Amazon Keyspaces (for Apache Cassandra) Service Level Agreement for Amazon Web Services (Ningxia Region)

Last Updated: June 15, 2021

This Amazon Keyspaces (for Apache Cassandra) Service Level Agreement for Amazon Web Services (Ningxia Region) (“SLA”) is a policy governing the use of Amazon Keyspaces (for Apache Cassandra) (“Keyspaces”) under the terms of the Western Cloud Data Customer Agreement for Amazon Web Services (Ningxia Region) (the “Agreement”, available at and as updated from time to time) between Ningxia Western Cloud Data Technology Co. Ltd. (“Western Cloud Data”, “us” or “we”) and you. This SLA applies separately to each account using Keyspaces from Amazon Web Services China (Ningxia) region. Unless otherwise provided herein, this SLA is subject to the terms of the Agreement and capitalized terms will have the meaning specified in the Agreement. We reserve the right to change the terms of this SLA in accordance with the Agreement.

Service Commitment

We will use commercially reasonable efforts to make Keyspaces available with a Monthly Uptime Percentage for the Amazon Web Services China (Ningxia) region, during any monthly billing cycle, of at least 99.99% (the “Service Commitment”). In the event Keyspaces does not meet the Service Commitment, you will be eligible to receive a Service Credit as described below.

Service Credits

Service Credits are calculated as a percentage of the total charges paid by you for Keyspaces in the Amazon Web Services China (Ningxia) region for the monthly billing cycle in which the Service Commitment was not met, in accordance with the schedule below:

Monthly Uptime Percentage

Service Credit Percentage

Less than 99.99% but greater than or equal to 99.0%


Less than 99.0% but greater than or equal to 95.0%


Less than 95.0% 100%

We will apply any Service Credits only against future Keyspaces payments otherwise due from you. At our discretion, we may issue the Service Credits to the bank card you used to pay for the billing cycle in which the unavailability occurred. Service Credits will not entitle you to any refund or other payment from us. Service Credits will be applicable and issued only if the credit amount for the applicable monthly billing cycle is greater than one Renminbi (¥1 Renminbi). Service Credits may not be transferred or applied to any other account. Unless otherwise provided in the Agreement, your sole and exclusive remedy for any unavailability, non-performance, or other failure by us to provide Keyspaces is the receipt of Service Credits (if eligible) in accordance with the terms of this SLA.

Credit Request and Payment Procedures

To receive Service Credits, you will need to submit a claim by opening a case in the Amazon Web Services Support Center. To be eligible, the credit request must be received by us by the end of the second billing cycle after which the incident occurred and must include:

(i) the words “SLA Credit Request” in the subject line;

(ii) the billing cycle with respect to which you are claiming Service Credits, together with the Monthly Uptime Percentage for Amazon Web ServicesChina (Ningxia) region for the billing cycle and the specific dates, times, and Availabilities for each 5-minute interval with less than 100% Availability throughout the billing cycle; and

(iii) your Request logs that document the errors for your claimed outage (any confidential or sensitive information in these logs should be removed or replaced with asterisks).

If the Monthly Uptime Percentage of such credit request is confirmed by us and is less than the Service Commitment, then we will issue the Service Credits to you within one billing cycle following the month in which the credit request occurred. Your failure to provide the credit request and other information as required above will disqualify you from receiving Service Credits.

Keyspaces SLA Exclusions

The Service Commitment does not apply to any unavailability, suspension, or termination of Keyspaces, or any other Keyspaces performance issues: (i) that result from a suspension described in Section 6.1 of the Agreement; (ii) caused by factors outside of our reasonable control, including any force majeure event or Internet access or related problems beyond the demarcation point of Keyspaces; (iii) that result from any actions or inactions by you or any third party (e.g. scaling of provisioned capacity, misconfiguring security groups, access policies, VPC configurations or credential settings, disabling encryption keys or making the encryption keys inaccessible, etc.); (iv) that result from you not following the guidelines and best practices described in the Keyspaces Documentation; (v) that result from your equipment, software or other technology and/or third party equipment, software or other technology (other than third party equipment within our direct control); (vi) arising from our suspension or termination of your right to use Keyspaces in accordance with the Agreement; or (vii) that result from activities related to scaling up tables (collectively, the “Keyspaces SLA Exclusions”). If availability is impacted by factors other than those explicitly used in our Monthly Uptime Percentage calculation, then we may issue a Service Credit considering such factors at our discretion.


  • “Availability” is calculated for each 5-minute interval as the percentage of Requests processed by Keyspaces that do not fail with Errors and relate solely to the provisioned Keyspaces resources. If you did not make any Requests in a given 5-minute interval, that interval is assumed to be 100% available.
  • An “Error” is any Request that results in a 1xxx or 00xx error code.
  • “Monthly Uptime Percentage” for the Amazon Web Services China (Ningxia) region is calculated as the average of the Availability for all 5-minute intervals in a monthly billing cycle. Monthly Uptime Percentage measurements exclude downtime resulting directly or indirectly from any Keyspaces SLA Exclusion.
  • “Request” is a customer-initiated action of a type specifically listed as being supported by Keyspaces in the CQL Language Reference section of the Keyspaces Developer Guide
  • A “Service Credit” is a Renminbi credit, calculated as set forth above, that we may credit back to an eligible account.