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Day2

  Here's a brief explanation of each Exadata network component you've listed: 1. Management Network Purpose : For administrative access, patching, OEM, monitoring, and SSH. Interface : eth0 or mgmt0 Connected to : Management switches Speed : Typically 1GbE Example use : dcli , ssh , SNMP monitoring 2. ILOM Network Purpose : Out-of-band hardware-level management (power, console, diagnostics). Device : ILOM (Integrated Lights Out Manager) Dedicated port : Separate from OS-managed NICs Access via : Web UI, SSH, IPMI 3. Client Network Purpose : Client/application connectivity using SCAN, VIPs, and listeners. Interface : bond0 , eth1 , or net0/net1 (varies by hardware/gen) Speed : 10/25/100 GbE depending on model Connected to : Corporate network or load balancer DNS dependency : For SCAN resolution 4. InfiniBand / RoCE Network Purpose : Internal communication between: DB nodes (RAC interconnect / Cache Fusion) DB nodes and storage (iDB for Smart Sc...
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Day1

 DMA Roles (Database Machine Administrator) The Database Machine Administrator (DMA) is responsible for managing and maintaining the Exadata Database Machine, which is a fully integrated system designed to run Oracle databases efficiently. It includes the following core components: 1. Database Servers (DB Servers) Run Oracle database instances. Provide compute and memory resources. 2. Storage Servers Smart storage cells that handle data-intensive operations. Offload processing from DB servers using features like Smart Scan. 3. Network Infrastructure InfiniBand Switches Used in Exadata X8 and earlier for high-bandwidth, low-latency interconnects. ROCE Switches (RDMA over Converged Ethernet) Introduced in X8M (since September 2019) . Typically Cisco switches used. Persistent Memory (PMEM) Introduced in X8M . Used to accelerate data access in storage servers. 4. Administration Network Admin/Management Switch Typically a Cisco Ethernet Switch . ...
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