Availability zone · AZ
An isolated data-center location within a cloud region, designed to fail independently of its peers.
Current numbers
$0.087–0.12/GBfirst-tier internet egress (Azure ~$0.087, AWS ~$0.09, GCP Premium ~$0.12); cross-region/AZ extra; ~$90k to move 1 PB
99.99% / 99.5%hyperscaler compute SLA: multi-AZ region-level vs single-instance Monthly Uptime
~10x fasterS3 Express One Zone data access vs S3 Standard; up to 80% lower request cost; single-AZ