Where a high availability requirement exists for online services, the services are architected to automatically transition between availability zones.
Topic
Availability planning and monitoring for online services
Applicable to
all
History
Dec 2021
Where a high availability requirement exists for online services, the services are architected to automatically transition between availability zones.
Miscellaneous changes were made to rationale and security controls throughout the publication. This included:
• A review from the Using the Information Security Manual chapter through to the Guidelines for Media chapter.
• Security controls suitable for all audiences have been identified with the ‘All’ applicability marking while additional security controls suitable for just government audiences have been identified with the O, P, S and TS applicability markings.
• Security controls suitable for specific classifications have been amended to include their classification(s) in the wording of the security controls to reduce the reliance on applicability markings to confer suitability.
• Tables in security controls have been converted into prose to allow for inclusion in the SSP annex template and the XML list of security controls.
• The use of ‘official’ and ‘highly classified’ terminology has been replaced with specific classifications to remove ambiguity.
• Security controls relating to high assurance ICT equipment have had their applicability narrowed to ‘S, TS’ reflecting that they are intended for the protection of SECRET and TOP SECRET systems and data.
Jul 2020
Where a high availability requirement exists, online services are architected to automatically transition between availability zones.
Security control 1580 was introduced to ensure the automatic transition between availability zones for online services that have a high availability requirement.