Study azure

Study Guide: Azure Administrator
AZ-104 Study Guide: Azure Administrator

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“Pluralsight” MS Azure Master Class
https://www.youtube.com/playlist?list=PLlVtbbG169nGccbp8VSpAozu3w9xSQJoY

cloud =
- IT als interactie met een service
- een extra mgt (laag) bovenop klassieke IT
- een set of services, multi tenet <> geen rack of servers in een DC
- hoeft niet perse publiek te zijn , kan ook privaat , maar typisch benaderd (serviec gebruik) over internet

er bestaan hybrid cloud : on prem + cloud

many definitions of cloud
def US NIST : 5 critical charateristics :
- on demand self services
- broad network access
- resource pooling
- ==rapid elastiticy== (made possible by resource pooling)
- mesaured service

service = eat pizza as a service
- pizza made at home
- take elsewhere & bake at home
- pizza delivered @ home
- pizza in resto
cfr :
- on prem
- iaas : vm in the cloud
- containers (kubernetes) = pass ? or eerder paas met enkle iaas trekken ?
- paas : care about the app , not about os [ azure was started as paas]
- saas : bijvb. O365 , a servie met some config options

start with saas => pass > iaas
how quickly can i provide/ focus on buisness value

when to use cloud
it depends :
sometimes no expertise ; stuff like AI learning
but you want to keep DWH on prem
for new deployment ussally cloud is cheaper
DR / HA is more easy
cloud = consumption based
on prem = resource owned based => scaling is much less a considartion

there is limits to up scaling ( vertical scaling ) = more
scale out + (horizontal scaling)