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archivelogs [message #337813] Fri, 01 August 2008 04:55 Go to next message
rsreddy28
Messages: 295
Registered: May 2007
Senior Member
Hello All,

we have implemented RAC on a 2 node cluster on LINUX AS4 ,Oracle 10g.

My doubt is why do we need separate logfiles,undo tablespaces when we are using a common storage for the database.
And even when a logswitch happens , the archive file is with respect to each instance and not global, why.

Please guide me .

Regards,
Raj
Re: archivelogs [message #337829 is a reply to message #337813] Fri, 01 August 2008 05:21 Go to previous messageGo to next message
Mahesh Rajendran
Messages: 10630
Registered: March 2002
Location: oracleDocoVille
Senior Member
Account Moderator
It is the way RAC works.
By requirement if one instance dies, the other should be fully functional. So RAC needs individual components/threads.
RAC is nothing but different instances sharing a common storage for common objects.
>>And even when a logswitch happens , the archive file is with respect to each instance and not global, why.
The transaction is happening to a particular instance only. So archives are created for that instance only.

[Updated on: Fri, 01 August 2008 05:22]

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Re: archivelogs [message #337834 is a reply to message #337829] Fri, 01 August 2008 05:30 Go to previous message
rsreddy28
Messages: 295
Registered: May 2007
Senior Member
Thanks Mahesh
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