Relational Database Service (RDS)

When it comes to the structured storage and use of data, databases have become virtually indispensable. Experts often use relational databases thanks to the large variety of possibilities they offer. Clouds enable databases to be used “as a service”: database software and the corresponding hardware infrastructure is packed at the push of a button and high-availability databases are provided in a matter of minutes – for tests, development or continuous operation.

Relational Database Service (RDS) is a cloud-based web service that is reliable, scalable, easy to manage, and ready for immediate use. RDS provides a comprehensive performance monitoring system, multi-level security protection measures, and a professional database management platform, allowing you to easily set up and scale a relational database. RDS supports database services such as MySQL, PostgreSQL and Microsoft SQL Server.

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On the RDS console you can perform almost all necessary tasks – no programming required. RDS offers an automatic backup function and point-in-time recovery for the previous 35 days, supports high availability even across different availability zones, and a mirrored standby database can be added to the primary database which can be expanded to up 4 TB during ongoing operation.

Recovery Point Objective: The maximum amount of data that a company can tolerate losing (Recovery Point Objective, RPO) is zero if a deployment has been selected as primary/standby. For single RDS instances, the maximum value of an RPO is set to five minutes, as an automatic incremental backup runs every five minutes. In the case of PostgreSQL, data replication between the primary/standby node is based on WAL logs.
Primary node failover: RDS has a monitoring process that detects primary node failovers. If the primary node fails, the RDS monitoring process automatically changes the role from standby node to primary node. The failed primary node is recreated and is automatically assigned the role of the standby node. This means that the RPO after a failure is zero, as the Recovery Time Objective (RTO) takes less than 60 seconds for the role change.
Automatic and manual backups: Automatic database backups run within the specified time window and can be adjusted at any time in the RDS console. Manual backups are possible at any time. After an automated daily full backup of a database is finished, an incremental backup starts automatically in the background and saves the changes of the last incremental backup every five minutes. Backups and incremental backups are saved in OBS and cannot be deleted.
Recycle Bin functionality: After deleting a database, all automatic backups are automatically deleted, while manual backups remain untouched. At the same time, RDS creates a full backup of the database, which is temporarily stored in the Recycle Bin. The full backup contains all data up to the time of deletion. The period for temporary storage in the Recycle Bin has a default value of 7 days and can be changed at any time. If a new temporary period is selected by the user, this only applies to new RDS instances and all existing instances retain the previously selected temporary period.

It is also possible to upgrade a single-instance database to an active/standby database. RDS is available directly via an Elastic IP if desired. Active Directory in Microsoft SQL Server is currently not supported in all Microsoft SQL versions.

Billing is based on the hourly price of the selected virtual machines (VMs), while additional storage space for backups and images is billed in accordance with the type used for the respective storage variant.

Reasons for RDS in the Open Telekom Cloud

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Storage Encryption

RDS uses static and tablespace encryption to encrypt the data to be stored. Encryption keys are managed by the Key Management Service (KMS).

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Elastic Scaling

RDS resources can be adjusted flexibly at any time based on your requirements, meaning you pay for only what you use. Cloud Eye can monitor the changes of database pressure and data storage space and within you can adjust DB instance classes accordingly.

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Optimized Hardware

RDS offers customers stable and high-performance database services using servers that have been proven to be robust by customer successes in a wide range of applications.

Key Features of RDS

Flexible choice of database engines

With RDS, you can choose your preferred database engine from a variety of options, including MySQL, PostgreSQL and Microsoft SQL Server. This allows you to stay flexible when setting up, operating, and scaling SQL deployments in the cloud, and means you have all of their respective advantages at your fingertips.

MySQL

RDS supports MySQL, 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, scalable, inexpensive, easy to manage, and immediately ready for use.

PostgreSQL

PostgreSQL is an open-source object-relational database management system with an emphasis on extensibility and standards compliance. It applies to business-oriented online transaction processing (OLTP) scenarios and supports NoSQL (JSON, XML, or hstore) and geographic information system (GIS) data types. The postgis plugin is supported.

Microsoft SQL Server

Microsoft SQL Server is a well-established commercial database with mature enterprise-class architecture. It supports one-stop deployment, ensuring key O&M services and lowering labor costs. It is reliable, scalable, inexpensive, easy to manage, and ready for immediate use with RDS.

RDS Versions & Flavors

Comparison between single and high availability

DB Engine	Single	Primary/Standby
MySQL	8.0 5.7 5.6	8.0 5.7 5.6
PostgreSQL	16 15 14 13 12 11	16 15 14 13 12 11
Microsoft SQL Server	2022 EE 2019 SE 2017 SE	2022 SE 2019 EE 2017 EE
Number of nodes	1	2
Specifications	vCPUs: a maximum of 60 Memory: a maximum of 512 GB Storage space: a maximum of 4 TB	vCPUs: a maximum of 60 Memory: a maximum of 512 GB Storage space: a maximum of 4 TB
Monitoring and alarms	Supported	Supported
Security group	Supported	Supported
Backups and restorations	Supported	Supported
Parameter settings	Supported	Supported
SSL	Supported	Supported
Log management	Supported	Supported
Read replicas (need to be created)	Supported	Supported
High-frequency monitoring	Supported	Supported
Primary/standby switchover or failover	Not supported	Supported
Standby DB instance migration	Not supported	Supported

Flavors

vCPU (number)	RAM	MySQL	PostgreSQL	MS SQL Server
1	2 GB
1	4 GB
2	4 GB
2	8 GB

Mapping of general-enhanced flavors with new general purpose and dedicated flavors

As two new flavors families were introduced since June 2024 in the service description as “General purpose or GP” and “Dedicated or D” we would like to deliver you a mapping table for the old flavor family (“General-enhanced”) and the new one as follow:

CPU	Memory (GB)	Engine	OLD General-enhanced (c2, s1, m1, c3, m3 und m7)	NEW General purpose or GP (n1) Dedicated or D (x1) Corresponding ECS flavor in parenthesis
1	2	MySQL/PostgreSQL	db.c2.medium	db.n1.medium.2 (s3.medium.2)
1	4	MySQL/PostgreSQL	db.s1.medium	db.n1.medium.4 (s3.medium.4)
2	4	MySQL/PostgreSQL	db.c2.large	db.n1.large.2 (s3.large.2) db.x1.large.2 (c4.large.2)
2	8	MySQL/PostgreSQL	db.s1.large	db.n1.large.4 (s3.large.4) db.x1.large.4 (c4.large.4)
2	16	MySQL/PostgreSQL	db.m1.large	db.x1.large.8 (m4.large.8)
4	8	MySQL/PostgreSQL	db.c2.xlarge	db.n1.xlarge.2 (s3.xlarge.2) db.x1.xlarge.2 (c4.xlarge.2)
4	16	MySQL/PostgreSQL	db.s1.xlarge	db.n1.xlarge.4 (s3.xlarge.4) db.x1.xlarge.4 (c4.xlarge.4)
4	32	MySQL/PostgreSQL	db.m1.xlarge	db.x1.xlarge.8 (m4.xlarge.8)
8	16	MySQL/PostgreSQL	db.c2.2xlarge	db.n1.2xlarge.2 (s3.2xlarge.2) db.x1.2xlarge.2 (c4.2xlarge.2)
8	32	MySQL/PostgreSQL	db.s1.2xlarge	db.n1.2xlarge.4 (s3.2xlarge.4) db.x1.2xlarge.4 (c4.2xlarge.4)
8	64	MySQL/PostgreSQL	db.m1.2xlarge	db.x1.2xlarge.8 (m4.2xlarge.8)
16	32	MySQL/PostgreSQL	db.c2.4xlarge	db.x1.4xlarge.2 (c4.4xlarge.2)
16	64	MySQL/PostgreSQL	db.s1.4xlarge	db.x1.4xlarge.4 (c4.4xlarge.4)
16	128	MySQL/PostgreSQL	db.m1.4xlarge	db.x1.4xlarge.8 (m4.4xlarge.8)
32	64	MySQL/PostgreSQL	db.c2.8xlarge	db.x1.8xlarge.2 (c4.8xlarge.2)
32	128	MySQL/PostgreSQL	db.s1.8xlarge	db.x1.8xlarge.4 (c4.8xlarge.4)
32	256	MySQL/PostgreSQL	db.m1.8xlarge	db.x1.8xlarge.8 (c4.8xlarge.8)
60	128	MySQL/PostgreSQL	db.c3.15xlarge.2
60	256	MySQL/PostgreSQL	db.c3.15xlarge.4
60	512	MySQL/PostgreSQL	db.m3.15xlarge.8
64	128	MySQL/PostgreSQL		db.x1.16xlarge.2 (c4.16xlarge.2)
64	256	MySQL/PostgreSQL		db.x1.16xlarge.4 (c4.16xlarge.4)
64	512	MySQL/PostgreSQL		db.x1.16xlarge.8 (m4.16xlarge.8)
96	768	PostgreSQL	db.m7.24xlarge.8	db.x1.24xlarge.8 (m7n.24xlarge.8)

Important note:

c2, s1, m1, c3, m3 & m7 flavors are related to Common I/O and UltraHigh I/O storage class and x1 & n1 are related to CloudSSD (Ultra High I/O) and ExtremeSSD accordingly.

Upgrading the minor version

Only RDS for MySQL and PostgreSQL support manual minor version upgrades to improve performance, add new functions, and fix bugs. Please visit here for more information.

Constraints

Typical Applications: Diversified Data Storage

RDS supports diversified storage extension through Distributed Cache Service (DCS) and Object Storage Service (OBS).

New Features

11/04/2024New flavor in RDS available in EU-DEView Details

11/06/2024New flavors in RDS now available for EU-DE region.View Details

11/25/2024Pgvector 0.7.0 is now available in all RDS PostgreSQLView Details

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