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Choosing LUN size for ASM

I am migrating a 500GB, 11Gr2 db from file system to ASM. The db runs on Solaris 10 with Clarion storage.
I would like to know what will be the appropriate LUN size for the setup. I have googled and I know there is no prefect figure for LUN size.

Can anyone please share his/her experiences about how you decided on your LUN size?
What factors to consider?

Thanks in advance.
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shomilb
Asked:
shomilb
2 Solutions
 
Franck PachotCommented:
Hi,

The most important thing is to have equally sized LUN in a diskgroup, all LUN having same size and performance. So you should consider the size you will want to add when you need to increase the diskgroup.
For example, if you have 500GB and want to increase the size by 100GB when you will need, then you will create 5 LUN of 100GB.

If adding space by 100GB is too large, then you should plan for smaller size.

Regards,
Franck.
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shomilbAuthor Commented:
Thanks for the input Franck, will keep a note on this point.

Our replication of data is at the storage level. Does the size of the LUN affect the storage spilt?

Experts, any more experiences to share?

Thanks in advance.

Regards
Shomil
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Richard OlutolaConsultantCommented:
See the document I followed when I've implemented ASM. It's a very brief document.

http://docs.oracle.com/cd/E11882_01/server.112/e18951/asmprepare.htm#BABJHHEC

It is a very useful resource. Let me know if you are unsure of anything.

R.
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