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LUNS allocation to RAC [message #536009]

Sun, 18 December 2011 23:43

twalaa
Messages: 3
Registered: May 2007
Location: Pretoria

Junior Member

Good Day.

We are planning the RAC installations. We are allocate 3TB on HP SAN Storage to be used to setup rac environment with 2 nodes.

Question.

1. Do we accept one 3 TB from SAN engineers or ( Which RAID)

2. Multiple Luns totality to 3 TB.

3. Remember this is 11g R1 OCR and VOTING DISK cannot be managed by ASM.

Regards
AT

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Re: LUNS allocation to RAC [message #536070 is a reply to message #536009]

Mon, 19 December 2011 02:56

John Watson
Messages: 8976
Registered: January 2010
Location: Global Village

Senior Member

Are you intending to use ASM or a clustered file system for the database storage?

(btw, I see you are in Pretoria: Orafaq has very strong connections with ZA.)

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Re: LUNS allocation to RAC [message #536267 is a reply to message #536070]

Tue, 20 December 2011 01:50

twalaa
Messages: 3
Registered: May 2007
Location: Pretoria

Junior Member

We intending to use ASM for Database files. Another question is the VIP address, we are given IP Address(Eth02)for public address and EthO3 for private. How do we step for VIP? do we request another sets of IP addresses

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Re: LUNS allocation to RAC [message #536273 is a reply to message #536267]

Tue, 20 December 2011 02:12

John Watson
Messages: 8976
Registered: January 2010
Location: Global Village

Senior Member

There are some things you must get right with ASM at the beginning. This is a partial list.

1. RAID. Oracle has changed it's advice. Until recently, they said "if your hardware can do RAID, use it". Now they say "use JBOD". There are valid resons to go either way.
2. Give ASM at least 8 LUNs for each disc group.
3. Use allocation unit size of 4M
4. Your tablespaces must be uniform extent size to match the AU size.

That's the beginning. If you want consulting support, please PM me. We do a lot of work in South Africa.

VIPs are a whole different matter, you'll need to open another topic for that.

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