147 lines
5.2 KiB
YAML
147 lines
5.2 KiB
YAML
# OCI Service: Autonomous Database Serverless (ADB-S)
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# Last verified: 2026-03
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service:
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name: "Autonomous Database Serverless (ADB-S)"
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id: adb_serverless
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category: database
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color: "#AA643B"
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features:
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auto_scaling: true
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auto_indexing: true
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auto_tuning: true
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auto_patching: true
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transparent_application_continuity: true
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autonomous_data_guard: true
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private_endpoints: true
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byol_eligible: true
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ha_dr_options:
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local_ha: "Built-in TAC (Transparent Application Continuity) — ~0 perceived RTO"
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same_region_adg: "Autonomous Data Guard standby — synchronous, RPO 0"
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cross_region_adg: "Cross-region ADG — asynchronous only, RPO seconds, RTO < 15 min"
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limits:
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max_ocpu: 128
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max_storage_tb: 383
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max_auto_scale: "3x base OCPUs"
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auto_scale_activation: "2-3 minutes"
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min_ocpu: 1
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min_storage_tb: 1
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variants:
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- id: adb_s
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name: "Autonomous Database Serverless (ADB-S)"
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description: "Shared Exadata infrastructure, fully managed, auto-scaling"
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workload_types:
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- ATP (Transaction Processing / Mixed)
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- ADW (Data Warehouse / Analytics)
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- AJD (JSON Document Store)
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- APEX (Low-code application development)
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- id: adb_d
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name: "Autonomous Database on Dedicated Exadata (ADB-D)"
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description: "Dedicated Exadata infrastructure, full isolation"
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use_when:
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- "Strict isolation requirements (regulatory, multi-tenant)"
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- "Predictable performance with no noisy-neighbor risk"
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- "Need RAC for horizontal compute scaling"
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- "> 128 OCPUs sustained"
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when_to_use:
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- "Oracle Database workloads migrating to cloud"
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- "Need automated patching, tuning, and scaling"
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- "BYOL opportunity with existing Oracle DB licenses"
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- "JSON document workloads (AJD)"
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- "Rapid APEX application development"
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- "Data warehouse / analytics with auto-scaling"
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when_not_to_use:
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- "Non-Oracle database engines (use MySQL HeatWave, PostgreSQL, NoSQL)"
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- "Need OS-level access or custom DB home configuration → use DBCS"
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- "Need RAC but not ADB-D budget → use ExaCS or DBCS VM"
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- "Workloads requiring specific DB patches not yet in ADB"
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- "Extreme IOPS requirements > what Exadata provides"
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sizing:
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adb_s:
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min_ocpu: 1
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max_ocpu: 128
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auto_scaling: "Up to 3x base OCPUs (takes 2-3 minutes to activate)"
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sizing_guidance: "Size base OCPUs for P75 sustained load, not P50. Auto-scaling covers peaks but has activation latency."
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storage_min_tb: 1
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storage_max_tb: 383
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iops: "Proportional to OCPU count, Exadata storage servers"
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adb_d:
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min_ocpu: "2 per VM (minimum 2 VMs for HA)"
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max_ocpu: "Per Exadata infrastructure shape"
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rac: true
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storage: "Exadata storage dependent on infrastructure shape"
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gotchas:
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- id: adb_s_autoscale_latency
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severity: MEDIUM
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description: "Auto-scaling activation takes 2-3 minutes. Size base OCPUs for P75, not average."
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- id: adb_s_private_endpoint
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severity: HIGH
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description: "Always use private endpoints for production. Public endpoints allow internet access to the DB listener."
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- id: adb_s_service_gateway
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severity: MEDIUM
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description: "ADB-S requires a Service Gateway in the VCN for automated backups to Object Storage."
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- id: adb_s_byol_savings
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severity: LOW
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description: "BYOL pricing is ~50% cheaper than License Included. Always check if customer has existing Oracle DB licenses."
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- id: adb_d_minimum_infra
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severity: HIGH
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description: "ADB-D requires dedicated Exadata infrastructure — minimum cost is significant. Don't recommend for small workloads."
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- id: adb_data_guard_async
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severity: MEDIUM
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description: "Cross-region Autonomous Data Guard is async only (RPO > 0). For zero RPO, need same-region standby or ADB-D with local Data Guard."
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- id: adb_19c_only
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severity: LOW
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description: "ADB currently runs Oracle 19c. If customer needs 23ai features, verify availability."
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implied_dependencies:
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- service: service_gateway
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reason: "Required for automated backups to Object Storage"
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- service: private_endpoint
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reason: "Production workloads must use private endpoints"
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- service: oci_vault
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reason: "Customer-managed encryption keys (recommended for production)"
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- service: data_safe
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reason: "Security assessment, audit, and data masking"
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competitive:
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vs_aws_rds:
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advantages:
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- "Autonomous operations (auto-patching, auto-tuning, auto-scaling)"
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- "Dramatically lower DB licensing cost with BYOL"
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- "Exadata performance for Oracle workloads"
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disadvantages:
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- "No multi-engine support (Oracle only)"
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- "Auto-scaling latency vs. Aurora's faster scale-out"
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vs_azure_sql:
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advantages:
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- "Oracle-native features (RAC, Data Guard, Advanced Compression)"
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- "BYOL cost advantage"
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disadvantages:
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- "Azure has broader SQL Server ecosystem integration"
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references:
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documentation: "https://docs.oracle.com/en/cloud/paas/autonomous-database/"
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pricing: "https://www.oracle.com/autonomous-database/pricing/"
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sizing_guide: "https://docs.oracle.com/en/cloud/paas/autonomous-database/adbsa/autonomous-database-cpu.html"
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changelog:
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- date: "2026-03-14"
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contributor: { name: "Diego Cabrera", team: "Field Architecture" }
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change: "Initial creation with sizing rules, gotchas, competitive notes, HA/DR options"
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