Service Certificate – STACKIT Block Storage
Service Name
STACKIT Block Storage
High level service description
The STACKIT Block Storage (“Block Storage”) provides high performance storage systems to provide persistent data storage for virtual machines as disk volumes, as well as storage for snapshots. Block Storage is available for different use cases as well as in different service plans.
Key Features
- Storage provisioning for virtual machines (disk volumes) and snapshots.
- Provisioning the disk volume from an operating system image.
- Provisioning the disk volume from a snapshot.
- Long-term storage of data (e.g. application data).
- Provision in different performance classes.
Service Plans
Block Storage is offered in different availability classes, between which the customer can choose:
- Single Availability Zone (Single AZ): Fixed assignment to an Availability Zone.
- Data in a Single AZ are not mirrored across different Availability Zones.
- Metro Setup: Fixed assignment to a region, but no fixed assignment to an Availability Zone.
- Data in Metro Setup are automatically mirrored across two different Availability Zones.
Block Storage is offered in the following performance classes, regardless of the availability class selected:
| Performance class | Premium system name | Max. IOPS | Max. Throughput |
|---|---|---|---|
| Performance class 0 | storage_premium_perf0 | 120 | 25 Mbyte/s |
| Performance class 1 | storage_premium_perf1 | 500 | 50 Mbyte/s |
| Performance class 2 | storage_premium_perf2 | 1000 | 100 Mbyte/s |
| Performance class 4 | storage_premium_perf4 | 2000 | 150 Mbyte/s |
| Performance class 6 | storage_premium_perf6 | 5000 | 200 Mbyte/s |
| Performance class 8 | storage_premium_perf8 | 10000 | 250 Mbyte/s |
| Performance class 10 | storage_premium_perf10 | 15000 | 300 Mbyte/s |
| Performance class 12 | storage_premium_perf12 | 20000 | 350 Mbyte/s |
Metric
- Billing per hour or part thereof per reserved gigabyte for disk volumes and snapshots.
- For disk volumes, depending on the selected performance class, there is an additional charge per hour or part thereof. This occurs even if the disk volume is not connected to a virtual machine.
SLA Specifics
- Availability is defined as the percentage of time that the system remains operational and the data (esp. disk volumes and snapshots) in the system can be accessed. This does not include customer configurations or other customer-related characteristics for unavailability.
- Die Durability ist definiert als der prozentuale Anteil der Zeit, in der das System korrekt funktioniert und die Integrität der darin gespeicherten Daten bewahrt wird. Die Durability wird anhand der Wahrscheinlichkeit eines Datenverlusts berechnet, d. h. eines Fehlerereignisses im System, das zu einer Beschädigung der Daten oder einem dauerhaften Verlust des Datenzugriffs führen kann.
- The durability of the Block Storage is 99.9% on a calendar month average.
Backup
- Backup and recovery of block storage (both disk volumes and snapshots) are the responsibility of the customer and are not included in the service.
- The customer has the option to use the separately available Backup Storage for this purpose (see Service Level Agreement – STACKIT Backup Storage). Read accesses to create backups with the separately available Backup Storage are handled with the same performance class as the backed up volume of the Block Storage.
Additional Terms
- The creation and restoration of backups are the responsibility of the customer.