What is Infiniband in Exadata?

What is Infiniband in Exadata?

Infiniband Network of Exadata Infiniband Network is a high-performance, very low-latency network layer that is active-active in all directions at 40 Gb / sec, which enables communication between the Database Server and Storage Server like following picture. In quarter and 1/8 Exadata have only two auxiliary switches.

How many racks can be configured without a spine switch?

Up to eight racks can be cabled together without external RDMA Network Fabric switches. Review this information before cabling two racks together with InfiniBand Network Fabric.

Why is Exadata so fast?

The Smart Flash Cache intelligently caches key data to minimize physical I/Os. The second key feature that contributes to the speed of Exadata is the use of an advanced database compression feature called Hybrid Columnar Compression, which lets the database compress data at 10x times the original data.

What is socket in Exadata?

The difference is that Exadata x8-8 servers consists of 8 socket servers and x8-2 consist of 2 Socket Servers for CPU Processor. X8-8 having 8 sockets of 24 core intel Xeon Platinum 8200 Processor which total upto 192 CPU Cores. It also have 96 DIMM Slots with total memory of 6TB.

What is Dom0 and DomU in Exadata?

An Exadata Database Server contains at least one Virtual Machine (VM), known as DomU, running on a VM hypervisor or virtual machine monitor(VMM), known as Dom0. Dom0. Oracle uses the Integrated Lights Out Manager (ILOM) which is a highly specialized tool created to manage and monitor servers.

What is IB switch in Exadata?

IB Switches are used for the storage network as well as the Oracle RAC interconnect. Exadata compute nodes and storage cells are configured with dual-port InfiniBand ports and connect to each of the two leaf switches. You can access IB Switches using command line and Web ILOM. IB Switches run Linux operating system.

Can we connect Layer 3 device to spine?

A leaf-spine topology can be layer 2 or layer 3 depending upon whether the links between the leaf and spine layer will be switched or routed. In a layer 2 leaf-spine design, Transparent Interconnection of Lots of Links or Shortest Path Bridging takes the place of spanning-tree.

What is the difference between spine and leaf switch?

The spine layer is made up of switches that perform routing, working as the backbone of the network. The leaf layer involves an access switch that connects to endpoints like servers, storage devices.

Is Exadata a database?

The Oracle Exadata Database Machine (Exadata) is a computing platform optimized for running Oracle Databases. Oracle Corporation manages this service, including hardware, network, Linux software and Exadata software, while customers have complete ownership of their databases.

What is difference between Oracle and Exadata?

Differences: Oracle Database Appliance is not Exadata. Exadata is a pre-configured combination of hardware and software that provides an infrastructure solely for running Oracle Database. Oracle Database Appliance (ODA) is an integrated highly available (HA) database and applications system in a single box.

What is Exadata rack?

Exadata storage provides an advanced compression technology, Hybrid Columnar Compression, that typically provides 10x, and higher, levels of data compression. The Exadata Storage Expansion Rack enables the growth of Exadata storage capacity and bandwidth for X2-2 and X2-8 Exadata Database Machines.

What is Exadata cell?

Exadata is a modern architecture featuring scale-out industry-standard database servers, scale-out intelligent storage servers, and an extremely high speed InfiniBand internal fabric that connects all servers and storage.

What is InfiniBand network of Exadata?

Infiniband Network of Exadata. Infiniband Network is a high-performance, very low-latency network layer that is active-active in all directions at 40 Gb / sec, which enables communication between the Database Server and Storage Server like following picture. Full and half Exadata have one main and two secondary Infiniband Switches.

How to extend Oracle Exadata Database Machine quarter racks?

Oracle Exadata Database Machine Quarter Racks can be extended as follows: Connect two Oracle Exadata Database Machine Quarter Racks together. At least four of the six ports reserved for external connectivity are open on each leaf switch. The six ports are 5B, 6A, 6B, 7A, 7B, and 12A in each leaf switch.

What is the spine switch in Oracle Exadata Database Machine?

The spine switch in the Oracle Exadata Database Machine Half Rack or Oracle Exadata Database Machine Full Rack remains as the spine switch. Maintain the existing seven inter-switch links between the leaf switches within each rack. Connect the leaf switches between the racks with two links each, using the ports reserved for external connectivity.

How are Exadata Storage Servers discovered in Exadata?

Exadata Storage Servers are discovered using ibnetdiscover instead of kfod. I have trimmed all the output for this command since it results very detailed output about IB association targets. The /opt/oracle.SupportTools/ibdiagtools/verify-topology utility is used to validate the InfiniBand cabling within your Exadata Database Machine.