What Are the OBS SLA and Its Constraints?

A service level agreement (SLA) documents what service quality a provider will furnish and defines the uptime guarantee (service availability) the provider is obligated to meet. The OBS SLA ensures a service availability of no less than 99.9% for OBS Standard single-AZ storage in each service period and of no less than 99.95% for OBS Standard multi-AZ storage in each service period. The SLA availability achievement strongly relies on the hardware replacement speed. If the availability is 99.95% (indicating an annual service interruption tolerance of no more than 4.38 hours), hardware replacement must be completed within 8 hours. If the availability is 99.9% (indicating an annual service interruption tolerance of no more than 8.76 hours), hardware replacement must be completed within 30 hours.

The OBS SLA does not apply to any of the following performance or availability issues:

1. Edge access failures due to network faults (such as edge node network disconnection and carrier line latency and jitter or faults), hardware faults (such as device's power supply faults, as well as hard disk, memory, and backplane faults), data center faults (such as power outages, typhoons, floods, earthquakes, and epidemics), and others.
2. Issues of devices that are deployed in a customer's data center and depend on the infrastructure and network provided by the customer.