OCI Block Volume Deep Dive

In modern cloud environments, storage plays a critical role in application performance and reliability. In Oracle Cloud Infrastructure (OCI), Block Volume provides scalable, high-performance storage that can be attached to compute instances. This article provides a deep dive into OCI Block Volume, covering architecture, performance concepts such as VPUs and autotuning, attachment methods including iSCSI and paravirtualized, hands-on commands, monitoring, and real-world troubleshooting scenarios. What is OCI Block Volume OCI Block Volume is a network-based storage service that provides persistent storage for compute instances. It is commonly used for: Databases Application storage Boot volumes High-performance workloads Architecture Overview Architecture Diagram Compute Instance │ ▼ Attachment Layer (iSCSI / Paravirtualized) │ ▼ OCI Block Volume Service │ ▼ Distributed Storage Backend OCI Block Volume is decoupled from compute, meaning storage persists even if the instance is terminated