In the course of June, you use several ECS instances of s2.xlarge.2 (4 vCPUs, 8GB RAM). One on June 10th for 2 hrs 30 mins, one on June 12th for 1 hr 30 mins, two on June 15th for 45 mins, one on June 20th for 12 hrs 15 mins.

2.5 h + 1.5 h + 2 x 0.75 h + 12.25 h = 17.75 h 17.75 hours are charged on the monthly bill.

Metering of consumption stops the moment the instance is no longer active, i.e., „stopped.“ It does not have to be deleted from the console. Use of the autoscaler does not change anything: If the autoscaler is used to start or stop instances, then this is charged as if it had been manually started.

At 10:00 a.m. on April 1, you start an ECS instance s2.xlarge.4 (4 vCPUs, 16 GB RAM) with CentOS. At 9:00 a.m. on April 5, you start a second instance of the same type. Both instances run until 12:20 p.m. on April 10 and are then stopped. The basic cost for an instance is 20.1 cents/hour.

On November 11, you use an ECS instance s2.large.1 (2 vCPUs, 2GB RAM) for 3 hrs 30 mins. On November 12, you use two such instances for 1 hr 45 mins. On November 13, you use both instances together with a General Compute instance v2 s2.large.8 (2 vCPUs, 16GB RAM) for 2 hrs 20 mins. All instances are operated with an open Linux version.

On January 28, you reserve an ECS instance s2.xlarge.8 (4 vCPUs, 2GB RAM) for 12 months. In February, you use two ECS instances of that type ordered at the same time from 8:00 a.m., February 3 to 9:20 a.m., February 17. The time which exceeds the monthly contingent of 672 hours (2 h 40 min) is charged using the elastic model.

An upgrade to a larger instance type is possible at any time. It is also possible to switch from an old generation of ECS to a newer generation or a more powerful flavor during the term, e.g., from a c3 instance to a c4 or from s2 to c3. The contract term remains the same. The time already used for the reserved package is billed to the exact day using the old cost rate (daily rate of the monthly price x days passed). The new package is valid until the originally agreed end of term and is also billed to the day. The upgrade must be ordered via the service desk.

You configure a ECS instance s2.large.4 (2 vCPUs, 8 GB RAM, SUSE Linux) in the Open Telekom Cloud and use this continuously from 8:00 a.m., May 2. Starting 9:00 a.m., May 15, you order a reserved package for this instance type that applies for 12 months with retroactive effect from midnight on May 15. At 10:00 a.m., June 1, a second instance of the same type is started to cover a spike in utilization (autoscaler). This is then stopped again after precisely 12 days. At 8:00 a.m., June 20, the first instance is started up again. At 5:00 p.m., July 29, the active instance is switched off.

In the reserved upfront mode, a fixed amount is billed at the start of the term. In contrast to the regular reserved models, it is not possible to switch to a larger instance or a new generation. In the subsequent months, the reserved upfront instances are also shown on the bill as a reserved upfront package, without being charged for. The credit balance depletes over the selected term, with the proportionate amount available each month (hours x days). The only difference from the example above is that the complete amount for 8,760 hours (365 days x 24 hours) is billed at the end of the month in which the order is placed.