RAC + Data Guard

Does it make sense to have RAC together with Data Guard. RAC will give you the failover/swithover since the database is on each server and wouldn't you need the same number of servers in you Data Guard to keep the read/write performance the same? I other words, if you have 6 nodes in your RAC environment sharing RAM and CPU resources, would this be bottlenecked by one Data Guard server?
msimons4Asked:
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sventhanCommented:
<  I other words, if you have 6 nodes in your RAC environment sharing RAM and CPU resources, would this be bottlenecked by one Data Guard server?
No. If you want to have a basic data guard config. it would not be a issue. You can have multi node RAC and single node standby. I've seen many places they've this type of RAC/DG configured to avoid the cost.

In other words, RAC DG configuration is just used for backup/DR scenario.

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msimons4Author Commented:
Do you know of any good articles that explain how to set up Data Guard in a RAC environment?
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sventhanCommented:
DB & OS version please? What file system do you like to use?
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sventhanCommented:
check this out also refer the oracle document....

http://www.oracledba.org/index.html
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msimons4Author Commented:
11.2.0.1, OEL 5.7
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slightwv (䄆 Netminder) Commented:
>>RAC will give you the failover/swithover since the database is on each server

In Oracle the database consists of the files on disk (data, redo, control, etc...).  An Instance is the memory structures and server processes.

RAC shares database files and each node runs an individual instance.

RAC is NOT High Availability (HA) since it shares common disks.

Data Guard adds the HA portion.
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