Oracle 10g RAC WITHOUT ServiceGuear and SGeRAC

[Marc Dijkstra]

Hi all,

2 x RP7410
HP-UX 11i v 1.0
XP512
Oracle 9i RAC
ServiceGuard OPS (11.14)
Hyperfabric

We are currently running the above with 9i and RAW areas on the XP, and are busy testing Oracle 10g RAC. Simply put, can I do this WITHOUT serviceguard? Just with Oracle CFS and ASM?

According to the 10G documentation:

Real Application Clusters
â   HP Serviceguard A11.15.00 or higher
â   HP Serviceguard Extension for RAC A11.15.00 or higher
â   HyperFabric software - Required if you want to use Hyper Messaging protocol as
the cluster interconnect
â   .01 or higher

Note: HP Serviceguard is required only if you want to use shared logical volumes for
CRS or database files.

Very vague....

I cannot find any information on how this is/has been done.... anywhere.

[Julio Yamawaki]

Sorry for this late post:

You need to install SG, RAC will work only with SG. SG will monitor all UNIX resources.
Also, you will need SGeRAC for Oracle 10g.

[J Drummey]

10g comes with cluster software called CRS which can be used to create a cluster. 10g also comes with Automated Storage Manager, which accepts disks ( or LUNS ) as devices and manages database storage internally.

It's possible theoretically to create an HPUX RAC cluster without ServiceGuard (with one caveat). The cluster control files must sit on shared storage outside of the ASM storage. On Linux, we use OCFS for that. I don't believe that OCFS is available for HPUX, so you need SOME type of
shared storage for the cluster files. Feeling brave? Try some redundant network storage....

Most people using HPUX will do this with SG.
Also note that 9i does require underlying cluster software since none is provided from
Oracle.

[Steven E. Protter]

RAC has its own clustering system. I don't think you need to have Servicguard but it does add other features.

I think your note at the bottom says it best, vague as it is.

Oracle tried to talk me out of purchasing SG because they said RAC could do the same thing. The only problem with that was we have non-oracle apps and didn't want to move from ias to RAC.

There should be documentation on how to do this on one of these sites:

http://technet.oracle.com
http://otn.oracle.com
http://metalink.oracle.com

SEP

[Indira Aramandla]

Hi Marc,

CRS (Cluster Ready Services) is a new feature for Oracle 10g Real Application Clusters (RAC), that provides a standard cluster interface on all platforms and performs new high availability operations not available in previous versions

CRS is REQUIRED to be installed and running prior to installing 10g RAC. CRS can either run on top of the vendor clusterware (such as Sun Cluster, HP Serviceguard, .. etc...) or can run without the vendor clusterware.

The vendor clusterware was required in 9i RAC but is optional in 10g RAC.


Indira A

[Delrish]

Hi,

Yes it is possible. I installed it successfully, but i have a problem that i think it is related to my SAN. (I sent to it for group you can find it with subject " DBCA took about 6 hours ...) However do not forget you should just use ASM for database and recovery files.Oracle will manage the files system by itself. you can add or remove a disk to oracle when it is up.

Alireza

[Marc Dijkstra]

Hey all,

Man seems an age since I posted this - yes we got it working. Did a very interesting POC with it too... For your interest, the following caveats must be kept in mind when using CRS/ASM:

1) Oracle gives NO NIC failover functionality - thus APA is a must.
2) Oracle gives NO FC failover capability, as ASM does not use LVM, the simplest is to use something like securepath with your MA/VA/MSA/XP when doing this - Oracle sees the alternate paths as seperate paths. I did not manage to test Veritas/Symantec DMP.
3) For failover of the Hyperfabric, use the latest driver.

Thanks for the replies - I should have closed this a while back.

Happy new year!

MND

[Marc Dijkstra]

see above

[joshua81]

hi can you please send me a documentation of how you did the installation for 10g rac without service guard i really need this as my company has ask me to install rac without one

thanks
joshua