Understanding Oracle Exadata Architecture and Configuration: Key Insights & Commands
🚀 Oracle Exadata is a high-performance, optimized platform for running Oracle databases. Its architecture combines powerful database servers, storage servers, and a high-speed fabric to deliver unparalleled performance, scalability, and reliability.
🔹 Key Components of Exadata Architecture:
✅ Database Servers (Compute Nodes): Run Oracle Database instances.
✅ Storage Servers (Cell Nodes): Smart storage layer with Hybrid Columnar Compression, Smart Scans, and Storage Indexing.
✅ InfiniBand Network: High-speed fabric connecting DB servers and storage for ultra-low latency.
✅ Oracle Exadata Software: Automates optimizations for query execution, caching, and failover.
🚀 Exadata Configuration: Key Commands & Steps
1️⃣ Checking Exadata Model & Version
To check the Exadata hardware model and version:
imageinfo | grep -i “Image version”
To list available patches:
exachk -a
2️⃣ Checking Cell Storage & Configuration
List all Exadata Storage Cells:
dcli -g cell_group -l root cellcli -e “list cell detail”
Check the status of all storage cells:
cellcli -e “list cell”
View disk status:
cellcli -e “list griddisk”
3️⃣ Monitoring Performance & Workload
Check active IORM (I/O Resource Management) settings:
cellcli -e “list iormplan detail”
Monitor Smart Scans:
cellcli -e “list flashcachecontent”
Check Database & ASM Load:
dcli -g dbs_group -l root “top -b -n 1 | head -20”