keyword 12 GB Free = 1 GB Shared = 1 GB Basic = 10 GB Standard = 50 GB Premium = 250 GB Isolated = 1 TB

"Shared" & "All" == Public

expenditure (buying hardware)

operating expenditure (paying for service as you use it)

Regions > Zones > Datacenters > Availbility Sets (Rack)

azure synapse analytics = Warehouse Azure cosmos = even larger than the globe (global) : cosmos Azure HDInsight = HaDoop

Hot : Optimized for storing data that is accessed frequently. Cool : Optimized for storing data that is infrequently accessed and stored for at least 30 days. Archive : Optimized for storing data that is rarely accessed and stored for at least 180 days with flexible latency requirements, on the order of hours.

Only the hot and cool access tiers can be set at the account level.

The archive access tier can only be set at the blob level

Azure Advisor provides recommendations on high availability, security, performance and cost.