【翻译自mos文章】私有网络所用的协议 与 Oracle RAC

说的太经典了，不敢翻译，直接上原文。



来源于：

Network Protocols and Real Application Clusters (文档 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 professionals 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 many 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 System	Clusterware		Network Hardware	RAC Protocol
----------------	-----------		----------------	--------
HP OpenVMS		HP OpenVMS		Gigabit Ethernet	TCP (UDP for 10gR1 and above)
HP Tru64		HP TruCluster		Memory Channel	 	RDG
HP Tru64		HP TruCluster		Memory Channel	 	UDP
HP Tru64		HP TruCluster		Gigabit Ethernet 	RDG		
HP Tru64		HP TruCluster		Gigabit Ethernet 	UDP
HP-UX			Oracle Clusterware	Hyperfabric		UDP
HP-UX			Oracle Clusterware	Gigabit Ethernet 	UDP		
HP-UX			HP ServiceGuard		Hyperfabric		UDP
HP-UX			HP ServiceGuard		Gigabit Ethernet 	UDP
HP-UX			Veritas Cluster		Gigabit Ethernet 	LLT
HP-UX			Veritas Cluster		Gigabit Ethernet 	UDP
IBM AIX			Oracle Clusterware	Gigabit Ethernet (FDDI)	UDP
IBM AIX			HACMP			Gigabit Ethernet (FDDI)	UDP
Linux			Oracle Clusterware	Gigabit Ethernet 	UDP
Microsoft Windows	Oracle Clusterware	Gigabit Ethernet 	TCP			
Sun Solaris		Oracle Clusterware	Gigabit Ethernet 	UDP		
Sun Solaris		Fujitsu Primecluster	Gigabit Ethernet	ICF		
Sun Solaris		Sun Cluster		SCI Interconnect	RSM		
Sun Solaris		Sun Cluster		Firelink interconnect	RSM		
Sun Solaris		Sun Cluster		Gigabit Ethernet 	UDP		
Sun Solaris		Veritas Cluster		Gigabit Ethernet 	LLT
Sun Solaris		Veritas Cluster		Gigabit 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), the

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 strongly 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