olemus
käideldavus, mis vastab
kontekstist sõltuvatele kõrgematele nõuetele
= the level of availability ensuring an agreed level of operational performance, usually uptime, for a higher than normal period

ülevaateid
http://www.developermarch.com/developersummit/2017/report/downloadPDF/GIDS17_AmitSharma_Nobroker.pdf

https://www.freecodecamp.org/news/high-availability-concepts-and-theory/

https://en.wikipedia.org/wiki/High_availability

https://en.wikipedia.org/wiki/High-availability_cluster

https://www.getfilecloud.com/blog/an-introduction-to-high-availability-architecture/

https://severalnines.com/database-blog/introduction-database-high-availability-mysql-mariadb

https://support.industry.siemens.com/cs/attachments/109754977/ps7red_b_en-US.pdf?download=true

https://access.redhat.com/documentation/en-us/red_hat_enterprise_linux/8/pdf/configuring_and_managing_high_availability_clusters/Red_Hat_Enterprise_Linux-8-Configuring_and_managing_high_availability_clusters-en-US.pdf

BSI High Availability Compendium
https://www.bsi.bund.de/EN/Themen/Unternehmen-und-Organisationen/Informationen-und-Empfehlungen/Empfehlungen-nach-Angriffszielen/Hochverfuegbarkeit/HVKompendium/hvkompendium.html

https://www.bsi.bund.de/EN/Themen/Unternehmen-und-Organisationen/Informationen-und-Empfehlungen/Empfehlungen-nach-Angriffszielen/Hochverfuegbarkeit/hochverfuegbarkeit_node.html