Elastic Cloud Server (ECS)

With the help of virtual machines (VM) from the cloud, you can book server capacities quickly and flexibly via the Internet. We have combined our broad portfolio of VM variants – so-called flavors – for you in our Elastic Cloud Server portfolio. You determine specifications such as the desired operating system or service duration. Since hardware components such as RAM and CPUs are emulated virtually, you can combine them freely according to your wishes. The result are flavors that are perfectly tailored to your needs. The Open Telekom Cloud uses KVM as a hypervisor to provide virtual machines in a total of nine performance classes via the ECS offering. These cover all possible use cases, such as graphics calculations, virtual workplace systems and Big Data functions.

Reasons for ECS in the Open Telekom Cloud

Data protection

Our service is operated in the EU under European management and is GDPR-compliant. Non-European authorities have no access.

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Highest performance

Independent analysts confirm that the ECS of the Open Telekom Cloud provided the best price-performance ratio among comparable providers.

Flexibility

Our services can be tailored to your exact needs – so you never overpay. You can book additional resources as needed and they will be ready in minutes.

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Key Features of ECS

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High Quality

Reliability: Our Service Level Agreements (SLAs) guarantee 99.95% availability of the ECS service. The ability to run VMs in multiple spatially separated Availability Zones (AZs) makes it easy to minimize outages.
Efficient networks: Our ECS offer relies on the quality-of-service principle: by allocating resources dynamically and prioritized, it optimizes communication in the network, provides reliable performance and uses bandwidth efficiently.
Security: In the event of a failure of the physical server on which the virtual ECS instance is located, the system automatically restores the affected workload.

ECS Statistics

2 regions
6 availability zones (AZs)
7 flavor groups
13 operating systems

Cloud Service Integration

ECS provides high integration with other services to provide computing, storage, and network resources. Linked services include VPS, IMS, AS, EVS, VBS, CSBS, Cloud Eye, KMS, Anti DDos, Firewall and many more services to meet business needs in a cloud.

Transparency

We use OpenStack as our software basis. This open-source solution is further developed by a dedicated community that subjects the code to a rigorous public review before each release to rule out errors and security gaps.

Flexible Billing

ECS includes three pricing models: Elastic (hourly billing), Reserved (discounted monthly pricing for continuous use), and Reserved Upfront (increased discounts through prepayment). The license costs for the operating system are already included.

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BYOL

Bring your own license (BYOL) allows you to use your existing operating system license. This means you do not have to apply for a new one. With the BYOL license type, you can thus significantly reduce your costs when booking the ECS.

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ECS Flavors Overview

General Purpose

This ECS flavor provides a balanced level of compute, storage, and network capacity, and the ability to quickly add additional resources during peak loads.

Scenarios:

Applications
The general-purpose ECS s2 and s3 are suitable for applications that have no special requirements in terms of CPU performance, memory space, hard disk capacity or bandwidth, but demand high standards of security and reliability. They require low initial investment and maintenance costs.
Application scenarios
Application scenarios include corporate websites, office environments, corporate R&D and testing activities, web servers, and small databases.

Flavor	s2 \| s3
vCPU/Memory Ratio	1:1 \| 1:2 \| 1:4 \| 1:8
vCPUs	1 - 32
Memory	1 - 256GB
Maximum Intranet Bandwidth	8Gbit/s
Hardware	Intel® Xeon® Skylake 6161 Intel® Xeon® Cascade Lake 6278

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Dedicated General Purpose

This flavor uses scalable processors with high-speed intelligent network adapters. It is optimized for powerful and stable computing performance and network bandwidth with high PPS (packets per second) count.

Scenarios:

C4 ECSs
Websites and web applications, general databases and cache servers, and medium and large enterprise applications with stringent compute and network performance requirements.
C3 ECSs
Small and medium-sized databases, cache servers and search clusters with high stability requirements, also enterprise applications of different types and sizes.

Flavor	c3 \| c4
vCPU/memory ratio	1:2 \| 1:4
vCPUs	2 - 64
Memory	4 - 256GB
Maximum Intranet bandwidth	40Gbit/s
Hardware	Intel® Xeon® Skylake 6151 Intel® Xeon® Cascade Lake 6266

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Memory-Optimized

Memory-optimized ECS use processors optimized for high and stable computing performance. They offer a maximum memory size of 512 GB based on DDR4 for memory-intensive applications with high demands on network bandwidth and data throughput in Packets per Second (PPS).

Scenarios:

High-performance relational databases (e.g., MySQL) and NoSQL databases (e.g., MongoDB or Cassandra).
Distributed web-based caches used to improve the performance of dynamic websites with database connections (e.g., Memcached or Redis).
Applications for processing big unstructured data in real time (e.g., financial services or Hadoop/Spark clusters).
High performance computing (HPC) and electronic design automation (EDA).

Flavor	m3 \| m4
vCPU/memory ratio	1:8
vCPUs	2 - 64
Memory	16 - 512GB
Maximum Intranet Bandwidth	40Gbit/s
Hardware	Intel® Xeon® Gold 6161, 5118, 6151, 6266 Intel® Cascade Lake 6278

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Large Memory

This flavor provides an even larger amount of memory than Memory-optimized ECS. It is used for applications that process large amounts of data and require low latency.

Scenarios:

OLAP (online analytical processing) systems to perform multidimensional analysis at high speed, OLTP (online transactional processing) applications with active hyper-threading to execute a large number of database transactions in real time, SAP HANA applications (including Business Suite S/4HANA, Business Suite on HANA, and Business Warehouse on HANA), and Big Data solutions (for example, Apache Spark).

Flavor	e3
vCPU/memory ratio	1:12 \| 1:14
vCPUs	28 - 208
Memory	348 - 2932GB
Maximum Intranet bandwidth	40Gbit/s
Hardware	Intel® Xeon® Skylake 6151 Intel® Xeon® Skylake 8176

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Disk-Intensive

This flavor is designed for applications that require sequential reading and writing to very large data sets in local disks (e.g., distributed Hadoop computing), as well as large-scale parallel data processing and log processing.

Scenarios:

Applications
Disk-intensive ECS are suitable for applications that need to process large amounts of data requiring high IOPS (Input/Output operations Per Second) performance.
Application scenarios
Potential applications include Big Data computing, network file systems, data processing, MapReduce, Hadoop, and other data-intensive computing scenarios.

Flavor	d2
vCPU/memory ratio	1:8 \| 1:9
vCPUs	4 - 60
Memory	32 - 540GB
Maximum Intranet bandwidth	17Gbit/s
Hardware	Intel® Xeon® Gold 6151
Disk capacity	1800GB Maximum no. of disks: 60 Maximum throughput: 230MB/s Access latency: Millisecond-level

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GPU Accelerated

The virtual machines of this flavor are equipped with graphics processors that are perfectly suited for floating point calculations. Therefore, they are especially useful for applications that require a very large number of simultaneous calculations.

Scenarios:

G series
The virtual machines of this flavor are equipped with graphics processors that are perfectly suited for floating point calculations. Therefore, they are especially useful for applications that require a very large number of simultaneous calculations.
P series
Computing-accelerated or inference-accelerated ECSs, which are suitable for deep learning, scientific computing, and CAE.

Flavor	p2v \| g6 \| pi2 \|p3\|g7
GPUs	Nvidia V100, T4, A100, A40
vCPU/memory ratio	1:2 \| 1:4 \| 1:7 \| 1:8
vCPUs	8 - 80
Memory	32 - 768 GB
Maximum intranet bandwidth	30Gbit/s
Hardware	Intel® Xeon® Cascade Lake 6266 Intel® Xeon® Skylake-SP Gold 6151 v5 Intel® Xeon® Skylake 6151 3.0 GHz Intel® Xeon® Skylake-SP Xeon Gold 6278C v5 Intel® Xeon® Cascade Lake 6278 2.6 GHz

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Ultra-High I/O

Ultra-High I/O ECS use local high performance NVMe SSd to achieve high input/output performance (IOPS) with low read/write latency,

Scenarios:

High-performance databases, NoSql databases like Cassandra and MongoDB.
Efficient reading (data ingest) of enormous amounts of data

Flavor	i3
vCPU/memory ratio	1:4 \|1:8
vCPUs	8 - 64
Memory	32 - 512 GB
Maximum intranet bandwidth	70 Gbit/s
Hardware	Intel® Xeon® Ice lake 6278C

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Use Case: Scalable Internet Service

Requirements:

Simple configuration for CPU, memory, and disk space
Moderate bandwidth
Strong security and reliability
Minimal initial investment and maintenance costs

Example Scenarios:

Official websites | Website R&D and testing | Small-scale databases

Solution:

Use general computing ECSs, which provide a balance of computing, memory, and network resources. This ECS type is ideal for light- and medium-load applications.

Graphical representation scenarios scalable internet service

New Features

03/12/2025Virtualized NVIDIA A40 Compute Flavors g7v available in EU-DEView Details

03/12/2025New ECS entry-level m4.medium availableView Details

04/15/2025ECS Generation 7 landed in EU-NLView Details

Don't want to miss any updates?Visit our portfolio roadmap and discover new services and updates.
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Book now and claim starting credit of EUR 250* (code: 4UOTC250)

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We will answer any questions you have regarding testing, booking and usage – free and tailored to your needs. Try it out today!

Hotline: 24 hours a day, seven days a week

0800 3304477from Germany

+800 33044770from abroad

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* Voucher can be redeemed until December 31, 2025. Please contact us when using the voucher for booking. The discount is only valid for customers with a billing address in Germany and expires two months after conclusion of the contract. The credit is deducted according to the valid list prices as per the service description. Payment of the credit in cash is excluded.

Elastic Cloud Server (ECS)

Reasons for ECS in the Open Telekom Cloud

Data protection

Highest performance

Flexibility

Key Features of ECS

High Quality

ECS Statistics

Cloud Service Integration

Transparency

Flexible Billing

BYOL

ECS Flavors Overview

Use Case: Scalable Internet Service

Requirements:

Example Scenarios:

Solution:

Find out more

Pricing overview

Documentation

Tutorials

Book now and claim starting credit of EUR 250* (code: 4UOTC250)

Take advantage of our consulting services!Our experts will be happy to help you.

Take advantage of our consulting services!
Our experts will be happy to help you.