Storage Management (ASM ACFS DNFS ODM) (MOSC)

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Setting Larger AU Sizes for VLDBs

edited Aug 20, 2012 10:12AM in Storage Management (ASM ACFS DNFS ODM) (MOSC) 1 commentAnswered

 Hi,
I've been tasked with building an 11.2.0.2 2-node RAC database on Solaris 10.  It has been estimated that the database will grow to at least 20 TB, possibly as large as 80 TB.

I was reading MetaLink Note 368055.1 - Deployment of very large databases [10TB to PB range] with Automatic Storage Management (ASM) .  This doc, which seems more 10g focused, suggests changing the Allocation Unit size to 16MB and the strip size to 1MB, via the underscore parameters _asm_ausize and _asm_stripesize.

In the 11.2.0.2 ASM Configuration Assistant, the Advanced Options button brings up several additional options when creating a new disk group - Allocation Unit sizes of 1MB, 2MB, 4MB, 8MB, 16MB, 32MB and 64MB.

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