Oracle Grid general questions

Our applications are running on their own application and database servers. We have a mix of hardware including Sun 4800, Sun 450, Sun 280, Sunfire 280, Dell Intel, etc. The OS on Sun boxes is Solaris 8 and on Dell Intel is Windows NT and 2000. To migrate to the grid infrastructure, are we able to make use of our existing hardware or do we need to upgrade them to make them grid ready or do we need to purchase new hardware all together leaving our current hardware investment behind?
When building either database or application cluster, is it possible to have a mix of hardware in the same cluster? For instance, can we have a cluster setup with a Sun box running one instance while a NT box running another?
How is oracle version upgrade handled in a cluster? Do we need to take all of the instances down to upgrade them at the same time or can we do the upgrade one at a time? If the latter option is doable, does that mean oracle cluster can support multi-version instances?
What happens if the upgrade involves upgrading the database as well?
In Oracle 10g, is it possible to run dataguard on two oracle versions at the same time? You run into this situation during oracle upgrade where you are upgrading the standby database while the primary database is running in production. After the upgrade, the standby database will be in a newer version than primary.

Q. Our applications are running on their own application and database servers. We have a mix of hardware including Sun 4800, Sun 450, Sun 280, Sunfire 280, Dell Intel, etc. The OS on Sun boxes is Solaris 8 and on Dell Intel is Windows NT and 2000. To migrate to the grid infrastructure, are we able to make use of our existing hardware or do we need to upgrade them to make them grid ready or do we need to purchase new hardware all together leaving our current hardware investment behind?
A. Oracle Database 10g offers a variety of features for CPU provisioning and Data provisioning that you can use to utilize your resources efficiently. Of course, you get the best resource utilization if you can cluster homogeneous resources and run all your databases on the same cluster. This is not always possible � you may have heterogeneous resources or you may have geographically distributed data centers. For such cases, you can use our data provisioning features to offload processing across these resources.
Our suggestion will be that you start off with the resources you have got now. You use our features that best fit your current IT infrastructure. Later when you want to acquire more hardware resources, you have more choices � you can acquire cheaper low-cost commodity hardware and run your databases on them.
Q. When building either database or application cluster, is it possible to have a mix of hardware in the same cluster? For instance, can we have a cluster setup with a Sun box running one instance while a NT box running another?
A. While building a cluster, you need homogeneous cluster � all the nodes need to have the same OS. Do you really want to have a heterogeneous cluster to run your databases? What about the complexities of troubleshooting o/s or Oracle issues, fail-over, possible port-specific Oracle bugs, the differences in compiled PL/SQL or Java or external procedures? Does any of this make the possible benefits worth it?
Q. How is oracle version upgrade handled in a cluster? Do we need to take all of the instances down to upgrade them at the same time or can we do the upgrade one at a time? If the latter option is doable, does that mean oracle cluster can support multi-version instances?
A. The Oracle Database 10g supports the application of patches to the nodes of a Real Application Cluster system in a rolling fashion. You can apply these patches one instance at a time. You quiesce one instance, apply patch to that instance, and reactivate and rejoin the patched instance to the cluster. While you are doing these, your applications on the RAC database are still running.
You can run system in the mixed mode for an arbitrary period to ensure that the patch corrects the original problem and has not introduced some other problem.
Q. What happens if the upgrade involves upgrading the database as well? In Oracle 10g, is it possible to run dataguard on two oracle versions at the same time? You run into this situation during oracle upgrade where you are upgrading the standby database while the primary database is running in production. After the upgrade, the standby database will be in a newer version than primary.
A. The Oracle Database 10g supports the installation of database software upgrades, and the application of patchsets, in a rolling fashion � with near zero database downtime � by using Data Guard SQL Apply. You establish the standby database using Data Guard. You upgrade the standby database. You can then continue running in this configuration for an arbitrary period of time. Later you can do a database role reversal and switchover of standby to the production database.

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943714 wrote:
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new4oracle wrote:
Hi, i am very new to Oracle world, please forgive me if my question is too silly.
I am currently practice Oracle on my Windows 2008 server. When i try to install ASM, i found i have to install 'Oracle Grid Infrastructure'. ok, i went o Oracle download page, i found the 'Oracle Grid Infrastructure 11g Release 2 (11.2.0.1.0)'. But it only has Linux\Solaris\HP-UX\AIX\zLinux to choose from. Where can I found the Windows version?edelivery.oracle.com
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I'm trying to convince our systems administrator about the need for us to use Oracle Grid Infrastructure with our 11gR2 database installation. I find that I'm not really sure what the main advantages are, could you help please?
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Any documentation recommendation would help please. I have been on the 11gR2 course and I have Oracle documentation but I am unable to see (or maybe it is lack of understanding) what is the main thing that will make us use it over an installation that uses file system storage.
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I actually meant to copy and paste the benefits of using ASM out of it which answers the question OP had of using GRID for storage, (I had actually typed "see this bit") and was using the link as the reference, nont sure why I didnt, I mustnt have pasted properly into the post before posting. GRID as we know offers the asm usage which is the storage part of it. I have that link in my notes for reference when looking for the arguments to use ASM. From that link
•Provides automatic load balancing over all the available disks, thus reducing hot spots in the file system
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Hello Stefan,
we are both on one line. I would also prefer a simple active-passive cluster setup to a full blown RAC or even a RAC One Node. especially if the license fee for Clusterware is significantly lower than for RAC. However, Oracle staff makes it really clear that Oracle does not want customers to implement active-passive clusters based on Clusterware without RAC. They even say this active-passive cluster is no longer supported on 11.2. by Oracle! Of course it worked fine with 11.1 and there is no reason why it should be technically no longer possible with 11.2. WIth this adverse winds from Oracle blowing in our face, it doesn't make sense to implement such a active-passive cluster any more, however elegent it might have been technically.
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Regards,
Mark

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