阿里云rds服务器需不需要单独购买

RDS是关系型数据库服务（Relational Database Service）的简称，是一种即开即用、稳定可靠、可弹性伸缩的在线数据库服务。阿里云rds服务器，是指rds数据库服务器，即阿里云关系型数据库，那么阿里云rds服务器是什么？下面小编给你说说吧。

基于阿里云分布式文件系统和SSD盘存储，RDS支持MySQL、SQL Server、PostgreSQL、PPAS（Postgre Plus Advanced Server，高度兼容Oracle数据库）和MariaDB TX引擎，并且提供了容灾、备份、恢复、监控、迁移等方面的全套解决方案。

想要让云服务器ECS连接RDS数据库，必须将ECS云服务器的IP添加到RDS数据库的白名单中，这是必要条件。

使用 RDS需要单独额外购买

1、在阿里云网站RDS专区选择。有内存、存储空间、最大连接数三个参考数据，大家在买之前可以看一下自己网站大概的需求。如果是新站，可以先购买最小的型号，如果不够，日后可以随时升级。

2、购买到适合自己的套餐，付款开通之后，登陆阿里云管理控制台，就能看到你的RDS实例。

不过，RDS并非100%完美兼容mysql和mssql，尤其是存储过程和视图等高级功能，RDS使用时可能会存在一些兼容问题。

RDS对sql语句的规范性要求很高，使用时尽量规范你的语句，以免带来不必要的麻烦。

另外，RDS虽然可以内外网连接，但是外网流量收费，同时出于延时考虑，建议搭配云服务器使用，如果不在同一个机房，就别考虑使用了，连接延时。

以上是关于“阿里云rds服务器是什么”的介绍，主机参考是国内较早提供IaasS、PaaS服务的优质云服务商，其云服务器可挂载云盘，存储大数据。云盘数据实时写入三份，能够保证任何一个副本故障时快速恢复，有效避免物理安全威胁，支持随时弹性扩展，价格实惠。

RDS is the abbreviation of Relational Database Service. It is a kind of on-line database service that is ready to use, stable, reliable and elastic. Alibaba cloud RDS server refers to RDS database server, that is, Alibaba cloud relational database. What is Alibaba cloud RDS server? Let me tell you something about it.

Based on Alibaba cloud distributed file system and SSD disk storage, RDS supports mysql, SQL server, PostgreSQL, PPAs (postgre plus advanced server, highly compatible with Oracle database) and MariaDB TX engine, and provides a full range of solutions in disaster recovery, backup, recovery, monitoring, migration, etc.

If you want ECs to connect to RDS database, you must add the IP address of ECS ECs to the white list of RDS database, which is a necessary condition.

You need to purchase RDS separately

1. Select from the RDS section of alicloud website. There are three reference data: memory, storage space and the maximum number of connections. Before you buy, you can have a look at the general needs of your website. If it's a new station, you can buy the smallest model first. If it's not enough, you can upgrade it at any time in the future.

2. Purchase the package that suits you. After the payment is opened, log in to Alibaba cloud management console and you will see your RDS instance.

However, RDS is not 100% perfectly compatible with MySQL and MSSQL, especially with advanced functions such as stored procedures and views. There may be some compatibility problems when RDS is used.

RDS has a high standard for SQL statements. Try to standardize your statements when using them to avoid unnecessary troubles.

In addition, although RDS can be connected to the internal and external networks, it is recommended to use RDS with ECS for the purpose of delay. If RDS is not in the same computer room, it is not recommended to use RDS. Connection delay.

The above is an introduction to "what is alicloud RDS server". The host reference is a high-quality cloud service provider that earlier provided IAAs and PAAS services in China. Its cloud server can mount cloud disks and store big data. Three copies of cloud disk data are written in real time, which can ensure fast recovery in case of any copy failure, effectively avoid physical security threats, support flexible expansion at any time, and provide affordable price.

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