Function Overview

MySQL is one of the world's most popular open-source relational databases. It works with the Linux, Apache, and Perl/PHP/Python (LAMP) model to provide efficient web solutions. RDS for MySQL is reliable, secure, scalable, inexpensive, easy to manage, and immediately ready for use.

• It uses a stable architecture and supports various web applications. In addition, it is cost-effective and is preferred by small- and medium-sized enterprises.
• A web-based console is available for you to monitor comprehensive information, making operations easy and visual.
• Resources can be flexibly scaled and you pay for only what you use.

PostgreSQL is an open source object-relational database management system focused on extensibility and standards compliance. It is known as the most advanced open source database. RDS for PostgreSQL is designed for enterprise-oriented OLTP scenarios and supports NoSQL (JSON, XML, or hstore) and GIS data types. It has earned a reputation for reliability and data integrity, and is suitable for websites, location-based applications, and complex data object processing.

• RDS for PostgreSQL supports the postgis plugin and provides excellent spatial performance.
• RDS for PostgreSQL is a cost-effective solution for a range of different scenarios. You can flexibly scale resources as needed and you only pay for what you use.

MariaDB was founded by Monty, the founder of MySQL, and is one of the most popular open-source databases.

RDS for MariaDB is highly compatible with MySQL. As a powerful, high-performance, secure, and reliable database management system, it is suitable for various applications. RDS for MariaDB has the following advantages:

• It allows you to easily migrate your databases to the cloud without refactoring existing applications.
• A web-based console provides comprehensive visualized monitoring for easier operations
• You can flexibly scale resources to meet business needs and pay for only what you use.

RDS offers various migration methods:

For MySQL instances:

• Migrate data using DRS
• Migrate data using mysqldump

For PostgreSQL instances:

• Migrate data using DRS
• Migrate data using psql

Among these migration methods, DRS is recommended because it is stable, efficient, easy to use, and simplifies the complexity of data transmission and reduces the transmission costs.

You can reset the password of your database account when using RDS. If an exception occurs on the root account, for example, the root account is lost or deleted, you can reset the root password to restore the account rights.

You can bind an EIP to the DB instance for public accessibility and can also unbind the EIP from the DB instance as needed.

• You can bind an EIP to a primary DB instance or a read replica only.
• If a DB instance has already been bound with an EIP, you must unbind the EIP from the DB instance first before binding a new EIP to it.
  

In read-intensive scenarios, a single DB instance may be unable to handle the read pressure and service performance may be affected. To offload read pressure on the database, you can create read replicas in a region. These read replicas can process a large number of read requests and increase application throughput.

You can scale up storage space if it is no longer sufficient for your requirements. If the DB instance status is Storage full and data cannot be written to databases, you need to scale up storage space. The DB instance needs to preserve at least 15% of its capacity to work properly. The new minimum storage space required to make this instance available has been automatically calculated for you.

Services are not interrupted during storage scaling up. You can scale up storage space of DB instances but cannot change the storage type.

You can change the DB instance class of a DB instance as required. If the status of a DB instance changes from Changing instance class to Available, the change is successful.

RDS supports the following restoration methods:

• Instance-level restoration: Automated or manual backups can be used to restore the entire DB instance.
• Database table-level restoration: Automated backup files can be used to restore database tables to a specified time point.
• Local restoration: Local backup files can be used for local storage backup or data restoration.

You can use database parameter templates to manage DB engine configurations. A database parameter template acts as a container for engine configuration values that can be applied to one or more DB instances.

When creating a DB instance, you can use a default parameter template or create a custom template. After the DB instance is created, you can change the applied parameter template.

• Default parameter template

      DB engine defaults and database system defaults are included in default parameter templates.

• Custom parameter template

      If you want to use your custom parameter settings, you can create a parameter template and apply it with your DB instance.

Read/write splitting enables read and write requests to be automatically routed through a read/write splitting address. You can enable read/write splitting after read replicas are created. Write requests are automatically routed to the primary DB instance and read requests are routed to read replicas or the primary DB instance by user-defined weights.

DBA Assistant provides you with a range of database O&M functions, making it easy to diagnose database problems, locate faults, analyze and optimize database performance. The functions include Dashboard, Sessions, Performance, Storage Analysis, Locks & Transactions, Slow Query Log, SQL Explorer, Concurrency Control, Auto Flow Control, and Daily Reports.

RDS for MySQL instances

• Error logs contain logs generated during the database running. They can help you analyze database problems.
• Slow query logs record statements that exceed long_query_time (1s by default). You can view log details and statistics to identify statements that are executing slowly and need to be optimized.
• Failover/switchover logs help you evaluate the impact of primary/standby switchovers on your workloads.
• SQL Audit records all SQL operations in log files for download and query.

RDS for PostgreSQL instances

• Error logs contain logs generated during the database running. They can help you analyze database problems.
• Slow query logs record statements that exceed log_min_duration_statement. You can view log details and statistics to identify statements that are executing slowly and need to be optimized.
  

RDS supports v3 APIs. You can invoke RDS APIs to perform a range of operations, such as DB instance creation and deletion, backup and restoration, and parameter query and modifications.

With RDS SDKs, you can easily invoke RDS APIs to create applications on HUAWEI CLOUD. Currently, SDKs support Java, Python, and Go languages.