Oracle RAC support issue

[Bruno Bossier_1]

My Oracle dba collegue told me that he read somewhere that Oracle RAC is not supported with point-to-point connections. We have several RAC's with each 2 hyperfabric point-to-point connections (no switches) and that seems to work.

Does anyone know more about this ? Maybe this is only Windows related, because when you unplug a cable from a NIC on Windows, the ip address is apparent lost.

Bruno

[Zygmunt Krawczyk]

Hi Bruno,

Oracle RAC on HP-UX MC/SG with HF is supported with point-to-point connections as long as the cluster is 2-node. Switches are required if you want to have more than 2 nodes.

Regards,
Zygmunt

[Zygmunt Krawczyk]

See the doc:
"HyperFabric Administratorâ s Guide" - page 26
(or 40)
http://www.docs.hp.com/hpux/pdf/B6257-90039.pdf

Regards,
Zygmu

[Bruno Bossier_1]

OK, thanks !

Bruno

[Bruno Bossier_1]

I would like to come back to this.

My 2-node Serviceguard cluster has dual point-to-point hyperfabric connections. Each node has 2 cards which make up a card-pair as configured with clic_init and I said Y to the question if I was going to use HMP for Oracle RAC.

Is this a HP and Oracle supported setup ? When I look in the Hyperfabric documentation, it says that I can have a single point-to-point connection, but from the moment I add a node or an adapter to the cluster, I need switches.

Can someone shed some light on this ?

Oracle was relinked to use the HMP protocol. We did fail-over tests yesterday, but they all failed. With UDP all works fine.

Bruno

[Zygmunt Krawczyk]

Hi Bruno,

in configuration with point-to-point connections in 2-node RAC cluster with dual HF2 connections, you can use only UDP protocol.
See the doc:
"HyperFabric Configuration Guidelines" - page 16
http://docs.hp.com/hpux/pdf/B6257-90041.pdf

HMP with multiple HF connections requires the HF switch. The best practices is use of two switches.
See the doc:
"HyperFabric Configuration Guidelines" - page 31
http://docs.hp.com/hpux/pdf/B6257-90041.pdf

Remember to use the current HF drivers:
http://www.software.hp.com/portal/swdepot/displayProductInfo.do?productNumber=Hyper00

Regards,
Zygmunt

[Augusto Castro]

Some additional information:

http://otn.oracle.com/products/oracle9i/htdocs/9iRAChp.html#4

@Oracle metalink: Note:278132.1: Network Protocols and Real Application Clusters