[Translated from mos] protocol used by the private network and OracleRAC

[Translated from mos] protocol used by the private network and OracleRAC

It is too classic to translate.

Source:

Network Protocols and Real Application Clusters (Document ID 278132.1)

PURPOSE
-------

Purpose of this document is to give DBAs and Systems Administrators interested
In Real Application Clusters an overview and a comparison of network protocols
Available.

SCOPE & APPLICATION
-------------------

DBAs and IT release sionals may use this note for their physical cluster layout
And the options they have available on their platform.

NETWORK PROTOCOLS AND REAL APPLICATION CLUSTERS
-----------------------------------------------

With Real Application Clusters, there are using different interconnect protocols
Available to use with the high speed interconnect.

On Unix platforms, Oracle typically recommends Infiniband (RDS) where it is certified. See
Note: 751343.1 for more information on the RDS protocol. Here are the hardware and RAC protocol
Alternatives for each platform (not including RDS ):

Operating SystemClusterwareNetwork HardwareRAC Protocol---------------------------------------------------HP OpenVMSHP OpenVMSGigabit EthernetTCP (UDP for 10gR1 and above)HP Tru64HP TruClusterMemory Channel RDGHP Tru64HP TruClusterMemory Channel UDPHP Tru64HP TruClusterGigabit Ethernet RDGHP Tru64HP TruClusterGigabit Ethernet UDPHP-UXOracle ClusterwareHyperfabricUDPHP-UXOracle ClusterwareGigabit Ethernet UDPHP-UXHP ServiceGuardHyperfabricUDPHP-UXHP ServiceGuardGigabit Ethernet UDPHP-UXVeritas ClusterGigabit Ethernet LLTHP-UXVeritas ClusterGigabit Ethernet UDPIBM AIXOracle ClusterwareGigabit Ethernet (FDDI)UDPIBM AIXHACMPGigabit Ethernet (FDDI)UDPLinuxOracle ClusterwareGigabit Ethernet UDPMicrosoft WindowsOracle ClusterwareGigabit Ethernet TCPSun SolarisOracle ClusterwareGigabit Ethernet UDPSun SolarisFujitsu PrimeclusterGigabit EthernetICFSun SolarisSun ClusterSCI InterconnectRSMSun SolarisSun ClusterFirelink interconnectRSMSun SolarisSun ClusterGigabit Ethernet UDPSun SolarisVeritas ClusterGigabit Ethernet LLTSun SolarisVeritas ClusterGigabit Ethernet UDP

Oracle Corporation primarily tests and supports the RDS and UDP network libraries (and
TCP for Windows). For other proprietary protocols (RDG, ICF, and LLT),
Cluster vendor writes and supports the network libraries.

Oracle Corporation has done extensive testing on the Oracle provided RDS and UDP
Libraries (and TCP for Windows). Based on this testing and extensive experience
With production customer deployments, at this time Oracle Support stronugly recommends
The use of RDS or UDP (or TCP on Windows) for RAC environments.

RE-LINKING TO CHANGE PROTCOLS
-----------------------------

To switch to the udp protocol, shut down the instances and re-link on each node
With:

Cd $ ORACLE_HOME/rdbms/lib
Make-f ins_rdbms.mk ipc_g ioracle

9i command:

Cd $ ORACLE_HOME/rdbms/lib
Make-f ins_rdbms.mk ipc_udp ioracle

To confirm that the UDP protcol is being used, run the 'oradebug ipc 'command
As described in Note 181489.1. Note 181489.1 also contains some tuning
Recommendations for various protocols.

BEST PRACTICES FOR UDP
----------------------

-Have at least a gigabit ethernet for optimal performance
-Do not use crossover cables (use a switch)
-Increase the udp buffer sizes to the OS maximum
-Turn on udp checksumming

RELATED DOCUMENTS
-----------------

Note 181489.1-Tuning Inter-Instance Performance in RAC and OPS
Note 751343.1-RAC Support for RDS Over Infiniband
Oracle Real Application Clusters Installation and Configuration Guide