloud database versions provide corresponding default configuration files.
Configuration files include default configuration files and custom configuration files. Custom configuration files are created and imported by the user.
Administrator
Super administrator (root) privileges are provided by default. User-defined administrator passwords are allowed.
Instance Name
Users can customize the name of the cloud database instance.
Resource ID
After the user creates a cloud database instance, the system automatically generates a Resource ID, which is globally unique.
IP and Port
The IP is the intranet address used by users to access the cloud database. It is automatically generated when the cloud database is created, and no public IP address is currently provided.
The default ports for MySQL and Percona are 3306.
Backup
Backups store all data of the cloud database at a specific time point. The cloud database provides automatic and manual backup methods to prevent data loss and avoid the risks brought about by incorrect operations. The backup source can be selected as the primary or secondary database, but backup from a secondary database from a different availability zone is currently not supported.
Logs
Logs are record files used to document cloud database operation events. These include binary logs, slow query logs, error logs, and operation logs.
Cloud Database UDB Service Level Agreement (SLA)
The Ucloud UDB Service Level Agreement (SLA) stipulates the general service level indicators and service matters of Ucloud's provision of the Ucloud UDB cloud database services to customers. For details of the agreement, click Cloud Database UDB Service Level Agreement (SLA) to view.
