Oci

Exadata Cloud@Customer (ExaCC) delivers the Oracle Cloud control plane experience on Exadata hardware that physically resides in the customer’s data centre. For organisations with data residency requirements, latency-sensitive applications that cannot tolerate public cloud networking, or regulatory constraints that prohibit off-premises data, ExaCC is the path to Autonomous Database and managed Exadata without public cloud. Understanding ExaCC’s architecture — particularly the control plane / data plane separation and the VM Cluster model — is essential for architects sizing, operating, and troubleshooting the platform. ...

Migrating an Oracle database to OCI involves more than moving data — it requires selecting the correct migration toolchain, designing for cutover, and managing risk. Oracle provides multiple migration paths, and choosing incorrectly leads to extended downtime or data integrity issues. This article compares the major approaches and provides decision criteria. Migration Approach Decision Tree Is downtime during migration acceptable? ├── YES (hours or more acceptable) │ ├── Database size < 1 TB → Data Pump (expdp/impdp) over network or pre-stage to Object Storage │ └── Database size > 1 TB → RMAN duplicate or backup/restore to OCI Object Storage └── NO (near-zero or zero downtime required) ├── Source is Oracle → Zero Downtime Migration (ZDM) with GoldenGate └── Source is non-Oracle → OCI Database Migration Service (DMS) Zero Downtime Migration (ZDM) Oracle ZDM is the recommended tool for migrating Oracle databases to OCI with minimal or zero downtime. It orchestrates a combination of RMAN (initial bulk copy) + GoldenGate (ongoing replication during migration) in an automated workflow. ...

Oracle Base Database Service (formerly DB System) is OCI’s IaaS-level Oracle Database offering — you provision a VM or Bare Metal shape, OCI installs and manages Oracle Database, and you retain full DBA control. Understanding its HA architecture is essential for designing systems that meet enterprise RPO/RTO targets. Shape Selection and Its HA Implications Base Database Service runs on two shape families: VM shapes (VM.Standard, VM.Optimized) — single or 2-node RAC. Bare Metal shapes (BM.DenseIO) — single instance with local NVMe, high IOPS. For high availability, the critical shape decision is whether to provision a 2-node RAC or a single-instance + Data Guard architecture. These are not equivalent: ...

Oracle Autonomous Database (ADB) is often described in marketing terms: “self-driving, self-securing, self-repairing.” For architects and senior DBAs, the more useful question is: what does it actually do automatically, how does it do it, and where do you need to intervene? This article peels back the automation layers. The Infrastructure Foundation Every ADB instance runs on Exadata Cloud Service (ExaCS). This is not incidental — it is the technical prerequisite for the automation that ADB delivers. The Smart Scan offload, HCC compression, and storage index features described elsewhere in this blog are all active beneath every ADB workload. ...